Topcon HiPer II With FC-236 in a Real Time Network

7/23/2019 Topcon HiPer II With FC-236 in a Real Time Network

http://slidepdf.com/reader/full/topcon-hiper-ii-with-fc-236-in-a-real-time-network 1/34

Topcon HiPer II with FC-236 in a Real Time Network

Oscar R. Cantu’

June 2011



June 2011

Webinar Outline• Requisites for connecting to a Real Time Network (RTN),

review

• Internet connection options for an FC-236 field controller• Creating a supporting Survey Configuration in TopSURV

• Connecting to a Real Time GNSS Network

• Getting the rover receiver into a Fixed solution




June 2011

Power UP

Ensure that both

Bluetooth and the

internal Phone isturned on

Start Surfing

Within the FC-236

controller, go to Start

>> Internet Explorerand establish an

active connection to

the internet.

Field Software

Launch TopSURV

and use a custom

SurveyConfiguration with

Real Time Network

settings.

Rover Connect

Establish a wireless

Bluetooth

connection betweenthe FC-236

controller and the

HiPer II receiver

Production

Get the rover

receiver into a Fixed

solution type.

The Big Idea




June 2011

Requisites for connecting to a Real Time Network


• Using a Real Time GNSS Network (RTN) is a powerful and efficient way to accomplish our field work. To

connect with our rover receiver, we only need three things:

– A hosting Real Time GNSS Network

– An active internet connection via our cellular network coverage

– Satellites up above

• Let’s begin with getting the FC-236 field controller on the internet..

Real Time GNSS Network Cellular Network Coverage GNSS Satellites



June 2011

Internet connection options for an FC-236 field controller


• First, begin by ensuring that the FC-236 field controller’s internal phone (modem) is powered on.

This is verified from the Windows Mobile desktop screen.

• Simply tap the, “Phone off” message and then tap the ghosted gray Phone button to turn the

internal modem on.

• For this example, the controller’s Windows Mobile operating system has recognized that the SIM

card used is an AT&T SIM card. ..helpful!



June 2011



• A custom WorkFlow with instructions for SIM card installation and internet connection settings is available

from the Topcon University website:

• To access, log in to the website and go to:

http://www.topconuniversity.com/

WorkFlow: Topcon FC-236 SIM Card Installation and

Internet Connection

Hardware » Field Controllers » FC-236 » Manuals



June 2011



• Next, we need to declare internet dial up commands for the SIM card within the FC-236 controller. This will

only need to be done once per controller.

• With the SIM inserted and the FC-236 controller’s internal phone (modem) powered on, go to Start >>

Settings >> Connections (tab) >> Connections (icon) to begin the process. Select the Add a new

modem connection option. Ensure to declare the Cellu lar Line (GPRS) option.

• Windows Mobile operating system will need to know the Access Point Name (APN) for your SIM card’s

cellular provider.



June 2011



• Windows Mobile operating system within your Topcon FC-236 field controller

needs three pieces of information to establish an internet connection using it's

internal GSM modem:

– Access Point Name (APN) – User Name

– Password

• These three pieces of information will vary depending on your cellular provider

and (sometimes) your physical location.

• However, the Domain for all of them is intentionally left blank.

• Please reference the Topcon University website for a convenient listing of these

settings in, WorkFlow: Topcon FC-236 SIM Card Installation and Internet

Connection .



June 2011



• Let’s test our work. From the Windows Mobile desktop, go to Start >> Internet Explorer . This will have

the FC-236’s operating system use the internet connection commands that you just declared.

• Something simple. Within Internet Explorer on the FC-236, go to:

www.google.com

• It is normal to see a pop up balloon message of Connecting to GPRS showing activity.



June 2011



• Done. Your FC-236 field controller is now actively on the internet using it’s internal modem.

• The next task will be to have TopSURV field software use this active internet connection to stream ourcorrection data while we are working within a Real Time GNSS Network. This is done within a custom

Survey Configuration.

