Reviewing Base Antenna Height

[Jim Frame]

For the last couple of jobs I've done with my system, I've set up the T-LS on a point and connected to the local RTN and let it cook while I get out the rest of my gear. When I'm ready, I store the point, then replace the T-LS with the T2 and go through the base-rover setup, transferring the RTN point to the T2 as the base position. I then proceed to collect RTK with the T-LS.

When I look at a point collected with UHF base-rover, I can see the rover antenna height. However, when I look at the base point -- which shows up as a Design point rather than a Point point -- I don't see anything about antenna height. Is that information stored somewhere accessible?

 

[Matt Johnson]

Hi Jim, in the latest versions of J-Field the base point is saved as a survey point and the antenna height can been viewed. When the next update is released publicly this issue should be fixed.

 

[Jim Frame]

Along these same lines: with a total station survey I get a raw data file that documents things like instrument and rod heights. As I incorporate RTK into my regular workflow, I need to figure out the best way to accomplish the same kind of documentation. I don't have my T-LS in front of me right now, and I don't recall what point details are available to export, but I'm curious what others are doing in this regard.

 

[Jim Frame]

Now that I've had a chance to look at the export options, it looks like there's plenty of info there to provide an adequate measurement record for archival and reference purposes. When the base metadata becomes available, I think I'll have everything I need. Any idea when the next update will be released?

 

[Jim Frame]

P.S. The main reason this has risen to my attention is because of a well-intentioned mistake -- my characterization -- made by NGS when they calibrated the T2 antenna. Instead of just giving us the JAVTRIUMPH_2 model, someone decided it'd be a good idea to also provide the JAVTRIUMPH_2A model, presumably to simplify use with fixed-height tripods where the extension is required. The rub for me has been that I have to use 2.025 as the height for UHF RTK, but either use 2.000 with the JAVTRIUMPH_2A or 2.025 with the the JAVTRIUMPH_2 for OPUS. More than once now I've used 2.000 with UHF and/or submitted to OPUS with the wrong model specified. I'd have been much happier without the availability of the the JAVTRIUMPH_2A, and I'm trying to train myself *not* to use it. (Repeat after me: JAVTRIUMPH_2A doesn't exist, JAVTRIUMPH_2A doesn't exist...)

 

[Matt Johnson]

I believe most of us always use JAVTRIUMH_2A for the antenna model and enter 2.0m with a 2m pole. I know I always do. Note that with Base/Rover Setup JAVTRIUMH_2A is currently the only option available so you should only be using an antenna height of 2.0m in with it and not 2.025m.

 

[Jim Frame]

Ooops...it looks like I have to change my mantra to "JAVTRIUMPH_2 doesn't exist, JAVTRIUMPH_2 doesn't exist..."

I now can't recall with certainty what height I've been using with the base setup, which points out the need to make that metadata available. When's the firmware release coming?

 

[Matt Johnson]

I don't think a date to release the next update has been discussed much yet. I would expect 2-4 weeks though.