DPOS & Recording Intervals

[Kelly Bellis]

Does the Base Station recording interval need to match the Rover's ?

Say for example, when setting up the Base-Rover to begin an RTK session, the recording interval of the Base Station is set to record GNSS data at 30 seconds while the Rover will be recording its GNSS data with updates set at 5 Hz. Will the RTK data from the Rover be post processed by DPOS based entirely upon the recorded 30-second intervals of the Base? Or will the CORS data interval prevail and be used instead?

 

[Shawn Billings]

I keep base and rover set to record at 1 Hz. Note that recording rate and correction rate (broadcast period) are two different things.

 

[Kelly Bellis]

Thanks Shawn. So just to confirm, you're saying Yes, they ideally should match - is this correct?

What happens when they don't match?

 

[Shawn Billings]

DPOS does not interpolate as far as I know. Only synchronized epochs are processed, so only those epochs that might coincide (base and rover) would be processed. I actually (accidentally) saw some pretty impressive performance in our early tests when I recorded a base file at 10 and rover at 1. I collected data on a point 2.5 miles from the base for 60 seconds. Because of the mismatch I only had 6 epochs processed and it fixed properly. I wouldn't expect that every time, but I was impressed. But to answer your question, it's important for Hybrid RTK for the base and rover to match recording intervals.