Reach instantaneous accuracy

I’ve read through a few forums here and it sounds like the Reach is pretty accurate when post processed. I am curious about the instantaneous accuracy, i.e. from reading to reading while a rover (in a base/rover setup) is moving. I have been researching solutions for an autonomous rover that can navigate accurately around the outside of residential homes. It sounds like I could potentially have issues “seeing” satellites due to surrounding structures (house, sheds, playsets, barns, woods, etc.) and that this can drastically affect accuracy. So a few questions that hopefully you can help me understand.

  1. What is the instantaneous accuracy of the reach in a base/rover setup?
  2. What should I expect for the average error in accuracy?
  3. How detrimental are surrounding structures to getting and maintaining a good fix?

I don’t know if I’m experienced enough to answer your questions fully but I will say a few things since no one has responded yet.

The instantaneous accuracy when in RTK mode can be varied depending if you have a float solution or actually getting a fix. I’ve included three links below to other posts with real world results. The one seemed to get 2cm accuracy during “fix” and about 20cm accuracy during “float”. It also takes some time to get to this accuracy. I think you must be away from any structures to ever get a fix. I tried near my house for a few days but never got a fix until I went out in a field. Remember, base and rover must have SNR levels above 45 to at least 5 satellites at the same time to get a fix. Having your rover on the ground will also make it harder. I assume you can put a base station up high, such as on a pole or a building. Even your location on the planet, time of day and the weather can impact your results. Something that would need to be tested is what accuracy can you get if a rover can first get a fix in a more open area and then it moves near a structure. I’ll see if I can get time to try this.


Luke also made a comparison between real-time and postprocessed solutions here:

I’ll be looking forward to the results. Have fun!