Hello,
I’m planning out my first UAS imagery mission with the Reach and would appreciate it if someone reviewed my plan. I have 2 Reach RS2 units, external LoRa antenna, a tripod and survey stick. Basically, the plan is the following:
Setup Base station and have it receive corrections from CORS through a cellular hotspot on a phone.
-The CORS station is about 20 km away from where I plan to put the Base.
The Rover will be used to get locations of GCP tiles I’ll place around the area to be GCP and Check points in my photogrammetry software.
In looking over the documentation, watching Youtube videos and reading form posts, I have a few questions on this plan:
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- Will getting CORS data do much for me if I have a good base placement with a good signal lock and some time to stabilize? Is linking my base to a CORS station 20km away worth it?
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- Should I capture known points from USGS? There are a couple around but they are pretty far away. There are a few vertical control points about 5km away from the area and a couple Classic Horz and Approx Ht points a few km away. I could capture them but again, would they add much value?
- I have read that the CORS corrections only need to be averaged by the base for 10 minutes then can be disabled. Is there benefit to having a continuous CORS link to my base over a day or two?
- Can you receive CORS corrections from the internet over WiFi and send corrected corrections over LoRa to your rover at the same time?
My end goal is to create 2D and 3D maps of the area to show within a few inches of ground truth when you are in the area and not be 6-10 feet translated west or something like that. The UAS can easily get 2-3 cm GSD.
Again, I’ve done a fair bit of reading and in these areas, I could use some specific advice.
Thanks again!