3 ms·
In mid 90s I worked for a company that developed combined GPS/GLONASS receiver and aimed specifically at high-precision measurement market. With clever math mod
by eps 15y ago
In mid 90s I worked for a company that developed combined GPS/GLONASS receiver and aimed specifically at high-precision measurement market. With clever math modeling and by letting a receiver rest on one spot for longer periods of time, e.g. 30 min, they could get the precision down to 3 mm (millimeters). And that's without A-GPS, purely through oversampling of satellite data.
- omgtehlion 15y agoThat company was Javad, no?
- eps 15y agoIt was Javad's, but before Javad, the company.
- singular 15y agoIt's funny you mention that, as I swear the professor said it could be done to accuracy of mm, but after reviewing the wikipedia articles I had concluded I misremembered. Perhaps not...
- juiceandjuice 15y agoYou can, but you need to need to analyze the phase of the GPS signals at the analog level (not the the code phase)
- CamperBob 15y agoSo the carrier phase is derived from the Cs/Rb clocks on the satellites? That's pretty neat, if so.