You can download a 30 day free trial of TBC. If you are in a pickle. I have done this before just to help a friend. Or use opus projects instead of the generic OPUS so you can get more data and solve the network solution to check for outliers etc.
lol on 10 being bad. I remember planning and seeing 4 to 5 after planning sessions. We have become spoiled with multi constellations for sure. I remember the first time I had a r12 put in my hands and I could see 32 satellites and it was using over 20 of them. I started laughing and the guy I was with said what’s so funny. I said well I see 30 plus satellites. The gps constellation itself is only close to that number which you would never see that many gps ones at a single moment. Now with all the other constellations if less than 20 we start worrying. Man how things have changed.
Looking at the distances from my base:
each had one at 163.26 miles and 37.57 miles
Then one has one at 71.85 miles and the other, 2302.2 (!) That’s friggin’ northern CA
I thought you might be looking at some long distances. Working back from the spec sheet of the unit a rough calculation (easing math by assuming all error was in the GPS unit) of the ppm error I had you at least 100 miles from the CORS stations. If that is the closest CORS, you might be seeing the best results you will get out of OPUS processing.
Given the distances you posted, I would probably download the data from the CORS and process each 3 hour dataset with the 37.57 mile and the 71.85 (still a pretty good ways away) mile station and see how they worked. If the answers weren't good, I would do a single baseline from the 37.57 mile CORS for each 3 hour dataset and compare them to each other.
The R8-3 brought Galileo tracking but you mentioned only GPS (US) and glonsss.
And static observations do not give an absolute elevation determination without long observations. So even in the US you can log a file for 4 hours in the morning and 4 hours in the afternoon and they can return elevations 0.1 feet difference. NGS guidelines would be I think something like 3 separate 4 hour observations reach 12 hours apart , or a 12 hour observation. I’m probably off a bit. But you get the idea that you’ll have variability with individual 3 hour static files.
OPUS isn't the tool for dave-o's enviroment. I would hold the island's one CORS point on Mauna Kea and compare the resulting value to a tie from the CORS on Haleakala. Once you have a good number (if that's possible) I would show enough site control to recreate it on site and also show the CORS values used with the date of the survey.
Where dave-o is ground is moving fast, moving probably up and moving westerly.
Local site control is critical.
