A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Robert VanderPol II
Date: 2018 Nov 11, 22:42 -0800
Using the satellites in orbit depends on sufficient radio energy being radiated at the surface. That is energy needing to be budgeted for. No satellite will broadcast sufficient energy towards the surface unless it is communicating with a lander of some sort and even then will depend on how directional an antenna it uses. If you want to use satellites you will need to make arrangements for them which means trading or paying for broadcast time except for the occasional pass that happens to provide data.
INS drifts over time and needs updates. Speed will have an impact. Slow speeds mean slower drift but distance between needing updates is going tobe the same or worse. At low enough speed position can be updated weekly from whatever source.
Re: Celestial Navigation on the surface of Mars
From: John D. Howard
Date: 2018 Nov 10, 20:03 -0800