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by minetest2048
50 days ago
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You can go into a really deep rabbit hole thinking about those questions.. this page explains the design decisions behind LunaNet AFS navigation signal: https://insidegnss.com/the-augmented-forward-signal-afs-defi... Some considerations: - They don't use GPS frequencies because there is receiver on the moon that receives GPS L1 signals (LuGRE and potentially more in the future) - Make it easy to acquire for low complexity hardware - Use 5G forward error correction code to reuse existing hardware implementation - Design the signal in a way so that the user can easily find start of a data frame And those are RF level considerations... there will be more considerations needed for the data transmitted over those navigation signal that the receivers need to use to determine navigation satellite position as lunar orbit is much more complicated than Earth orbit |
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