Gps Flashcards
What does GPS stand for
Global Positioning System
What does UTM stand for?
Universal Transvers Mercator
What does DOP mean?
Dilution of precision
Is if the satellites get to close together and they start crowding each other
What are Datums
They are
Nad27 from 1927
Nad83 from 1983 most comely used
WG84 from 1984
What is multi pass?
The ability to be able to come back to the same tracks days even months later
What is selective avaliabilaty
It is ran by the us so weather the switch is on or off
What are the 3 WAAS satellites in use right know and where are they used
138- Western Canada BC
135- central Canada
133-eastern Canada
What is Ephemeris data?
It contains more detailed satellite orbit,clock corrections and other parameters
How many satellites mist a receiver hook to to get a accurate position ?
4
What is a GPS track?
A breadcrumb trail of points
What is a way point?
A single GPS location, marked with a GPS receiver
Are low DOP numbers better than high numbers?
Yes
6-20 poor dilution
0-6 good dilution
What Does WAAS stand for ?
Wide Area AugmentaionSystem
What does CDGPS
Canadian differential Global Positioning System
2-DNav=
3-Dnav=
2d-GPS
3D-dgps
