Sorry for asking again. I'm just wondering about a fundamental configuration decision. My configuration idea is to have two low cost GPS receivers, where one of them is on a known position. Both issue just GPS position and log time data Is it enough to process just position and log time data (NMEA) from base station as input to a tool like RTKlib (online or postprocessing)? Or is DGPS really only possible with GPS receivers (at base station) which output ephemerides etc.?
Yours, Stefan P.S. To Dan: Which inertia motion sensor and software did you (and and typical Autopilots) use to do this sort of dead reckoning? 2011/2/4 Dirk-Willem van Gulik <[email protected]>: > > On 4 Feb 2011, at 15:52, Dan Lyke wrote: > >> On Fri, 4 Feb 2011 16:17:09 +0100 Stefan Keller <[email protected]> wrote: > >>> Now given that mobile phones can be connected to low-cost GPS (e.g. >>> via bluetooth) it should be possible to implement at a "consumer DGPS" >>> which gets an accurracy of 2m or better. >> .. >> Some of those low-cost consumer grade devices already integrate SBAS >> (Space-Based Augmentations Services) correction like WAAS, EGNOS and >> MSAS, which can put them close to 2m. These systems work by having a >> ... >> However, a good portion of the additional error you're seeing with >> cheap GPS receivers with tiny little antennas is probably multi-path >> error, and DGPS won't help you with that. > > I got stuck on exactly that as well. And when I improved that - things where > far to large and heavy. > > Subsequently found that using a simple inertia motion sensor (this was for a > http://paparazzi.enac.fr/wiki/Autopilots board) to do relative stuff at < > 10cm combined with some very robust points from a GPS - though much less > accurate - was sort of a good compromise for periods of time under a few > hours. > > Thanks, > > Dw. > _______________________________________________ > Geowanking mailing list > [email protected] > http://geowanking.org/mailman/listinfo/geowanking_geowanking.org > _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
