Precise orbit determination provides performances that are not currently achievable with GNSS systems. I cannot find information of the reason for this. I imagine different possibilities:
- Use of measurements not available for GNSS such as lasers
- Use of precise postprocessed ephemeria
- Use of more data (as it not done as a real time implementation)
Are there any references for this subject? I’ve found papers describing each method but not comparing them for the same user case.