Hi Steve,
Thanks for the thorough update here. I really appreciated the comprehensive info, which helps us understand what we're dealing with. I had noted the correlation between tilt distance (tilt error) and tilt angle. I was perhaps mistaken by the term tilt error. Is there scope for that to read tilt distance? or tilt correction? especially when we are in mode INS RTK Fixed (I acknowledge that the column header will be a predetermined output for all scenarios)
As a side note, we haven't confirmed the issue with the last survey, although it is highly likely the surveyor connected to another base station on the same frequency as we were circa 3+ metres out in half of the work order.
P.S Thanks for the comments re: firmware. We'll get that sorted.
Kind regards and thanks,
Julius
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Julius Newman
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Original Message:
Sent: 06-15-2022 07:46
From: Steve DiBenedetto
Subject: INS RTK Fixed - Definition
Hi Julius,
INS RTK Fixed means that you had an RTK fix, with the INS (Tilt Compensation) enabled. That means you were getting the best accuracies out of the GNSS.
If you're referring to the "Tilt Error" column, that represents the simple geometric calculation of if you did not have Tilt Compensation enabled how far a plumb vertical line straight down from the bottom of the receiver to where the rod tip is. I.e. how far away the plumb line from the receiever to the rod tip is. You can see that the greater the tilt, the greater the Tilt Error. But since you had a INS RTK fix you shouldn't need to worry about that tilt error, as it's for information only, since you are getting a rod-tip position that accounts for the tilt. The firmware team has spent countless hours testing and developing to ensure that the reported horizontal and vertical precisions are accurate for a tilted rod, so you can consider those values in the Hz and Vt Precisions columns to be the correct precisions for any given measurement.
The tilt error would be more applicable if you were using a tilted rod and did not have Tilt Compensation on and was included at a time when the eBubble existed to be able to measure the tilt, but prior to Tilt Compensation which actually corrects for and allows tilted measurements to be correctly calculated at the rod tip. Without tilt compensation on (i.e. INS RTK fix) you always are going to get a postion that is directly underneath and plumb to the receiver.
Also, FYI you're running Firmware 6.06, there are several newer versions released since then that improve performance, so would suggest upgrading to get the latest and greatest. 6.13 is the latest...
Hope that helps!
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Steve DiBenedetto
Original Message:
Sent: 06-14-2022 19:36
From: Julius Newman
Subject: INS RTK Fixed - Definition
Hi, Not sure where this should go on the forums.
I've received a survey with a precision type INS RTK FIXED. Does anyone know what this is?
Incidentally, the tilt accuracies are not ideal, suggesting that the tilt may not have been calibrated prior to survey start. The survey also has some apparent issues with levels which could be due to base changes.
Regards, Julius
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Julius Newman
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