2 ms·
Other limitations in GNSS accuracy are that the satellite clocks drift and that the orbits are not perfectly know in real time. GNSS operators regularly publish
by fsh 4y ago
Other limitations in GNSS accuracy are that the satellite clocks drift and that the orbits are not perfectly know in real time. GNSS operators regularly publish correction files for the clock and orbits. This allows post-correcting the recorded data a few days after recording. Atmospheric effects are calculated and corrected for by using dual-band receivers (usually L1 + L2 for professional gear). The ultimate accuracy of such a post-corrected measurement is a few mm after a few minutes of averaging.
- ChrisLomont 4y agoL1 and L2 can post correct ionosphere noise, as they travel differently there. They cannot post correct troposphere differences because they travel the same there. Without RTK, which measures the time varying local errors, you cannot undo that error with current GNS systems. It's precisely this reason RTK was developed.