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Exact(5)
The minimum elevation angle used was 20°.
The Earth station is 10° in the minimum elevation angle to maximize the coverage area of satellites.
Many parameters have to be taken into account in designing an LEO satellite constellation including transmission delay, service coverage, minimum elevation angle, and the effects of space radiation.
Changing the GPS data rate from 0.1 to 1 Hz slightly decreases the minimum elevation angle for all satellites in flight direction.
In flight direction, the minimum elevation angle is a few degrees larger than expected from the FoV setting, while in aft direction, this angle is a few degrees lower.
Similar(55)
As expected, increasing the FoV decreases the minimum elevation angles.
Users also benefit from their very high average and minimum elevation angles, resulting in minimum signal attenuation.
There are several distinct changes in these minimum elevation angles, which are related to changes in the GPS receiver settings.
Fig. 2 Daily minimum elevation angles in the GPS antenna frame in flight (top panel) and aft (bottom panel) direction for each Swarm satellite.
To obtain the minimum elevation angles in flight direction shown in Fig. 2, all observations with azimuth angles between 350° and 10° are used, while the aft direction contains all observations between 170° and 190°.
Figure 2 gives an overview of the daily minimum elevation angles of the GPS observations in the antenna-fixed frame for all Swarm satellites, in both flight direction and aft direction.
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