LEICA GS50 - Newegg · terminal and antenna. This is used in the field to collect and record spatial (position) and non-spatial attributes. After the data is collected in the field,

User Manual / Getting Started with the GS50 / GS50+

50403020 LEICA GS50 / GS50+

Version 4.0English

LEICA GS50

GIS

2Preface GS50 / GS50+-4.0.0en

Congratulations on your purchase of a new Leica Geosystems GS50 / GS50+.

This manual contains important safety directions as well as instructions for setting up the productand operating it. Read carefully through the User Manual before you switch on the instrument.

GS50 / GS50 + Sensor

3GS50 / GS50+-4.0.0en Preface

Product IdentificationThe model and serial number of the GPS Sensor (GS) and Terminal (TR) are indicated on the type plate. The modeldesignation of the External Antenna (AT/RTB/RTS) is indicated on the housing.Please enter them here, and always refer to this information when you need to contact your agency or serviceworkshop.

GPS Sensor: Type: Serial No.:

GPS Terminal : Type: Serial No.:

External Antenna : Type:

4Preface GS50 / GS50+-4.0.0en

Symbols Used In This Manual

Symbols used in this manual have the following meanings:

DANGER:Indicates an imminently hazardous situation which, if not avoided,will result in death or serious injury.

WARNING:Indicates a potentially hazardous situation or an unintended usewhich, if not avoided, could result in death or serious injury.

CAUTION:Indicates a potentially hazardous situation or an unintended usewhich, if not avoided, may result in minor or moderate injury and /or appreciable material, financial and environmental damage.

Important paragraphs which must be adhered to in practice as theyenable the product to be used in a technically correct and efficientmanner.


OverviewIntroduction

System Description

Getting Started With New Equipment

Care and Transport

Technical Specifications

7

8

12

48

49

Overview

6Preface GS50 / GS50+-4.0.0enContents

Contents1. Introduction ............................................... 7

2. System Description ................................... 82.1 GS50 / GS50+ Sensor .......................................... 82.2 GIS DataPRO Post-processing Software ............. 11

3. Getting Started With New Equipment .... 123.1 GIS DataPRO Post Processing Software ............ 123.2 Receiver Hardware ............................................. 12

3.2.1 Charging batteries ..................................... 123.2.2 Setting up the GS50 / GS50+ for field datacollection ............................................................ 13

3.3 Using the GS50 / GS50+ Sensor ......................... 153.3.1 Before you begin: ....................................... 153.3.2 QuickStart Tutorial - GIS Data Collection .... 193.3.3 QuickStart Tutorial- GIS Navigation/Update 36

3.4 Real Time Differential Options ............................. 413.4.1 Coastguard Beacon Differential Service ........413.4.2 Satellite based Landstar System (RTS) ........42

3.5 Offset Interface Options ........................................443.6 GIS Application ....................................................443.7 Special Features ..................................................45

3.7.1 Max Trak ....................................................453.7.2 Auto Stop and Threshold Settings ................46

3.8 Processing Data In The GIS DataPRO Software ....47

4. Care and Transport ................................. 48

5. Technical Specifications ......................... 495.1 GS50 / GS50+ Tracking Characteristics ................495.2 GPS Antennas .....................................................505.3 Equipment Weights ..............................................505.4 Power ..................................................................505.5 Environmental Specifications ................................505.6 Separation Distances ...........................................515.7 Baseline Precision ...............................................51


The Leica Geosystems GIS DataPRO system is com-posed of both hardware and software components.

1. Introduction

The hardware consists of the GS50 /GS50+ sensor, TR500terminal and antenna. This is used in the field to collectand record spatial (position) and non-spatial attributes.

After the data is collected in the field, the GIS DataPROoffice software allows you to import, edit and export thedata to your GIS. The software can also be used to designcodelists which allow you to customize the field datacollection process to suit your needs. To learn moreabout the GIS DataPRO office software, please consultthe "Getting Started with the GIS DataPRO Office Soft-ware User Manual".

Introduction

LeicaGIS DataPRO

HardwareGS50/GS50+

TR500Antenna

Software

GIS DataPRO

8System Description GS50 / GS50+-4.0.0en

2. System Description

The GS50 /GS50+ sensor consistsof both ahandheld terminal (TR500),and the GPS receiver itself. TheGPS receiver receives the GPSsignal from the NAVSTAR satellitesand calculates a range to the satel-lites that are visible.

The GS50 is a 12-channel L1 codeand phase GPS receiver. Phasemeasurements are used internally tosmooth pseudorange measurementsfor higher code positioning.

The GS50+ is a 12-channel L1, 12-channel L2 code and phase GPSreceiver. The standard GS50+records L1/L2 code and phasemeasurements for post processingand RTK purposes.

Data can be stored for post process-ing in Ski-Pro or GISDataPRO.Baselines can be calculated with aprecision of 5-10mm +/-2 ppm.

2.1 GS50 / GS50+ SensorWith a radio modem the receiver canbe used for RTK measurements.Coordinates can be calculated with aprecision of 1cm.

There are several Antennas avail-able:GS50:• AT501 tracks L1 only• RTB/RTS Combined Antennas

track L1 and RTCM Differentialsignals.

GS50+:• AT502 Dual frequency antenna• AT 503 Dual Frequency Coke Ring

Antenna• AT504 JPL Design Dual Frequency

Choke Ring AntennaPlease see section 5 for technicalspecifications.

9GS50 / GS50+-4.0.0en System Description

GPS Receiver

The TR500 terminal fits either directly on the receiver or can be connected to the terminal port using a cable.A radio modem or an RTB module can also be fitted directly to the receiver. Alternatively, if the housing is not beingused, the radio modem can be connected to Port 1 or Port 2 using a cable. The GS50+ has an additional Port (Port 3at the upper left side of the front plate ) that can be used also for Power/data in/out put.

The antenna is connected to the receiver via the ANT Port.External power can be connected via a cable through the power port (PWR) or Port 2.

1. 5 pin Lemo. Power2. Power ON/OFF3. GPS Antenna in.4. Port 2. 5 pin Lemo. Power/data in/out.5. Pressure equalization vent.6. Port 1. 8 pin Lemo. Power/data in/out.7. PC Card door.8. Terminal in/out or Remote Interface in/out.9. Port 3. 8 pin Lemo Power/data in/out

(GS50+ only)

8

1 2 3 4 5 6

7

2.1 GS50 / GS50+ Sensor, contd.

9

10System Description GS50 / GS50+-4.0.0en

Terminal (TR500)

Use the CONFIG key to enter theConfiguration menus at any time.

The CE key is used to clear the lastcharacter entered when enteringnames, numbers, etc. into thereceiver.

Use the ENTER key to confirm anentry into the system.

Use the STATUS key to accessstatus information at any time.

