DGPS
The DGPS (Differential Geographic Positioning System) Survey
These
are surveys which are carried out using the differential GPS. It achieves
higher positional accuracy by making use of the differential capabilities of
two GPS antenna linked by a radio signal.
are surveys which are carried out using the differential GPS. It achieves
higher positional accuracy by making use of the differential capabilities of
two GPS antenna linked by a radio signal.
The DGPS Survey main
features are:
features are:
·
Position is determined by distance from at least 4 satellites
Position is determined by distance from at least 4 satellites
·
Time taken by signal to travel from satellite to antenna used to
determine the distance.
Time taken by signal to travel from satellite to antenna used to
determine the distance.
·
The base station calculates the difference between the specified
coordinates of its location and those indicated by the satellites.
The base station calculates the difference between the specified
coordinates of its location and those indicated by the satellites.
·
The base is continuously broadcasting a signal to the rover of
this difference.
The base is continuously broadcasting a signal to the rover of
this difference.
·
The rover then uses this same difference to accurately determine
it’s location.
The rover then uses this same difference to accurately determine
it’s location.
DGPS Advantages
·
Higher accuracy (+/-0.045m)
Higher accuracy (+/-0.045m)
·
Real time data
Real time data
·
Worldwide coverage
Worldwide coverage
·
3D survey results
3D survey results
·
24 hours availability
24 hours availability
·
Not affected by cloud cover
Not affected by cloud cover
DGPS Application
·
Topographic surveys
Topographic surveys
·
Control establishment and densification
Control establishment and densification
·
Positions, lines and levels setting-out
Positions, lines and levels setting-out
·
Azimuth determination
Azimuth determination
·
Collar pick-ups (X;Y;Z)
Collar pick-ups (X;Y;Z)
What is a differential
GPS?
GPS?
Differential Global Positioning System (DGPS)
is a method of providing differentialcorrections to a Global Positioning
System (GPS) receiver in order to improve the accuracy of the navigation
solution. DGPS corrections originate from a reference station
at a known location.
is a method of providing differentialcorrections to a Global Positioning
System (GPS) receiver in order to improve the accuracy of the navigation
solution. DGPS corrections originate from a reference station
at a known location.
What is a mapping GPS?
The global
positioning system (GPS) is a network of satellites that orbit
the earth and send a signal to GPS receivers and Navigation
devices, giving them the precise location, speed, and if you are in an aircraft
or up a mountain, altitude.
positioning system (GPS) is a network of satellites that orbit
the earth and send a signal to GPS receivers and Navigation
devices, giving them the precise location, speed, and if you are in an aircraft
or up a mountain, altitude.
How accurate is the
GPS?
GPS?
The United States
government currently claims 4 meter RMS (7.8 meter 95% Confidence Interval)
horizontal accuracy for civilian (SPS) GPS.
Vertical accuracy is worse. Mind you, that’s the minimum. Some
devices/locations reliably (95% of the time or better) can get 3 meter accuracy.
government currently claims 4 meter RMS (7.8 meter 95% Confidence Interval)
horizontal accuracy for civilian (SPS) GPS.
Vertical accuracy is worse. Mind you, that’s the minimum. Some
devices/locations reliably (95% of the time or better) can get 3 meter accuracy.
google-site-verification=2j8Us0psP3GGjD12h0fH6_Z08_sRyWQjNbWcaMV4E9A