• Here is how..

Real Time GNSS Network Cellular Network Coverage GNSS Satellites

Done



June 2011


Questions?



June 2011

Power UP

Ensure that both

Bluetooth and the

internal Phone is

turned on

Start Surfing

Go to Start >>

Internet Explorer to

establish an active

connection to the

internet.

Field Software

Launch TopSURV

and use a custom

Survey

Configuration with

Real Time Network

settings.

Rover Connect


Bluetooth

connection between

the FC-236

controller and the

HiPer II receiver

Production

Get the rover


solution type.

The Big Idea




June 2011

Custom Survey Configuration in TopSURV


• With the FC-236 field controller actively on the internet using it’s internal modem, let’s create a new

TopSURV field job and create a custom Survey Configuration to support connecting to our local Real Time

GNSS Network.

• Within the Survey Configuration screen, we’ll tap the triple dot button within the GPS+ Configuration

section to see a listing of configuration templates.



June 2011



• Within the Configuration Name, is a list of templates that you can begin with. Select the My Network RTK

configuration and tap the Edit button to begin the process.

• It is common to rename the Survey Configuration to support our specific hardware (HiPer II) and what we

are doing (Network usage as compared to base and rover RTK). User preference.

• The configuration type is Network RTK. For this example, the Corrections type is VRS and our static file

Post Processing checkbox is left off. ..project specific choice.



June 2011



• The Rover Receiver screen is pretty straight forward. However, the Modem Connect option offers the

opportunity to declare if you are using the modem within your HiPer II receiver or the one within the FC-236

field controller.

• It is common to use the Modem Connect option of Controller for faster internet connections and benefit of

the field controller simply being on the internet (Google Maps, E-Mail, weather, etc).

• Within the Network Type pull down menu, we will select the Existing Network Connection option to

support the fact that prior to launching TopSURV field software, we opened an Internet Explorer browser

and had the controller’s Windows Mobile operating system establish an internet connection first. ..makessense!



June 2011



• The hosting server for your local Real Time GNSS Network can be access / called either by entering it’s

Internet Protocol (IP) Address and Port Number separated by a colon (shown above) or, when applicable,

via a web address. Tap the Add New button when done.

• Credentials. Your unique User Identification and Password is issued to you by your Real Time GNSS

Network manager.

• It is common to declare that your Virtual Radio Port is automatically handled by TopSURV field software.

Topcon NET-G3A



June 2011



• That’s it! ..remaining Survey Configuration settings are user preference. Shown above are commonly used

options.

• Satellite System. If the Real Time GNSS Network that you are being hosted by does not track and use both

GPS and GLONASS satellites, then you will want to declare so in this pull down menu.



June 2011



• When done, tap the green check to finish creating a custom Survey Configuration to supporting using a

HiPer II receiver within a Real Time GNSS Network.

• Data Entry Recall. TopSURV will use this custom Survey Configuration for sequential field jobs until you

declare otherwise.



June 2011


Questions?



June 2011

Power UP

Ensure that both

Bluetooth and the

internal Phone is

turned on

Start Surfing

Go to Start >>


establish an active

connection to theinternet.

Field Software

Launch TopSURV

and use a custom

Survey

Configuration withReal Time Network

settings.

Rover Connect


Bluetooth

connection between

the FC-236controller and the

HiPer II receiver

Production

Get the rover


solution type.

The Big Idea




June 2011

Connecting to a Real Time GNSS Network


• With the custom GPS Survey Configuration declared and Bluetooth checkbox checked on, tap the Connect

button to see a listing of wireless devices (your HiPer II receiver) to select from.



June 2011

Connecting to a Real Time GNSS Network


• Recall, for this example, that the internal modem (phone) within the FC-236 is already actively on the

internet. Therefore, the Connections wizard goes quickly.

• You will see a listing of Mount Points that you can select from and connect to.