Use the Cursor keys to move aroundthe screen.

The keys F7-F10 are user definablefunction keys. They can be definedto execute commands or access anyscreen of your choosing.

2.1 GS50 / GS50+ Sensor, contd.

The terminal keyboard is a QWERTYlayout designed for use in tempera-ture extremes and also for glovedhands if necessary.

The six keys F1-F6 at the top of thekeyboard correspond to the sixsoftkeys that appear on the screenwhen the terminal is activated.

Pressing Shift followed by F1 willalways activate the Help screen.Pressing F6 will quit the Help andreturn you to the screen you were on.Alternatively, pressing Shift followedby F6 will quit the current application.

Use the Esc key to step back to theprevious screen at any time.

Use the Shift key when the Shiftsymbol (⇑) is displayed to revealfurther choices on the softkeys F1-F6. �

F1 F2 F6F5F4F3

ESC SHIFT CEQ

W E R T Y U I OP

A S D F G H J K L

Z X C V B N MCAPS

CONFIG SPACE ENTER

STATUS7 8 9

4 5 6

1 2 3

0 . ±

ALT F7ON/OFF

F8 F9 F10

HELP END

11GS50 / GS50+-4.0.0en System Description

2.2 GIS DataPRO Post-processing Software

GIS DataPRO is used for datacollection preparation and data postprocessing.Please refer to the "Getting Startedwith the GIS DataPRO Office Soft-ware" User Manual for more details.

12Getting Started With New Equipment GS50 / GS50+-4.0.0en

Charge the batteries with the LeicaGeosystems battery charger pro-vided. GEB121, GEB70 or GEB71batteries may be used to power theGPS equipment.

The GEB121 batteries may becharged using GKL111 or GKL122chargers.

The battery chargers areintended for indoor use only.

Use a battery charger in a dry roomonly, never outdoors. Charge batter-ies only at an ambient temperaturebetween 10°C and 30°C ( 50°F to86°F ). We recommend a tempera-ture of 0°C to +20°C (32°F to 68°F)for storing the batteries.

3.2 Receiver Hardware

3.2.1 Charging batteries

Use only the LeicaGeosystems batteries,

chargers and accessories, or acces-sories recommended by LeicaGeosystems.

The GEB70 and GEB71 batteriesmay be charged using GKL122 (withcharging cables), GKL23 or GKL22chargers.Refer to the appropriate manualwhen using the chargers.

To attain full battery capacityfor new GEB121 batteries, it

is essential to repeat between threeand five complete charge/dischargecycles.

3.1 GIS DataPRO PostProcessing Software

3. Getting Started With New Equipment

To install the GIS DataPRO software:

1. Insert the CD-ROM into the CDdrive of your PC.

2. Execute the "Setup" command.3. Follow the instructions that

appear on the screen.

Both a hardware and software usermanual can be found on the CD inPDF format.

The software itself contains a com-prehensive online Help System.

13GS50 / GS50+-4.0.0en Getting Started With New Equipment

3.2.2 Setting up the GS50 / GS50+ for field data collection

The following will outline the stepsnecessary to set up the GS50 /GS50+ sensor for field data collec-tion.

1. Connect the antenna to the sensorusing the antenna cable.

2. Plug two GEB121 batteries intothe backside of the sensor.Alternatively, you may want topower the sensor externally. In thiscase, connect the external powersource to the Power port on thefront of the sensor.

For an external powersource, use only the Leica

Geosystems battery pack, or astable 12V source.

4. Insert a PC-Card into thesensor.

Lock the lid carefully after insertionof the card in order to prevent waterand dust from getting inside thesensor.

Never insert or remove PCcards with the systempowered on!

Your GS50 / GS50+ sensor is nowfully ready for operation.

3. Attach the TR500 terminal to thesensor, either directly or via aconnection cable by plugging itinto the TERMINAL port on thesensor.


By activating the formatcommand all data will belost! Make sure that all

important data which resides on thePC-Card is properly backed-upbefore reformatting the card. If youwant to reformat the internal memorymake sure that all important data isfirst transferred to the PC.

If a PC-Card is being used for thefirst time with the GS50 / GS50+, oryou wish to delete all data thatresides on the PC-Card, then followthese steps to format the PC-Card.

From the main menu press 4 on theterminal or use the Cursor key tohighlight the line "Utilities", thenpress ENTER; alternatively press F1CONT.(If only lines 1 to 3 are visible at thisstage press F4 SHOW first).

Then press 2 to get access to the"Format Memory Module" panel, oralternatively use the Cursor key tonavigate to "Format Memory Module"and press ENTER; again alterna-tively press F1 CONT.

You are now in the Utilities \ FormatMemory Module panel:

If you want to format the PC-Cardjust press F1 CONT to format thecard. Alternatively, if you havepurchased the internal memoryoption, and would like to format itpress ENTER.

A listbox opens which allows you toselect the internal memory.

Use the cursor key to highlightInternal, then press ENTER. Thenpress F1 CONT in order to start theformatting process of the internalmemory.

If, at this point, you do not wish toformat the memory device, simplypress ESC instead of F1 CONT. Thiskeystroke brings you always a stepback into the previous panel withoutexecution of any command.

Once the formatting of the card iscompleted the MAIN\ panel willreappear.

3.2.2.1 Formatting your memory card (optional)


The top part of the GS50 / GS50+ sensor panel containsseveral symbols (icons) which indicate the currentsystem status.

3.3 Using the GS50 / GS50+ Sensor

3.3.1 Before you begin:

3.3.1.1 Icon Explanation

Please note that the GS50 is an L1 code onlyreceiver.

Accuracy Status

High Precision Navigation (cm level)(available with the RTK option on GS50+)

Precision Navigation (0.5 - 5m level)

Navigation (<100m)

When no position is available, no icon is shown.

Position Mode

Static - the GPS Antenna should be heldstationary.

Moving - The GPS Antenna may move.

The Position Mode is governed by the type of operationdefined in the Configuration.

AccuracyStatus

PositionMode

No. VisibleSatellites

No. Satellitesused on L1/L2

GSMStatus

MemoryStatus

LocalTime

RadioStatus Observation

RecordingStatus

Auto PositionRecordingStatus

BatteryStatus


No. Visible Satellites

The number of theoretically visible satellites according tothe current almanac is displayed. This number dependson the last computed position within the receiver, and thecurrent almanac.

No. Satellites used on L1/L2

When an Accuracy Status icon is displayed, the numberof satellites currently used for the position computation isshown. Satellites that are tracked with a poor signalquality are not shown.

When no Accuracy Status icon is displayed the numberof tracked satellites are shown, irrespective of the signalquality.

Please note that since the GS50 is an L1 codeonly receiver, the number of satellites used onL2 will be blank (-).

