Which factor is not necessary to have a good network geometry in GNSS observations?

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Multiple Choice

Which factor is not necessary to have a good network geometry in GNSS observations?

In GNSS network design, the strength of the network geometry comes from how the stations are distributed and how well the observations tie to the satellites, not from whether the stations can see each other. Inter-visibility of stations isn’t needed because each receiver independently tracks satellites and uses those satellite observations to solve for positions. Even if stations cannot see one another due to terrain or obstacles, the network can still have good geometric strength as long as each station has a clear view of enough satellites and the baselines are well distributed around the area. What does matter is that the ground is stable so points don’t move during observations, and that the equipment used can capture precise measurements and maintain reliable tracking. Spreading control points out over a reasonable area helps avoid geometric clustering and improves the conditioning of the network, though the exact minimum distance isn’t a hard rule. So inter-visibility of stations isn’t required for good GNSS network geometry, whereas sky visibility, stability, measurement quality, and well-distributed baselines are what truly influence it.

In GNSS network design, the strength of the network geometry comes from how the stations are distributed and how well the observations tie to the satellites, not from whether the stations can see each other. Inter-visibility of stations isn’t needed because each receiver independently tracks satellites and uses those satellite observations to solve for positions. Even if stations cannot see one another due to terrain or obstacles, the network can still have good geometric strength as long as each station has a clear view of enough satellites and the baselines are well distributed around the area.

What does matter is that the ground is stable so points don’t move during observations, and that the equipment used can capture precise measurements and maintain reliable tracking. Spreading control points out over a reasonable area helps avoid geometric clustering and improves the conditioning of the network, though the exact minimum distance isn’t a hard rule. So inter-visibility of stations isn’t required for good GNSS network geometry, whereas sky visibility, stability, measurement quality, and well-distributed baselines are what truly influence it.

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