4 ms·
Geostationary satellites have very well known position and use atomic clocks to ensure they are synchronized. So when you get a signal for 3 geostationary sats
by ivalm 6y ago
Geostationary satellites have very well known position and use atomic clocks to ensure they are synchronized. So when you get a signal for 3 geostationary sats you can have both extreme precision in their position and in time delay between your and sat locations.
For LEO sats the sat position is more complicated and they don’t have atomic clocks to synchronize. Now, their position IS somewhat known and they do have clocks so they can work somewhat, just not as well (alternatively since there will be a ton of Leo sats maybe you can do statistical analysis to improve?)
- Denvercoder9 6y agoGNSS constellations do not use geostationary satellites.
- jhayward 6y ago> GNSS constellations do not use geostationary satellites. This is not quite accurate. The main body of GNSS constellations are usually MEO cut in to several orbital planes, but GPS and Beidou, (Global systems) as well as QZSS and IRNSS (regional systems) all have GEO satellites broadcasting a NAV signal payload.
- manquer 6y agoGNSS systems typically use MEO ~20,000 KM.
- Rebelgecko 6y agoYou can't really use geostationary satellites for finding your position (problem akin to gimbal lock, you lose an entire degree of freedom so you don't know if you're north or south)