Radio Status

Radio Transmitting (blinks)

Radio Receiving (blinks)

If two radio modems are being used simultaneously, theicon will alternate between each modem.

GSM Status

The GSM phone is connected to the network.

If this icon blinks, the GSM phone is either trying toconnect to or disconnect from the network.

3.3.1.1 Icon Explanation, contd.


Memory Status

Internal Memory selected

PC-Card selected

Safe to remove PC-Card

Memory level Indicator. Has 12 levels between:

Memory Empty and

Memory Full

Observation Recording Status

The receiver is recording raw GPS observa-tions in Stationary mode. The receiver shouldbe held stationary.

The receiver is recording raw GPS observa-tions in Moving mode. The receiver may move.

Auto Position Recording Status

Positions are being recorded automaticallyaccording to distance.

Positions are being recorded automaticallyaccording to time.



Local Time

The local date can be set to display either 12 or 24-hourclock.


Battery Status

Battery Voltage OK

Battery supplying 2/3 peak voltage

Battery supplying 1/3 peak voltage

Battery empty

External battery is in use

The letter next to the batter icon indicates the batterybeing used. "A" and "B" are the plug-in camcorderbatteries, and "E" is the external battery.


The QuickStart Tutorial will guideyou through a typical data collectionsession.

Each step will indicate which panelyou should be viewing by displayingthe menu title in brackets (i.e. MAIN\for the main menu panel).

3.3.2 QuickStart Tutorial - GIS Data Collection

Step 1: Beginning GIS DataCollection (MAIN\)

Turn on the sensor by pressing theON button on the terminal. Thefollowing panel will appear:

This is the main data collectionpanel. Pressing ESC will take you tothe main menu:

From the main menu, entering "1" onthe keypad, or highlighting GIS DataCollection using the cursor keys andthen pressing ENTER or F1 CONTwill bring you back to the main datacollection panel.

Upon power on you will see the"Number of visible Satellites" icon,indicating the number of satelliteswhich are theoretically visible at thecurrent location and time. Usuallythis number varies between 4 and12, depending on the satellite geom-etry. This number is based on theGPS Almanac saved in the GS50 /GS50 + sensor and the last com-puted position by the system. Thisnumber does not indicate thenumber of satellites the system istracking.


Next to this symbol you'll find the"Number of Satellites used on L1and L2 ". The number indicates thecurrently tracked satellites on L1 andL2. Note that only the GS50+ willshow tracking on L2 because of itsdual frequency capability. On initialstart-up, this number will read 0since it takes about 30 seconds tostart tracking satellites.

Both "Number of visible satellites"and "Number of satellites used"icons will change from time to time,reflecting changes in the satellitegeometry due to either the rise ofnew satellites or the setting ofdescending satellites.

Position Fix Indication

The GS50 / GS50+ sensor willcompute a 2D-position once 3satellites are tracked. A 3-D positionwill be computed once a minimum of4 satellites are tracked.

Note that for certain reasons 2Dnavigation can become disabled withthe configuration. Please check theTechnical reference for more infor-mation.

If the accuracy icon doesnot become visible even

after one or two minutes then thesensor is still not tracking satellites.One cause for this is the receiverreceiving signals at a location morethan 500km from the startup posi-tion. If this is the case, then thereceiver will download a new alma-nac. This will take about 15 minutes.Another cause for the receiver nottracking is a faulty antenna cableconnection. Please check whether

the antenna cable is connectedproperly to both the sensor andantenna.

If you're in an open areawith no obstructions, the

"number of satellites used" shouldcorrespond to the "number of visiblesatellites". However, in obstructedareas, such as urban canyons orforested areas, it is unlikely that thereceiver will be able to track all thesatellites in the sky. This is not aproblem, but will degrade the accu-racy of measurements slightly.Consequently, please keep monitor-ing the accuracy icon.

If you are getting no positionat all, check if the DOP Filter

in the configuration setting isconfigured to a small value.Once the Accuracy Status iconappears, data collection can begin.

3.3.2 QuickStart Tutorial - GIS Data Collection, contd.


Power Status

The battery status icon, located onthe far right side of the status line,conveys two pieces of information.First, which power source is beingused, and second, the voltage levelof the current power source.

The GS50 / GS50+ can be poweredby three sources, one of two internalbatteries, A or B, or one externalsource, E. The battery status iconwill indicate which power source isbeing used.

The battery status icon indicates thevoltage level of the currently usedbattery in 4 different stages from"full" (fully black), to 2/3, to 1/3, to"empty" (clear).

Memory Status

The memory status indicator iscomposed of two icons. The icon onthe left indicates which memorydevice is being used; internalmemory, or external PC-Card. Theicon on the right indicates the avail-able memory in the selected memorydevice. This icon has 12 levelsbetween full (all black), and empty(clear).

You must have either aninternal memory device

(optional), or a PC memory cardinstalled in the GS50 / GS50+ toproceed with GPS data collection.

Step 2: Choosing your Configura-tion Set (DATA COLL \ Begin)

Some basic decisions have to bemade in this panel: which configura-tion set should be activated, in whichjob the raw data should be storedand which antenna set-up should beused.

A Configuration Set (Config Set) is acollection of sensor parametersneeded to perform various methodsof data collection. These includedata recording rates, data formats,antenna types, coding methods, etc.

Several default configuration setsexist which cover standard datacollection scenarios. For informationon how to create configuration sets,please refer to the hardware refer-ence manual on the GIS DataPROsoftware CD.



If no real time differential correctionsare used (i.e. you do not have theRTCM differential beacon moduleattached to the sensor), you shouldselect the GIS_PP (PP = PostProcessing) configuration set. Youcan make this selection either byusing the "cursor left" key to togglebetween all available configurationsets until GIS_PP appears or youcan highlight the input field andpress ENTER. Then a listbox comesup showing all available sets:

Now use the cursor up or cursordown key on the terminal to highlightthe GIS_PP line. Then press ENTERor F1 CONT.

Step 3: Choosing your Job name(DATA COLL \ Begin)

Jobs are used to organize andstructure the data you collect in thefield. Jobs can comprise an unlimitednumber of points together with allrelated information (raw measure-ments, codes, etc.).

It is suggested to create a new jobwhenever you start a new project.

Upon formatting the memory device(i.e. PC-Card or internal memory(optional) ) a default job is automati-cally created.

You can decide whether you like tocreate manually jobs or a automati-cally generated job everyday you areusing the GIS Data Collection. Toactivate the automatically creationpress the CONFIG key change to 3'General' and select 5 'Start - Up'.Highlight the 'new Job' field andselect 'New Job per day'.

You can either use this Job straightaway or you can create Your own jobby doing the following:Move the cursor up or cursor downkey of the terminal into the input fieldfor jobs. Then press ENTER. Thefollowing listbox will appear:

Now press F2 NEW. The followingpanel appears:



You can now enter a name for a newjob; press ENTER upon completingthe input of the name. Input fields fordescription and creator are optionaland can be left blank.

