This wideband data has been around for a while, but has become more common in the last 9 months. There are several Experimental Licenses that match the approximate modes and frequencies normally seen.
WIXNX IL
WH2XVO IL, NJ, AK
WI2XWV IL
WI2XER NY
WI2XXG NY, IL
WI2XAJ NY, IL, WA
Note that a few of these are ones people have tried to tie to the Time Tick Pips (TTPs).
None of these licenses cover the modes or frequencies displayed by the TTPs. I have said a few times I doubt that the TTPs and the High Frequency Trader (HFT) tests are related, and I think this might be a further indication. There is some indication this wideband data might indeed be the HFT testing, at least it is believable it might be related. Generally we don't see the TTPs in the same frequencies we see the wideband data. If the TTPs were related, and were the results of the experimental trying to define propagation or discover any little advantage to propagation, why don't they also do that on freqs they are known to use?
Just my take on it.
T!