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GPS Overview Appendix G
SUPERSTAR II User Manual Rev 3 71
Figure 24: Example of Differential Positioning
G.3.2 Static vs. Kinematic Positioning
Static and kinematic positioning refer to whether a GPS receiver is stationary or in motion while collecting
GPS data.
G.3.3 Real-time vs. Post-mission Data Processing
Real-time or post-mission data processing refer to whether the GPS data collected by the receiver is processed
as it is received or after the entire data-collection session is complete.
G.4 M ul tipa th
Multipath signal reception is one of the most plaguing problems that detracts from the accuracy potential of
GPS pseudorange differential positioning systems. This section will provide a brief look at the problems of
multipath reception and some solutions.
Multipath occurs when an RF signal arrives at the receiving antenna from more than one propagation route
(multiple propagation paths), see Figure 25 on Page 72.
Rover station
GPS antenna
Base station
Radio
TX
GPS
RX
Radio
RX
GPS
RX
Differential
data
GPS satellites
GPS antenna
(shown with
choke-ring ground plane)
User with hand-held
computer