As an example we can create a newjob called "Test":

By default the new job will be storedon the PC-Card. You can change thestorage location to the internalmemory by toggling the Device inputfield to Internal.

Pressing F1 CONT will confirm thecreation of a new job name. PressESC if you want to leave this fieldwithout creating a new job. PressingF6 QUIT has the same effect.

After pressing F1 the list of availablejobs is updated and now also showsthe job "Test":

Now press F1 CONT to confirm theselection of the newly created job.

Step 4: Choosing your codelist(DATA COLL \ Begin)

A codelist is simply a list of codes orfeatures. Codes are the buildingblocks of the codelist and may bethought of as features.

Codelists are selected in the usualway: first use the cursor down key toget this input field highlighted. Thenuse the cursor left key to toggleamong the several options until thecorrect one appears. Alternativelyyou can press the ENTER key to geta listbox from which the choice canbe made, or a new codelist can becreated.

Please note that you mustselect a codelist in order tocollect data.



Creating a new codelist

From the codelist menu box, pressF2 NEW to create a new codelistname.

The following panel should appear:

As an example, we will create acodelist called “Utility”. Enter theword Utility in the Name input fieldand press ENTER. Press F1 CONTto return to the codelist menu box.The Utility codelist should nowappear in the menu box. Make surethe Utility codelist is highlighted, andpress ENTER.

This codelist will not have any codesassociated with it. Step 5 will explainhow to create new codes.



Step 5: Selecting or creatingcodes for data collection (FEA-TURING\)

You are now in the FEATURING\panel. This panel allows you toselect or create codes for datacollection. Codelists can also becreated using the Codelist Managermodule within the GIS DataPROsoftware.

If in the previous step you selectedan existing codelist, a number ofcodes should appear in the codelistbox. If you created a new codelist inthe previous step, this listbox shouldbe empty.

Creating codes

If your codelist contains no codes,your codelist menu box should looklike this:

Press F2 C-LST to change to theCONFIGURE \ Coding panel andPress F3 CODES followed by F2ADD to create a new Code.

Use the right or left cursor key tochoose the code type (point, line, orpolygon). Enter the name of thecode, and a note about the code(optional), in the appropriate inputfields.


Now all required settings for a typicaldata collection session are made.The Data Coll \ Begin panel looks thefollowing:

Pressing F1 CONT finishes this start-up sequence.

Please Note that theAntenna setting appears

only in Advanced mode and can onlybe changed in the configuration set.


As an example, we will create a pointcode named Pole. We will input thefollowing note in the note field,"Offset to road". The note field canbe used to describe the manner inwhich data is collected for a particu-lar code. In this example, we aremeasuring the pole location from theroad. Press F1 CONT to continue.

We will also create codes for bothline and area types:

Pressing F4 ATRIB on any of thesepanels will allow you to createattributes for your code.


Choice listNew F2 adds an attribute to thecode. The use of Choice lists helpsto set the right value to an attribute.You can either create a choice list inGISDataPro or on the sensor.There are two ways to create achoice list on the GS50 / GS50+.Either create it with a CXT file orcreate it in the New Attribute panel.To create a choice list on the sensorwith an Ascii CXT text file use anormal text editor on your PC. Listthe values you like to use and savethe text file with the same name asthe attribute name. Use the exten-sion CXT for the Ascii text file so thatthe GS50 / GS50+ can identify thefile as a choice list.


Please note that thefollowing attribute namesare reserved for internal

use and should not be created inthe field:

NAME, COLOR, Z, OrZ, STYLE,FONT, SYMBOLSIZE, ROTATION,IT_KEY, IT_RECNO, IT_EDIT,IT_GEONM, IT_GEOID, IT_STATUS,IT_STIME, IT_OCP, IT_STD,IT_PDOP, IT_ANTHGT, IDX_CODE,IDX_INDEX

Copy the CXT File to your PC Cardin the Folder CODE and use thesensor transfer, 05 codelist and F6More to transfer the CXT to yoursensor.After transferring the CXT file to thesensor the choice list is available forthe attribute.Select the Code with the CXT cre-ated choice list and press F5 LIST inthe ATTRIBUTION panel to displaythe choice list. To select a valuetoggle with the up and down keybetween the different values andselect the right value with ENTER.To create a choice list in the field,enter the New Attribute panel andcreate a new attribute. Set a defaultvalue to the attribute and LIST F6 willappear. LIST F6 allows you to createa choice list.

To fill the choice list with valueschange to the ATTRIBUTION panel,highlight the attribute and pressENTER. Type in a new value andadd the value with ADD F2.Use the CXT choice list when youneed more than 14 values for aattribute in the choice list.



The codelist should now look likethis:

If you create attributes for a code,then the last column of this panel willdisplay what type of code it is (P-Point, L-Line, or A-Area). You willsee the type indication in the lastcolumn of this panel.

Selecting codes

Use the up and down cursor key tomove through the codes in thecodelist.

The field on the far right of thecodelist menu box indicates the typeof each code (point P, line L, or areaA). After highlighting the desiredcode, press F1 CONT to begin datacollection. To continue our example,select the Pole code.

Step 7: Logging point data(ATTRIBUTION\)

In this step, you will collect thespatial attribute (position information)for your Pole (point) code.

It is time to check again the icons onthe top of the display. The positionicon should be available, the positionmode icon still indicates "moving",the "number of satellites visible" iconshould display a number greater orat least 4, and the number of usedsatellites will generally be the sameas the number of visible satellites, ifyou are in a relatively open area.

We are now in the ATTRIBUTION\panel. For the Pole code, the panelshould look like the following:



Pressing F4 OFFS will allow you toenter an offset to the desired pointcode. You can enter this offset in oneof five ways:

• Bearing and Distance• Double Bearing• Double Distance• Chainage and Offset (Advanced)• Backward Bearing & Distance

Once a hidden point was measuredwith bearing and distance method, aLAST F2 button becomes visible thatallows you to select the last meas-ured Point within the hidden pointoption. If you like to select a point outof the existing points shift F2 PtLSTwill lead you to the existing point list.

The GS50 / GS50+ interfaces to anumber of laser range finders that willallow you to accurately measure offsetdistances and angles. The followinglaser range finders are supported:

• LTI Criterion 400• LTI Criterion compatible• Leica Laser Locator• MDL LaserAce 300• Leica Geosystems Disto pro4• Leica Geosystems Disto pro4a• Laser Atlanta

You can configure your GS50 /GS50+ to interface with your laserrange finder from the CONFIGURE\OFFSET panel.

