[msg=170453]Back in October 2012 I asked a similar question[/msg], now I have Trimble R8_GNSS Model 2 data provided to me, what exactly should I be using for the antenna model? I see the following R8's as choices.
TRMR8_GNSS
TRMR8_GNSS3
TRMR8-4
I see no "2" antenna listed.
The Trimble generated antenna model is a TRM60158.00 when I convert the DAT to RINEX, of course I see no such animal in the NGS list.
Can anyone with Trimble R8_GNSS Model 2 equipment tell me the correct NGS antenna to use?
Could Trimble muddy the water any more by having multiple models of the same basic receiver that apparently ALL warrant getting different antenna models? Wait, I bet they can, nevermind.
SHG
we have been using the GNSS model 3 with success. it is odd that TBC doesn't offer a model 2 option.
Thanks Joe, I went with the TRMR8_GNSS, seemed to work, however I probably wouldn't have noticed any very minor differences between the models for what I was doing.
SHG
My recollection was that the original R8 antenna (same as the 5800) was GPS-only, and the Model 2 was the first one that was GNSS-enabled. In the TBC antenna.ini file, the same phase correction table is used for the R8 GNSS, R8 2, and R8 GNSS3. The R8 and 5800 use a different correction table.
Thanks Jim, that makes some sense, I just wished that TNL hadn't made the differences so obscure! If you don't own Trimble gear it can be a bit crazy figuring it all out, maybe confusing even if you do own the gear 🙂
SHG
From the most recent ant_info.003 file, the TRM_R8_GNSS Integrated Antenna (R8) Model 2 has the same offsets as the TRMR8_GNSS3 NONE Integrated Antenna (R8) Model 2-COPIED
TRMR8_GNSS3 NONE Integrated Antenna (R8) Model 2-COPIED NGS ( 2) 06/05/22
0.9 0.0 103.9
0.0 0.6 1.6 2.9 4.2 5.5 6.7 7.5 7.9 8.0
7.6 6.8 5.5 3.8 1.6 -0.9 -3.5 0.0 0.0
-1.9 0.2 88.5
0.0 -0.9 -0.9 -0.1 1.1 2.3 3.5 4.4 4.9 5.0
4.6 3.7 2.3 0.5 -1.6 -3.7 -5.8 0.0 0.0
TRM_R8_GNSS Integrated Antenna (R8) Model 2 NGS ( 2) 06/05/22
0.9 0.0 103.9
0.0 0.6 1.6 2.9 4.2 5.5 6.7 7.5 7.9 8.0
7.6 6.8 5.5 3.8 1.6 -0.9 -3.5 0.0 0.0
-1.9 0.2 88.5
0.0 -0.9 -0.9 -0.1 1.1 2.3 3.5 4.4 4.9 5.0
4.6 3.7 2.3 0.5 -1.6 -3.7 -5.8 0.0 0.0
Let me know if you need the file
Brad Luken, LS
(AZ, CA, NV & OR)
Thanks. Like I mentioned, I used TRMR8_GNSS.
I notice in the relative file I have from 01-Apr-2013 that there are three antennas that look identical:
TRMR8_GNSS NONE Integrated Antenna (R8) Model 2-COPIED
TRMR8_GNSS3 NONE Integrated Antenna (R8) Model 2-COPIED
TRM_R8_GNSS NONE Integrated Antenna (R8) Model 2
I think these are the three choices you also indicated for R8 GNSS antennas.
I am now using the absolute antenna models and those have a ton more data and a bit harder to tell if they are identical, in addition the NGS naming is different now.
The current NGS absolute calibration file has the following three antennas for R8 GNSS antennas (my file is dated 06-Sep-2013 and I believe is the same as today at least for the R8 GNSS choices, but can't confirm because the website is currently offline):
TRMR8_GNSS NONE
TRMR8_GNSS3 NONE
TRMR8-4 NONE
These appear to ALL be slightly different and with those choices I used TRMR8_GNSS NONE.
SHG
Have a used Trimble R8 Model 1 - Any idea which antenna to select for OPUS? There are now four to pick from...