Yo Greg! On Sat, 20 Dec 2025 07:49:53 -0500 Greg Troxel <[email protected]> wrote:
> Hans Mayer <[email protected]> writes: > > > On 17.12.25 01:10, Greg Troxel wrote: > > > Yes I am in Austria and it is EGNOS. But where do I choose it ? > > GNSS receivers generally can generally enable or disable SBAS. Several ways to use SBAS in the reciever. One is to use the corrections from the SBAS to correct the signals from the GPS satellites. Another is to use pseudorange between the receiver and the SBAS satellitte in the position calculations. UBX-NAV-SBAS on the u-blox will tell you if ranging data is in use, or if the corrections are in use, and more. It also tells you which SBAS system is in view. The configuration items CFG-SBAS let you select if you want to use the SBAS signals. Most people doig high preceicion just turn off the SBAS stuff. It is lower wuality than the basic GPS now. > >> After that, if you are using a dynamic datum (Egnos TRF, ITRFnn, > >> WGS84), or a static datum on the wrong plate (NAD83 in EU), then > >> you need to bring positions to a common epoch to compare them. This does not really apply with CSRS-PPP. All you send to them is your measured psuedoranges. Before any corrections have been done in the reciver. The CSRS-PPP uses the currenent IRTF, or the IRTF of the time an older statsset was acrquired. Then Hans is just comparing the results from CSR-PPP for data taken at different times. So, Apples to Apples. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 [email protected] Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can't measure it, you can't improve it." - Lord Kelvin
pgpdxfqqEFx_w.pgp
Description: OpenPGP digital signature