Please see the TechnicalReference Manual for more

information.Please use only the special designedcable that is delivered with the device.Wrong cable may damage your device!As soon as you are tracking aminimum of 4 satellites, the accuracyicon is visible (indicating goodposition quality), and the antenna ispositioned close to the feature, youshould press F1 OCUPY.

This activates logging of raw dataand the panel changes accordingly:Notice that the position mode iconhas changed to static mode, indi-cated by a symbol of a tripod.

During data logging, attribute infor-mation can be entered into theappropriate input fields. In thisexample, “Pole 1” has been enteredfor Attrib 1.

If ESC is pressed during an attribu-tion process is ongoing, the user isasked if the collected data should bestored or deleted.



Once a sufficient amount of raw datahas been collected, you can stopdata collection by pressing F1 STOP.

Data collection times willdepend on the situation. If

the unit is being used as a referencefor post processing, then data mustbe continually logged until all rovingreceivers have stopped collectingdata. If the unit is operated as aroving receiver the site occupationtime depends mainly on the baselinelength and your accuracy require-ments.

The FEATURING\ panel will appearagain. You can now choose a differ-ent code for data collection, orcontinue collecting more featureswith the same code. The receiver willdefault back to the previously col-lected data.

The antenna must not bemoved while point data is

logged, otherwise the quality of thecollected data will be degraded!

The PC-Card must not beremoved while in the ATTRI-

BUTION\ panel. If the card is takenout of the sensor all stored datamight be corrupted, preventing GISDataPRO from successfully readingthe data on the card.

You can change the dis-played Quality information

from the CONFIGURE/Operation/Formats panel. DOP and positionalquality can be displayed.

If needed, the TR500 terminal canbe disconnected and reconnectedwhile logging data. When reconnect-ing the terminal the same panel willreappear.


Using Point ID Templates

By default, the GS50 / GS50+ usesthe time and date stamp to uniquelyidentify point features. You candefine a point ID template to custom-ize point names. You can access IDTemplates from CONFIG/DataCollection/ID Templates.

From the CONFIGURE/ID Templatespanel, press F2 NEW to create anew Point ID Template.


To define your own Id Templatepress NEW (F2).

You will be able to specify the Id, thestart and end position of automaticnumbers, the amount by which theyincrement at each point and thedefault position of the cursor. Notethat leading spaces cannot beaccepted.

In case you are using the standardTime and Date ID template settingyou have the choice to change thefirst four ID digits from the 'SensorID' to the used 'Code'. Press F3EDIT in the CONFIGURE \ ID Tem-plates panel and toggle between'Sensor Id' and 'Code' with the left orright arrow keys. If you select 'Code'the point ID will have the Code namein its first 4 digits.


Step 8: Logging line and area data(ATTRIBUTION\)

In this step, you will collect thespatial attribute (position information)for your Pwrline (line) code. Areacodes are collected in exactly thesame way.

From the FEATURING\ panel, selectthe Pwrline code and press F1CONT. This will bring you to theATTRIBUTION\ panel.Pressing F4 OFFS will allow you toenter an offset to the desired line orarea code. Offset information isentered by specifying a distance andthe relative direction where this offsetwill be applied (to the left and/or rightof the actual line feature).In case you are working with left/rightoffset applied to line or area features,please ensure to avoid sharp turns indirection during measurement,otherwise the computation of offsetlines may result in far off layingpoints.

Id - Displays the way in which thetemplate is currently configured. Youmay also enter any standard texthere that you would like to see in theId Template. (In this example thestandard text is the word "Point". The# symbols indicate automaticallyincrementing numbers).Num Start - Defines the start posi-tion of any automaticallyincrementing number.Num End - Defines the end positionof any automatically incrementingnumbers.Auto Inc - Defines whether thenumber will increment automaticallyat subsequent points.Num Inc - Defines the amount bywhich any automaticallyincrementing number will increment.Cursor Pos - Defines the position atwhich the cursor will start at.

Press CONT (F1) save changes tothe template.


Streaming Line Data by Time

Begin logging line data by pressingF1 START. Notice that the GS50 /GS50+ begins making measure-ments at a constant rate (default is 1Hz) and informs you of how manynodes have been measured.

The line/area data log ratecan be changed from theCONFIGURE\Positionpanel.


Streaming Line Data by Distance

You can also measure lines andareas by distance.From the lineattribution panel, press Shift F3DIST.

Enter the desired distance betweennodes and press F1 CONT. You willbe taken back to the line attributionpanel. Press F1 Start to begincollecting the line or area feature bydistance. This configuration willremain in memory until the receiveris powered down.

To avoid such scenarios the systemgives a suggestion for the minimumnode distance of lines / areas whenoffset left or right is used. The valueis calculated by half of the line / areaoffset.In the ATTRIBUTION \ Distancepanel press F1 CONT to accept thesuggested value for the minimalNode distances.The minimal distance value can bechanged within the ATTRIBUTIONpanel by pressing SHIFT F3 DIST.

Line and area offsets willonly work for real time datacollection.

There are three ways to collect lineor area data: streaming by time,streaming by distance, or noded.


Nested data collection

While collecting line or area data, itis possible to interrupt the currentdata collection, and collect data forany other code in your codelist. Thefollowing outlines the steps neces-sary to collect a nested point:

• Press F2 NESTD.• Select any code from the

codelist.• Press F1 OCUPY/START to

begin the nested data collec-tion.

• Press F1 STOP to stop thenested data collection.

The panel should return to the codefor which data collection has beenpaused.

• Press F4 RESUM to finish theline or area or

• Press F2 NESTD to collectanother nested feature.

The antenna must not bemoved while noded data is

logged, otherwise the quality of thecollected data will be degraded!

You can change the numberof positions which are

collected for a static node in theConfiguration setting from theCONFIGURE \Occupation panel withF4 NODES or via the CONFIG keyfollowed by '2 Operation' and '2Occupation Settings'.

While you are in the Attribu-tion panel Shift F2 PtLst

allows you to add any, alreadymeasured point, out of the point listas a new node.


Noded Line Data

You can also collect data at thenodes of the line (i.e. where the linechanges direction). Move to the firstnode in the line and press F3 Node.A counter will appear on the paneland will count up to 5. Five observa-tions are recorded at each node.Repeat this for as many nodes asare needed. Once a minimum of twonodes are collected, the F1 DONEkey will appear. Press F1 DONE toend the line data collection.



After completing collecting data forthe line, press F1 STOP.

You can nest an unlimitednumber of lines, areas orpoints.

When returning to a line orarea after nesting, it is

important to return to exactly thesame position, otherwise, the posi-tion estimate will be degraded.

Displaying Information and graph-ics

While collecting line or area data, itis possible to display the objectbeing collected and to review infor-mation such as perimeter and area.

• Press Shift, then F4 PLOT todisplay the line or area or

• then Press F5 INFO to displayperimeter and area.

