[H-GEN] Real Time Kinematic positioning
Russell Stuart
russell-humbug at stuart.id.au
Sun Aug 13 13:16:10 AEST 2017
Ray brought some gear to Humbug that achieved 1cm relative accuracy
using GPS and some rather special algorithms. These some, err,
scepticism about the accuracy claims. It's all explained on Wikipedia:
https://en.wikipedia.org/wiki/Real_Time_Kinematic
The hardware needed to pull off this magic isn't your grandfathers GPS,
but nonetheless it not too expensive either:
http://navspark.mybigcommerce.com/ns-hp-bd-gps-bds-rtk-receiver
The algorithms needed to extrapolate from the carrier wave phase (the
carrier wave is about 20cm long) seen from each satellite as reported
by that chip to sub centimetre position have now been implemented as an
open source library (and it's very, very well done):
https://github.com/tomojitakasu/RTKLIB/tree/master/app/rtknavi
Getting that library running is what we were doing last night.
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