Was just searching through the bands today and came across 152.6225, it appears to be a part of an LTR system. I can't find any info on the frequency listed with the FCC ULS database, anybody have any ideas on who this belongs to or a way to find out the other frequencies?
I'd recommend using a software program like LTR-Analyzer to see how many other channels there are, and what TGID's are using the system.
If it is truely LTR and active, you might be able to build up a little bit of knowledge about the system just by monitoring this freq for a week, or less if its really active. Then you'd have to go on an active search, looking for the other channels.
I've done this on a couple of occasions. I log all any frequency that turns out to be an LTR system in a spreadsheet. I record the channel IDs and TGIDs, then scan looking for the match. I don't turn off the software while searching. This helps me in catching a freq that is also active with an LTR signal.
The beauty with this software is that it tells you the other channel IDs that are transmitted on the channel that you are listening to. Once you find another active freq, just match up the channel IDs with a previous one, and then you'll be able to figure out the frequencies and the home channels.
Good luck,