4 ms·
> They've been available "to the public" (ie. non military) for 30 odd years .. it's just the components have been expensive and have required "some technical e
by dilyevsky 3y ago
> They've been available "to the public" (ie. non military) for 30 odd years .. it's just the components have been expensive and have required "some technical expertise" to glue it all together.
That is not what gps.gov says - only since 2014
https://www.gps.gov/systems/gps/modernization/civilsignals/#L2C https://www.gps.gov/systems/gps/modernization/civilsignals/#...
- defrost 3y agoThis: https://learn.sparkfun.com/tutorials/what-is-gps-rtk https://learn.sparkfun.com/tutorials/what-is-gps-rtk base + roving receiver pairs, has always been an option for 30 odd years - it's what gives the increased accuracy. L2C achieves ionospheric (and other) correction by another "dual" approach - dual frequencies, this has only recently been available. All the same, as I stated, non US military, non US companies have been using twin receivers to improve US GPS accuracy for 30 odd years. It was used here: https://www.mrd.gov.fj/index.php/31-products/58-regional-airborne-magnetic-and-radiometric-data https://www.mrd.gov.fj/index.php/31-products/58-regional-air... for example, 26 years ago.