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GPS: Global Positioning System. Wildlife Management 20/30. The History of GPS. Feasibility studies begun in 1960’s. Pentagon appropriates funding in 1973. First satellite launched in 1978. System declared fully operational in April, 1995. - PowerPoint PPT Presentation
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GPS:Global
Positioning System
Wildlife Management 20/30
Feasibility studies begun in 1960’s. Pentagon appropriates funding in 1973. First satellite launched in 1978. System declared fully operational in April, 1995.
The History of GPS
How do you use these satellites to calculate your position?
The Global Positioning System is a constellation of 31 satellites that is used to calculate your position.
Control Segment
Space Segment
User Segment
Three Segments of the GPS
Monitor Stations
GroundAntennas
Master Station
Kwajalein Atoll
US Space Command
Control Segment
Hawaii
Ascension Is.
Diego Garcia
Cape Canaveral
Ground AntennaMaster Control StationMonitor Station
Control Segment
Space Segment
User Segment
Three Segments of the GPS
Monitor Stations
GroundAntennas
Master Station
Space Segment
Control Segment
Space Segment
User Segment
Three Segments of the GPS
Monitor Stations
GroundAntennas
Master Station
Military. Search and rescue. Disaster relief. Surveying. Marine, aeronautical and terrestrial navigation. Remote controlled vehicle and robot guidance. Satellite positioning and tracking. Shipping. Geographic Information Systems (GIS). Recreation.
User Segment
Position is Based on Time
T + 3Distance between satellite and receiver = “3 times the speed of light”
T
Signal leaves satellite at time “T”
Signal is picked up by the receiver at time “T + 3”
Sources of Signal Interference
Earth’s Atmosphere
Solid Structures
Metal
Electro-magnetic Fields
Waypoint A waypoint is based on coordinates entered into a GPS
receiver’s memory. It can be either a saved position fix, or user entered
coordinates. It can be created for any remote point on earth. It must have a receiver designated code or number, or
a user supplied name. Once entered and saved, a waypoint remains
unchanged in the receiver’s memory until edited or deleted.
Getting Started…• 5 buttons:
o Powero Page (also the “back” function)o Entero Upo Down
Getting Started…• Power the GPS on: Hold the Power Button
• It will prompt you if you are indoors, select: YES by pressing the up/down and enter keys.
• Keep selecting the “Page” button until you get to the MENU screen. You know you’re there when the following options are shown:o Marko Waypointso Routeso Trackso Setup
Getting Started…• Scroll down to Mark, and select it with the Enter
key.
• It will prompt you to Mark Waypoint, before you select YES with the Enter key, use the UP arrow to the Number: 001 Change this to the title school. Once that is titled, scroll down to highlight the OK and select it with your Enter key.
• Write down the Elevation:• Write down your bearing:
o N__*__.___`o W___*__.___`
Marking Way Points• You and a partner are going to mark Way Points. • Head to the M and mark the Way Point as M. • Head to the closet field goal post on the football
field and mark the Way Point as Post.• Head to the water tower and mark the Way Point
as Blue.
• **It is critical that you label your Way Points!!!**
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