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Working RTK Base Station for less than $1,000
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Phainein7
Posted 5/7/2024 12:40 (#10731953 - in reply to #10731712)
Subject: RE: Working RTK Base Station for less than $1,000


Tipton, KS
AVP_Matt - 5/7/2024 09:06
Not sure what the angle is though, testing maybe?


North reference point (NRP) ???

"antenna calibration values can introduce errors at the centimeter level."

Issue is two fold:

1. NRP
2. Antenna calibration data not in antenna database, which is used by OPUS.

Trimble Ag25 Antenna is not in the database....if a person connected with the right person at Trimble, they could indicate where NRP is, but maybe not on item two.

Vector Pro RTK+ - Accuracy info in distance is given, but I don't know if the same if using NTRIP via home setup. OP might chime in here on this question. I have no idea how Vector Pro determines accuracy.

Footnote

"When submitting data to the NGS for inclusion into the NSRS, many issues such as setup, minimum of 4 hours, GPS only data, sandbags on tripod legs bases, type of receiver, antenna, etc. have to be documented. One of them is the correct orientation of the antenna or reciever to North.

The whole purpose of the antenna/reciever calibration is to determine the actual error of the offsets to L2 phase centers. This has to be considered when reducing the data. Some older antennas/receivers have as much as 2-3 cm offsets !

Quality control in observation data is key to any accurate position."

https://community.emlid.com/t/north-reference-point-nrp-of-rs2/23106...

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