Aloha Hansubxtool -p CFG-GNSS | grep CFG-GNSS -A 20 UBX-CFG-GNSS: msgVer 0 numTrkChHw 60 numTrkChUse 60 numConfigBlocks 6 gnssId 0 TrkCh 8 maxTrCh 16 reserved 0 Flags x11110001 GPS L1C/A L2C enabled gnssId 1 TrkCh 3 maxTrCh 3 reserved 0 Flags x01000000 SBAS gnssId 2 TrkCh 10 maxTrCh 18 reserved 0 Flags x21000000 Galileo gnssId 3 TrkCh 2 maxTrCh 5 reserved 0 Flags x11000000 BeiDou gnssId 5 TrkCh 0 maxTrCh 4 reserved 0 Flags x15110001 QZSS L1C/A L2C enabled gnssId 6 TrkCh 8 maxTrCh 12 reserved 0 Flags x11110001 GLONASS L1 L2 enabled
I have no L5 hardware so far. I'm quite happy with the breakout board from Adafruit for the F9P. It's sitting outside in a solar powered box, data transmission is over a 57600bps serial RF link with an RPi4 on Raspian serving as host for gpsd. That setup has proven to run quite stable over the last year. I had some glitches with the F9P being very sensitive to power issues but only one serious enough that I had to open the box and replace the solar battery controller. The F9P was in a state where I had to use the SAFE/RST pins to bring the chip back to life.
Cheers, Werner On 11/25/25 07:47, Hans Mayer wrote:
Hi Werner, many thanks for your answer.I saw the two files attached. The first (older) did only mention GPS but the newer had also Glonass .Do you still have the information which bands were configured ? Kind regards Hans -- On 24.11.25 00:39, Werner Thie wrote:Aloha alljust wanted to confirm that the Canadians process GPS and GLONASS just fine.Attached are two Canadian produced .sum files generated from two runs done in August, capture was done with an F9P-L1/L2 without SBAS with 5sec interval between samplesEnabling/disabling constellations with ubxtool -d BEIDOU ubxtool -d GALILEO ubxtool -e GLONASS ubxtool -d SBAS ubxtool -e GPS Verify with ubxtool -p CFG-GNSS | grep CFG-GNSS -A 20 Lower the acqusition rate, our base station is definitely not moving ubxtool -p CFG-RATE,5000,1 Filenames YYYYMMDD-8h-raw.ubx The runs were captured with gpspipe -x 28800 -R > 20250808-8h-raw.ubx Process into universal GNSS JSON format with gpsdecode < 20250808-8h-raw.ubx >20250808-8h-raw.json Create a RINEX3 observation file for submittal to a PPP providergpsrinex -F 20250808-8h-raw.json -i 30 -n 960 which will produce a file namedgpsrinex2025217234351.obs Submit this file to the Canadian CSRS-PPP service. SW Version UBX_F9_100_HPG151_ZED_F9P.6c43b30ccfed539322eccedfb96ad933.binDoes anyone know if the report's accuracy improves over time with the measured satellite positions becoming more accurate? If so what would be the best delay for asking for a PPP analysis?HTH, Werner On 11/22/25 14:59, Gary E. Miller wrote:Yo Hans! On Fri, 21 Nov 2025 23:04:28 +0100 Hans Mayer<[email protected]> wrote:So I decided I give it a try again after years. My environment is an U-BLOX ZED-F9P (PROTVER=27.12) with an antenna HAB-ANN-MB-00-00 fix mounted on the top of the roof of my house.Which F9P model? L1/L2, or L1/L5. With or without SBAS? Did you verify the correct signals were enabled. As in: ubxtool -g CFG-SIGNAL https://gpsd.io/ubxtool-examples.html#_checking_constellations_gen9 Got the dynamic model set to fixed? Like this: ubxtool -g CFG-NAVSPG-DYNMODEL,0 https://gpsd.io/ubxtool-examples.html#_gen9_7I did run twice a measurement as described in example 1 of the man page. The first with 12 hours 46 min and the second with 12 hours. This was the command line I used: gpsrinex -i 30 -n 1440 --ant_num 2 --observer mayer --ant_type HAB-ANN-MB-00-00 localhost:gpsd:/dev/serial0Looks good. But the ant-type is not one of the "official" choices.When I got the first result I was impressed. I got a 95% sigma of 12 mm for lat and 10 mm for long. So I started a second run with 12 hours. There I got 15 mm and 22 mm as result of sigma. Not so bad I thought. But then I calculated the distance between this two geolocations. And the result was disillusioning. The distance is 164 mm , far away of this 95% sigma.Wow. First I have heard of anyone doing that. Disappointing. I'll have to give that a try, I nevver thought to compare two runs.About 2 years ago I tried to find the accurate position by averaging. I run 12 times 24 hours measurements. When I calculate the distance between this result and the gpsrinex result I get more than half a meter. So I am not sure what I should believe what is true and what is wrong."A man with more than one watch never knows what time it is." There is a USGS benchmark near me, for a long time I thgouht I should run a test with my antenna over the known position. Uh, oh. Looking at that benchmark, it does not have any accuracy specified...And there is another question. At the Canadian PPP service I read now they support GLONASS and Galileo too.So they say. Did not work for me last time I tried.So I left both systems in the config enabled. But the final report didn't list them.Dunno what's with that. I have emailed them a few times. But the operators have zero clue as to what the program they run actually does. 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
