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Azimuth and elevation are angles used here to define the
position of a satellite in the sky relative to the vehicle.
The azimuth angle is the compass bearing on the horizon,
relative to true north, of a point directly beneath a satellite.
Compass bearings are measured clockwise in degrees
from north. Azimuth angles range from 0 ° (north) through
90 ° (east), 180 ° (south), 270 ° (west), and back to 360 °
(north again).
In the illustration shown, the vehicle is located at the cen-
ter green circle. A satellite with an azimuth angle of 207 °
is currently located 207 ° from north in a clockwise direc-
tion relative to the vehicle.
The elevation angle of a satellite, also called altitude, is
determined by first finding the compass bearing on the
horizon relative to true north, and then measuring the an-
gle between that point and the satellite relative to the vehi-
cle. Elevation angles for objects above the horizon range
from 207 ° (on the horizon) up to 90 ° (at the zenith).
The more reliable satellites (1) will always be the satellites
closest to vehicle at the center point of the map. They are
the satellites that are at higher elevations relative to the
vehicle. The higher elevation means that the satellites will
remain useful for a longer period of time because their sig-
nal is less likely to degrade from atmospheric conditions
and ground clutter.
The screen also reports the average Horizontal Dilution
Of Precision (HDOP) and Position Dilution Of Precision
(PDOP) for all tracked satellites (2).
When OmniSTAR RTX correction is in use, Global Or-
biting Navigation Satellite System (GLONASS) satellites
also appear on the "Constellation Map" screen.
GLONASS satellites are identified with the letter "G" after
the satellite number. In this example, "5G" is a GLONASS
satellite.
NOTE: RTX correction is only supported on AFS 372 re-
ceivers.
3 - SETUP
3-96
4
RCIL11DSP008ABG
5
RCIL11DSP009ABG
6
RAIL12DSP1425BA
7
RAIL12DSP1426BA
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