• Press F4 REDRW to updategraphical and numeric infor-mation.

You can review point, lineand area data at any time

using the Point/Line/Area managerfound in the Application group of themain menu. Refer to the Tech RefManual for more information.

Creating vertices from previouslycollected points

While collecting line or area data, itis possible to use previously col-lected point to create, append ormodify an object.

• Press Shift, then F2 PtLST todisplay a list of availablepoints. Pressing shift again wildisplay additional browsingand filtering tools.

• Choose add and the pointbecomes a vertex on your lineor area.


Step 9: Ending data collection

You can now quit the data collectionpanel by pressing SHIFT F6 QUIT.This brings you back to the mainmenu.

Pressing SHIFT F6 willalways allow you to termi-

nate data collection, even during asite occupation. In this case you willloose all data collected since press-ing OCUPY.

As soon as you are back to the mainmenu, the PC-Card may be re-moved. The PC-Card icon willcontain a down arrow, indicating thatit is ok to remove the PC-Card.

Line Segmentation

While collecting line data, it is possi-ble to segment the line to enterdifferent attributes without stoppingcollection.

• Press Shift, then F5 SEG andyou will be promted to enterinformation corresponding tothe attributes of the newsegment.

Segmentation does notcurrently support offset data.


You can now switch off the sensor.Once power is off disconnect allcables and put all equipment backinto the shipping case.


3.3.3 QuickStart Tutorial- GIS Navigation/Update

The GS50 / GS50+ allows you tocollect, update and verify fieldinformation.The following steps show you how tobring your data out into the field toupdate and verify them.

Step 2: Beginning GIS Data Navi-gation (NAVIGATION\ Begin)

The second step in GIS Navigation isto set the appropriate navigationparameters. These parameters areset in the NAVIGATION\ Begin panel.

1. Choose GIS Navigation/Updatefrom the main menu.


Step 1: Transfer the waypointproject to the sensor

After creating the waypoint projecton the PC (Please see Gettingstarted with GIS DataPRO office),transfer all the project files to thesensor.

1. Copy the waypoint project files tothe Geodb directory on thePCMCIA card.

The waypoint project files are lo-cated in the following directory:

…\Leica Geosystems\GIS DataPRO\Data\Projects\Your Project Name\Waypoint

Waypoint projects will have the "prj"prefix.


The NAVIGATION\ Begin panelallows you to set your configurationset, the source job for yourwaypoints, the codelist, and theantenna type.

2. Highlight and press ENTER on theConfig Set field. Choose apredefined configuration set, orcreate your own.

In order to navigate towaypoints, you must choose

a configuration set that supports realtime data collection. Also make sureyou are referencing the correctcoordinate systems. (F6 "CSYS")

3. Highlight and press ENTER on theWaypoints field. The waypointproject that you transferred ontothe PCMCIA card should appearin the Waypoints listbox.

4. Highlight and press ENTER on theCollect to field. (Only applicablefor ASCII waypoint files)

5. Highlight and press ENTER on theCodelist field to select a codelist touse for the navigation (field up-date) project.

6. Press F1 CONT to continue withwaypoint navigation.

You can also read waypoints from anASCII file. Press the F4 ASCII key tochange the source of the waypointsfrom a Job to an ASCII file. You canalso configure the ASCII file pressingF4 ASCII again. This will take you tothe CONFIGURE\Pt ASCII FileFormat panel.

3.3.3 QuickStart Tutorial- GIS Navigation/Update, contd.

The ASCII file should be placed inthe /Data/ directory on the PCMCIAcard. When navigating from anASCII file, you will need to write thedata (collect to) to a Job.


Step 4: Navigating to a waypoint(NAVIGATION\)

1. Highlight the waypoint list field andpress ENTER.

The following panel should appear.

The waypoint listbox will display thewaypoint number on the left and theattached code on the right.

2. Highlight the desired waypoint andpress ENTER.

After selecting the waypoint and thereference mark, one of two panelswill be shown. If you are further than100m the waypoint, you will see themacro navigation panel.

Applicable for the Arroworientation.

The macro-navigation panel displaysthe reference mark as a triangle, thetarget as a circle and your positionas a cross-hair at the center of thecircle.


Step 3: Setting your referencemark (NAVIGATION\)

You should now be in the mainnavigation panel.

The GS50 / GS50+ will allow you toorient your target point with respectto the sun, last point, known point,line or North or a direction arrow.

When using the directionarrow, the user must be in

motion for the sensor to correctlyorient.

To choose your orientation:1. Highlight the Orient field and press

ENTER.

2. Select your reference mark fromthe listbox and press ENTER.



If you are within 500m of thewaypoint, you will see the micro-navigation panel.

The micro-navigation panel displaysthe reference mark at the top of thescreen, the target as a circle at thecenter of the panel and your positionas a cross-hair.

3. Navigate to the waypoint andpress F1 OCUPY to collect posi-tion information.

4. To view your location relative tothe navigation objects.

Navigation arrow

Probably the easiest way to navi-gate, the Arrow orientation allowsyou to follow the arrow and whileobserving the distance to target.

Navigate by Line

And the ability to navigate along aline defined by: Two points.


Step 5: Verifying or updatingwaypoint information (MANAGE\Edit Point)

After navigating to the waypoint andcollecting position information, youcan check the feature's non-spatialattribute information.

1. Highlight the waypoint field andpress ENTER.

2. To edit the waypoint's attributes,press F3 ATTRIB.


The ATTRIBUTION\ Edit Point panelallows you to change a waypointsattached code as well as its at-tributes. Generally, waypoints willhave been created by converting anexisting code into a waypoint in theoffice software (Please refer to theGetting started with GIS DataPROOffice Manual). The attributes fromthe initial data collection will remainwith the waypoint since the code isattached. These attributes can bechecked and updated in the fieldfrom the ATTRIBUTION\ Edit panel.

3. Press F1 CONT to update thewaypoint.

4. This will bring you back to thewaypoint list. Select the nextwaypoint you wish to navigate to,and press ENTER.

5. Repeat steps 3 and 4 until allwaypoints have been updated.

Navigate by Line or Area

Navigation by Line or Area allowsthe user to navigate along a complexobject, observing their location (plus)in relation to the object and thevertex (x) of interest. In addition tothe ability to view and delete pointsalong an object, the new navigationfunction allows the user to add oredit new points along the complexobject.

While you are in the Graphic screenSHIFT F2 REDO allows you to addan additional new data stream. Boththe existing feature and the newlymeasured feature are displayedsimultaneously.


