The a-priori error estimates, as shown above, really depend on the tools and procedures that go into the work. While 5mm centering error is much higher than I would have for most of our GNSS work, if we are using a standard prism pole at 2.5m high, then maybe it is appropriate. We check our bubbles all the time and store them carefully. I used fixed height tripods for static GNSS work, and those are good to a couple mm for centering and even better for height.
1.96 is 2 sigma (95% confidence) for the error reporting. It is a pretty standard level of confidence for our work.
I suspect that you would benefit from some proper training. While this can seem like a push button type thing, a professional shouldn't just black-box it.
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Dave Olander
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Original Message:
Sent: 11-27-2022 02:56
From: Shanker KC
Subject: Reference factor value 2.63
Hi all, this is my adjustment settings. I set antenna height error 5mm and centering error 5mm. What should be the optimal error value for antenna height and centering purpose?
and
what does it mean by "Scale on Linear Error[s]: 1.960"?
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Shanker KC
Original Message:
Sent: 11-25-2022 17:52
From: Marian Plucinski
Subject: Reference factor value 2.63
Your a priori estimates of observations' errors in your network were too optimistic.
Review the guidelines to processing control networks by DTMR QLD. They explain step by step how to preform adjustments in TBC.
https://www.tmr.qld.gov.au/business-industry/Technical-standards-publications/Surveying-support-documents
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Marian
Original Message:
Sent: 11-25-2022 01:53
From: Shanker KC
Subject: Reference factor value 2.63
Hi all, my results after network adjustment is as shown above. What does it mean by reference factor of 2.63? Now how should I proceed further?
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Shanker KC
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