• Different networks offer different correction services. ..Differential GPS (DGPS), Real Time Kinematic

(RTK), Modeled Reference Station (MRS), etc.

A Mount Point l ist ing can be

thought of like Fitness Center



June 2011

Real Time Kinematic (RTK) or Single Base


• The Real Time GNSS Network server is centrally communicating (constantly) to all reference stations.

• As a rover, you select from the Mount Point listing which correction service (DGPS, RTK, MRS, etc) that

you want and in what format (RTCM version 3.x) that you want it in.

• Next, the rover will send it’s NTRIP User Name and Password credentials to the server.

• Once approved, the server will immediately send corrections from either a user selectable / specific

reference station or simply the reference station that is closest to you at the time.

RTN Server



June 2011

NETwork RTK (virtual base station)


• Raw GNSS data from each reference station is transferred via an internet connection to a central

processing server commonly running TopNET-V real time network software.

• Topcon network server software TopNET-V uses data from multiple reference stations in real-time to create

VBS (Virtual Base Station) positions.

• ..but how?

Known

Position

Known

Position

Known

Position

Known

Position



June 2011



• Remember how a base and rover RTK system works? The mobile base receiver is setup and broadcasting

corrections from a good ole 35 watt base radio. The rover listens and uses corrections sent from the 35

watt base radio. The rover then “solves ambiguities” and gets into a Fixed solution. ..been around fordecades.

• Very similar to that is the TopNET-V modeling engine. TopNET resolves integer ambiguities of baselines

between reference stations (just like a rover) for the purpose of estimating ionospheric (dispersive) and

tropospheric (non-dispersive) models above and across the network.

• Meaning, the Real Time GNSS Network itself is “solved for” and in a Fixed solution at all times.



June 2011



• It then restores the same components at a location near the rover receiver to obtain virtual (or predicted)

data.

• The predicted data is then sent to the network rover receiver in an RTCM correction message format.

Virtual Base Station



June 2011

Correction Data Format Bandwidth Used

RTCM version 2.3 (older) 354 bytes per second

CMR+ (still around) 178 bytes per second

RTCM version 3.x (modern) 139 bytes per second

Correction Data Formats, RTCM 3.x versus CMR+


• The open format of RTCM v3.x uses less bandwidth.

• Therefore, when selecting from a Real Time GNSS Network’s Mount Point listing, it is recommended and

common to always use RTCM version 3.x if offered.



June 2011


Questions?



June 2011

Power UP

Ensure that both

Bluetooth and the

internal Phone is

turned on

Start Surfing

Go to Start >>


establish an active


Field Software

Launch TopSURV

and use a custom

Survey


settings.

Rover Connect


Bluetooth

connection between


HiPer II receiver

Production

Get the rover


solution type.

The Big Idea




June 2011

Getting the rover receiver into a Fixed solution


• Go to Setup >> Status to see the current “status” of the rover receiver.

• Tap the System tab to see more information.



June 2011

Getting the rover receiver into a Fixed solution


• Sometimes, when you initially come to this screen, the rover receiver will be in a Float (hasn’t solved all of

the math yet) solution type.

• To help things along, it is common to tap the Topcon logo / context menu button and select the Reset RTKoption.

• For the network rover receiver to achieve a Fixed (solved all of the math and read to work) solution type, we

are looking to have 100% Radio Link and 5 or more Initialized Satellites.



June 2011


Questions?



June 2011

Power UP

Ensure that both

Bluetooth and the

internal Phone is

turned on

Start Surfing

Go to Start >>


establish an active


Field Software

Launch TopSURV

and use a custom

Survey


settings.

Rover Connect


Bluetooth

connection between


HiPer II receiver

Production

Get the rover


solution type.

The Big Idea




Topcon HiPer II with FC-236 in a Real Time

Network

June 2011

Documents

Topcon HiPer II With FC-236 in a Real Time Network