41GS50 / GS50+-4.0.0en Real Time Differential Options

3.4 Real Time Differential Options

The GS50 / GS50+ can beconfigured to operate in real-timedifferential mode. Real-time differen-tial corrections can be receivedeither by setting up your own broad-casting base station, or by using adifferential service provider. Pleaseconsult the Technical ReferenceManual to learn how to set up theGS50 / GS50+ to receive differentialcorrections via your own basestation.Using a differential service providerwill allow you to obtain real-time sub-meter positions without having to setup your own base station. The GS50/ GS50+ is capable of using one oftwo existing real-time differentialservice providers: the coastguardbeacon differential system, or theThales-Landstar satellite differentialsystem.

3.4.1 Coastguard Beacon Differen-tial Service

Your Leica DGPS system is able toreceive the coastguard beaconDGPS signals. The following sectiondescribes the coastguard beaconDGPS networks.

In the United States, the US CoastGuard (USCG) and Army Corps ofEngineers (ACE) have constructed anetwork of Beacon stations thatservice the majority of the easternUnited States, the entire length ofboth coastlines, and the GreatLakes. The Canadian Coast Guard(CCG) provides coverage in Canadafor the St. Lawrence River, through-out the Great Lakes, and bothcoastlines. In total, there are over160 stations operational worldwide.Coverage currently exists in manyother regions of the world includingEurope, Asia, Australia, Africa, andSouth America.

Beacon reference stations areinstalled at precisely coordinatedlocations within the coverage areas.Differential GPS corrections derivedfrom these stations are broadcastfrom the station using a low fre-quency carrier (283.5 kHz to 325.0kHz). Beacon stations typicallybroadcast RTCM message types 9and 2, but some authorities maybroadcast message types 1 and 2instead.

The beacon service is available freeof charge. Some privately installedbeacon stations do carry a servicecharge which can vary from stationto station.

For more information, users arereferred to the CommunicationSystems International WWW site:www.csi-dgps.com

42Real Time Differential Options GS50 / GS50+-4.0.0en

The GS50 / GS50+ has a defaultconfiguration set to be used for thebeacon service. After installing theReal-Time Beacon (RTB) module,choose the BEACON configurationset (RTCM message types 9 and 2)from the DATA COLL/Begin panel.By default, the unit will begin to trackbeacon signals using an automaticsearch algorithm. You can manuallytune the RTB module by pressing theCONFIG key and choosing theInterfaces option. F5 CTRL will allowyou to manually enter the beaconfrequency you wish to track.

Your Leica DGPS system is able toreceive the LandStar DGPS signals.The following section describes theLandStar DGPS networks and howto access service for different partsof the world.

Racal LandStar is a global differen-tial GPS (DGPS) data service whichprovides accurate and reliable DGPScorrections in real-time.

The following international RacalLandStar services are currentlyavailable:• North America• South & Central America• Europe & Northern Africa• Central & Southern Africa• Middle East & Western CIS• Asia Pacific• Australia & New Zealand

The LandStar reference stations areinstalled at precisely coordinatedlocations within the coverage areas.Differential GPS corrections derivedfrom these stations are sent viadedicated data connections to theLandStar hub and control center.Here, the information is checked forquality and performance beforebeing processed and formatted intoa stream of correction messages andwide area data for uplink to theLandStar satellites. The LandStarsatellites broadcast RTCM messagetypes 1 and 2 to users.

Redundancy of equipment andcommunication datalines togetherwith continuous 24 hour monitoringensures the quality, reliability andintegrity of the system.

3.4.2 Satellite based Landstar System (RTS)


The LandStar service is subject to aservice charge which varies fromcountry to country. The end user isrequired to complete a SubscriptionAgreement before the service can beactivated.

For more information, usersare referred to the LandStarWWW site: www.thales-landstar.com

The GS50 / GS50+ has a defaultconfiguration set to be used for theLandStar service. After installing theReal-Time Satellite (RTS) module,choose the RACAL configuration setfrom the DATA COLL/Begin panel.By default, the unit will begin to trackLandStar satellite signals using anautomatic search algorithm. You canmanually tune the RTS module bypressing the CONFIG key andchoosing the Interfaces option. F5CTRL will allow you to manuallyenter the RACAL satellite frequencyyou wish to track.

3.4.2 Satellite based Landstar System (RTS), contd.

Your Leica GS50+ is capable to workas a RTK system. For the use ofRTK system you need an additionalRadio that receives online correctionsignals from a Reference station.Note that only the GS50+ can workas a RTK system because of its dualfrequency capability. To set up yourGS50+ as a RTK system pleaserefer to the System 500 technicalreference Manual that will guide youthrough the configuration.

To change the pre-transformation ofdatum to the given datum of thepublic reference system open theCONFIGURATION / Racal panel andselect the right Transformation.


5. Select the port you wish to use.(most likely 2)

In addition to Data Collection andNavigation, the GS50 / GS50+comes with additional applications.

Determine Coord System:Configure custom datums by defin-ing ellipsoids, projection and trans-formations.

Feature Management:View, edit and delete collected datathrough a graphical and tabularinterface.

Calculator:A fully functional RPN calculator.

3.6 GIS Application

6. A list of devices is available bychoosing F5.

For data that cannot be locateddirectly, the GS50 / GS50+ offersoffset alternatives including the useof Laser Range Finders.

Configuring the Data Port

To configure the GS50 / GS50+ foran Offset Interface, press the Configbutton:

1. Select choice 4 , "Interfaces"2. Select choice 5 "Offset"3. Select F3 "EDIT"4. Toggle USE DEVICE: YES

3.5 Offset Interface Options


Compute tolerances according anEC guideline for farming:Areas of land can be measured andcoded. The perimeter and size of thisarea can then be computed and ifrequired, this information can bewritten to a customisable log file. Thetolerance according an EC guidelinefor farming is computed. New pointscan be added to or deleted from thisarea. A graphical plot of the area canalso be viewed.

Superior graphical segmentationof areas:An area can then be divided into twosmaller areas if needed. The usercan specify the ratio of the division ofthe two areas and navigate to thepoints which divide the area if re-quired. Different attributes can beattached to the original area as wellas for the segments.

For more informationplease contact you localdealer.

3.7.1 Max Trak

Max Trak mode allows the sensor tocontinue to track satellites evenunder the most difficult conditions -such as tree cover.To change between Max Trak andMax Accuracy Press the CONFIGkey change to 1 Data Collection andselect 2 Satellite.

Once the MaxTrak mode is selected,the satellite icon on the TR500 willchange to show that MaxTrak isactive.

3.7 Special Features

COGO:Coordinate Geometry functionincluding inversing, traversing,intersections, offsets and arcs.

For more information onthese applications, pleaserefer to the System 500Tech Ref. Manual.

Cultivated Field Control:Optional at cost, please contact yourlocal dealer.

Support optimised area measure-ment and area log file:This application has been developedin order to measure the perimeterlengths and areas of fields or anyother parcel of land.


Using the auto stop and thresholdsetting provided in the configuration,collection can not only be monitoredby accuracy, but driven by it.

