John Thompson
Well-Known Member
I did a job yesterday that made two short base files on the same point, and I want a single set of coordinates for the base.
I started the base the first time with an autonomous position and worked for a little over 2 hours. A thunderstorm came up and the weather service was predicting 2-inch hail, so we shut down and packed up. Ran some errands and got a bite to eat for just over an hour. Blue sky and sunshine again, so we set the base up on the same point and started it again with the same coordinates, checked Known Base, and worked for over 2 hours again.
This morning I DPOSed both base files. The first base point has AUTO and CORS coordinates. The second one has KNOWN and CORS coordinates, but the KNOWN coordinate of the second occupation is the same as the AUTO coordinate of the first occupation. The two CORS solutions differ by about 0.04' horizontally. Not a big deal- I can shift the second base and its rover shots manually, but I like having J-Field handle this sort of thing.
If I had not checked Known Base when I started the base the second time, would the KNOWN coordinates of the second occupation have shifted to the CORS coordinates of the first base when I DPOSed the first base?
Can I concatenate the two base files and DPOS them together to get a single, 6 hour static observation with a 1-hour gap in the middle of it?
I sent project Cottonwoods to support.
I started the base the first time with an autonomous position and worked for a little over 2 hours. A thunderstorm came up and the weather service was predicting 2-inch hail, so we shut down and packed up. Ran some errands and got a bite to eat for just over an hour. Blue sky and sunshine again, so we set the base up on the same point and started it again with the same coordinates, checked Known Base, and worked for over 2 hours again.
This morning I DPOSed both base files. The first base point has AUTO and CORS coordinates. The second one has KNOWN and CORS coordinates, but the KNOWN coordinate of the second occupation is the same as the AUTO coordinate of the first occupation. The two CORS solutions differ by about 0.04' horizontally. Not a big deal- I can shift the second base and its rover shots manually, but I like having J-Field handle this sort of thing.
If I had not checked Known Base when I started the base the second time, would the KNOWN coordinates of the second occupation have shifted to the CORS coordinates of the first base when I DPOSed the first base?
Can I concatenate the two base files and DPOS them together to get a single, 6 hour static observation with a 1-hour gap in the middle of it?
I sent project Cottonwoods to support.
