I'm confused by (among other things) the baseline processing report information generated by TBC. Here's a shot of the properties of a baseline that shows antenna types:
The image below is from the baseline processing report. It shows that NGS absolute models are in use by the processing style, but the message under the observation heading suggests that a model wasn't applied. Am I misinterpreting this?
Jim
This is copied from the TBC help file.
antenna phase correction
A correction factor used for the variation in the antenna phase center location for a GNSS antenna resulting from the changing direction of the satellite signal.
The location of the phase center for a GNSS antenna is neither a physical nor a stable point. Instead, it varies with the changing direction of the signal from a satellite. Most of the phase center variation depends on satellite elevation. Correcting for this variation in the GNSS antenna phase center location allows a variety of antenna types to be used in a single survey. Antenna phase center corrections are not as critical when two antennas of the same type are used since common errors cancel out.
I find it interesting that the quoted text doesn't actually come out an state that TBC applies the corrections, but for now I'm willing to assume that it actually does. That being the case, it looks to me like no corrections are being applied to my data, despite the fact that I'm using antennas for which models are available and a processing style that claims to be using those models. I guess I'll try changing the specified model set and see if I get a different result.
Now, if I can just figure out how to do that. As I recall, the model set is specified upon data import. Anyone know how to access that option after the data's already in the project?
Thanks.
Edit: Found it! It's in the Project Settings, right where one would expect to find it. 🙂
In a conversation with Trimble tech support this morning, I was told that TBC doesn't have NGS absolute models in its database. The fact that absolute models are one of the choices for processing styles is a little disturbing under the circumstances, because as things stand if you specify absolute models you'll get no phase corrections at all.
I was also told that TBC uses the same antenna.ini file as other Trimble software, including TGO. That file is customizable to include absolute models, and I added the absolute models for my antennas when I was using TGO. I haven't tried figuring out how to get them to show up on TBC yet, though.