Using Auto stop, the GS50 / GS50+can automatically log a point when itmeets with user defined conditions.Those most applicable to GIS in-clude:• Accuracy: Define the horizontal

and vertical tolerance.

• Positions: Define the number ofcollection epochs.

Threshold settings allow for addi-tional coordinate quality checks to beperformed for static points or kin-ematic lines and areas:• Monitor the horizontal, vertical or

3D tolerance for points and verti-ces. No more zingers!

• For those post-process users, theDOP mask will ensure autono-mous collection as well.

3.7.2 Auto Stop and Threshold Settings

A hot-key can be configured toswitch between MaxTrak andMaxAccuracy track-mode with onebutton opera-tion.Additionally the Loss of Lock signalcan be turned on and off in thispanel.

It is not possible to importphase data into SKI-Pro Wizard thathas been collected when theMaxTrak was selected. Only codesolutions can then be computed inpost-processing. It is recommendedthat care should be taken when post-processing data that was collectedwhen MaxTrak was active.


3.8 Processing Data In The GIS DataPRO Software

To import and process the dataproceed as follows:

Switch on the computer, start Win-dows, start GIS DataPRO.

• Process the data

Use the SKI-Pro wizard to processany data not collected with real timedifferential. If your job includes datacollected both with and without realtime differential, the SKI-Pro Wizardwill automatically identify and differ-entially correct non-corrected data.

After the data has been processed, itcan be edited and exported to yourGIS.

• Import the data

For each sensor you must import thedata into GIS DataPRO Office.

Select "Import File" from the toolbar.Follow the instructions that appearon the screen.

You may wish to create a newproject before storing the data on thePC.

The data is then read by GISDataPRO and copied to the projectdatabase.

Repeat the import process for eachsensor that was involved in thefieldwork of your project.


4. Care and TransportTransport

When dispatching theinstrument, always use the

complete original Leica Geosystemspackaging (case and cardboardbox).

Never carry the instrument loose in aroad vehicle. It can be affected byshock and vibration. Always carry itin its case and secure it.

When transporting the instrument byrail, air or ship, always use thecomplete original packaging (caseand cardboard box), or its equiva-lent, to protect it against shock andvibration.

Storage

Temperature limitsRespect the temperature

limits (-40°C to +70°C / -40°F to+158°F) when storing the instrument,particularly in summer if the instru-ment is inside a vehicle.

Damp instruments must beunpacked. Dry the instru-

ment, the case, the foam inserts andthe accessories at not more than40°C / 108°F and clean them. Do notrepack until everything is completelydry.

Care and Transport

Cleaning and drying

Use only a clean, soft, lint-free cloth for cleaning. If

necessary, moisten the cloth withpure alcohol.

Use no other liquids; these mayattack the polymer components.

Cables and plugsKeep plugs clean and dry.

Blow away any dirt lodged in theplugs of the connecting cables.Unplugging connecting cables orremoving the PCMCIA card duringthe measurement may cause loss ofdata. Always switch off the instru-ment before removing the cables orthe PCMCIA card.

49GS50 / GS50+-4.0.0en Technical Specifications

5. Technical SpecificationsThe Technical Specifications for Leica Geosystems GPSequipment are contained on the following pages.

5.1 GS50 / GS50+ Tracking Characteristics

GS50Satellite Reception: Single frequency

Receiver channels: 12 L1 continuous tracking

L1 Carrier Tracking: Reconstructed carrier phasevia C/A code

L1 Code Measurements: Carrier phase smoothed C/Anarrow code measurements.

Satellites tracked: Up to 12 simultaneously

Time to first phase measurement typically 30 seconds.

GS50+Satellite Reception: Dual frequency

Receiver channels: 12 L1, 12 L2 continuous tracking

Code and Phase Tracking: Tracks the L1 C/A Code andL2 P-code to reconstruct

the carrier phase.

When Anti Spoofing (A-S) is activated the receiverswitches to a patented P-code aided tracking techniquethat provides full L2 carrier measurements and L2pseudoranges.

Satellites tracked: Up to 12 simultaneously.

Time to first phase measurement typically 30 seconds.

50Technical Specifications GS50 / GS50+-4.0.0en

5.5 Environmental Specifications

Humidity: Up to 95 % non-condensingWeather: Will withstand rain, snow, dust, sand, etc.

Instrument Operation StorageGS50 / GS50+ -20°C to +55°C -40°C to +70°CAT501 / AT502 -40°C to +75°C -40°C to +75°CRTB Antenna -30°C to +70°C -40°C to +80°CRTB Module -20°C to +70°C -40°C to +85°CLeica PC-Cards,all sizes -20°C to +70°C -40°C to +75°C

Optional internalmemory -20°C to +55°C -40°C to +70°C

Antennas

5.2 GPS Antennas

AT501Microstrip L1 antenna with built in groundplane.

AT502L1 / L2 dual frequency antenna with build in groundplane.

5.3 Equipment WeightsSensorsGS50: 1.15 kgGS50+: 1.25 kg

AT501 /AT502: 0.4kg

5.4 PowerPower consumptionGS50: maximum 5.5 WattsGS50+:: GS50+: maximum 7 Watts

(excluding radio)Supply VoltageAll equipment: Nominal 12V DC

(Range 11-16V DC)

51GS50 / GS50+-4.0.0en Technical Specifications

5.7 Baseline Precision

The following specifications are based on measurementsprocessed using GIS DataPRO software and are givenas baseline rms (root mean square).

Baseline precision is dependent upon variousfactors including the number of satellites tracked,

constellation geometry, observation time, ephemerisaccuracy, ionospheric disturbance, multipath and re-solved ambiguities.

Operation Code Code + Phase

Static 30 cm 1 cm

Kinematic 30 cm 1 cm

5.6 Separation Distances

GS50 / GS50+ AT501 / AT502 Antenna

Supplied cables: 1.2m or 2.8mOptional Cable: 30m

Longer cables available on request.

Leica Geosystems AGCH-9435 Heerbrugg

(Switzerland)Phone +41 71 727 31 31

Fax +41 71 727 46 73www.leica-geosystems.com

Printed in Switzerland - Copyright LeicaGeosystems AG, Heerbrugg, Switzerland 2002Original text

667267-4.0.0en

Leica Geosystems AG, Heerbrugg,Switzerland has been certified as beingequipped with a quality system which meetsthe International Standards of QualityManagement and Quality Systems (ISOstandard 9001) and EnvironmentalManagement Systems (ISO standard 14001).

Total Quality Management -Our commitment to total customersatisfaction

Ask your local Leica Geosystems agent for moreinformation about our TQM program.

Documents

LEICA GS50 - Newegg · terminal and antenna. This is used in the field to collect and record spatial (position) and non-spatial attributes. After the data is collected in the field,