Terrain Compensation - Novatel SMART2 Series Installation And Operation User Manual

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SMART2 Operation
The first field after the log header will be ENABLE to indicate the TerraStar subscription is valid.
The second field after the log header will be LOCKED to indicate the decoder is locked to the
data format.
To monitor the PPP convergence, request the PPPPOS log:
log ppppos ontime 1
[COM1]<PPPPOS COM1 0 76.0 FINESTEERING 1886 418465.000 00000020 ec34 13386 SOL_
COMPUTED PPP_CONVERGING 51.11679035745 -114.03886212905 1064.9475 -16.9000
WGS84 0.7097 0.6867 1.2333 "TSTR" 25.000 0.000 18 17 17 17 00 00 00 33
[COM1]

3.6 Terrain Compensation

The Terrain Compensation feature corrects for errors in position caused by the roll and pitch of
the vehicle. The SMART Antenna senses the vehicle's roll and pitch angle and, with the user-
entered "height above ground", compensates the position output to give the position under the
vehicle rather than at the antenna.
Vehicle motion is required to compute and obtain terrain-compensated positions.
As shown in Figure 6: Terrain Compensation – Roll below and Figure 7: Terrain Compensation –
Pitch on the next page, if a vehicle is operating on sloped terrain, the position will be in error by
an amount proportional to the roll or pitch angles.
SMART2 Installation and Operation Manual 1
Figure 6: Terrain Compensation – Roll
27

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