And I believe that I read somewhere that the 6Ks with the GPS option can timestamp data packets from a collection of GPS option equipped 6K stations that can then be sent to a processing server for further analysis. At least it is my understanding that the 6K's HW is designed to support that kind of system. Don't know if the SW in the radio is in place to do that yet or not...
As could be predicted, many of the comments in that thread are thinking too small, or too old school.. It just seems to me that the 6K's could be quite useful for such an effort as part of a pretty highly automated system, and be the RF listening piece of such an effort..
anyone here going to dispute that?
My 6700 has the GPSDO and is ready for the software.
However the software to use the data is not there yet.
A distributed network could discover and locate lots of natural and unnatural signals and not just those of earthly origin.
Andrew de VK5CV
Interesting concept. If there were enough stations reporting coordinates and received dBm, I'll bet a clever algorithm could provide a general location. Then the folks with the DF loops could take over. As always, spearheading and coordinating such an effort is the large obstacle. How about a letter to the ARRL and its OO department?
First step in the case of intentional jamming is to alert the FCC, which has a US-based HFDF system, operated out of Columbia, MD.
So I bought it.
But now there are software programs that do that automagically for us.
So I'd be willing to take part in a system to analyze bad signals and attempt to locate them no matter whether they were Ham signals or darn sweeping signal buzz I hear here in Chicago area a lot.
But the idea of a network of gps linked receivers would have more applications than merely DFing interference and bad behavior....primarily utility in locating ships in danger, lost hikers, and assisting In other emergencies.
Ken - NM9P
I bought the GPS options because I see the digital modes as the way of the future. With them tight frequency control and accurate time keeping are crucial. I have the frequency well in hand. What I am waiting for is an applet that will let me use my Flex as the time source to keep my computer in sync. I have the software on the computer, I just need SSDR to externalize the GPS time string, maybe through the accessory port. Nothing is more frustrating than to see the words "wrong clock" appear on the N0UK EME screen or via a text message from a local friend. As many of you know with CW or SSB being off by seconds or even minutes is not really a problem except maybe with QSLing. With the more robust digital modes a 1 sec error can be the difference between a decode and no decode.
So that is why I am very glad I bought the option.
I have GPSDO that I bought on the yet unfulfilled promise of wide area diversity reception
On The Other Hand. I DOUBT that I would participate in such an experiment because of the "Who is going to determine who is a Bad Actor" issue. The last thing we need is more self styled "nay Nay, I am going to Tell on You" frequency police
If you're dealing with variable propagation channels (especially HF), phase coherence is probably not useful anyway. Instead, you can look at differential time delays of modulated signals, which is a millisecond game (down to 100 usec maybe). A group of us did some preliminary work on HF Time of Arrival a few years back, using data tagged with the GPS seconds pulse. Conclusion: radio location of jammers (our interest) should be doable but not easy.
Flex 6000's with GPS and time tagged data would certainly help.
Also I actually have not previously pondered the DF possibilities of the 6K's beyond thinking that time based DF approaches should be possible with it. Then that thread started on QRZ and that got me thinking about it in some more detail from a purely a technical perspective, and the state of readiness of the SmartSDR/API such that someone could maybe pursue it. I also weighed in on that QRZ thread mainly as a "hey guys there are some new state of the art ways to possibly pursue this idea" alert. Make those reading that thread aware that there are new approaches to consider instead of just the very old school ways that the thread was initially focused on. There is a very big lack of awareness out in general ham radio land of just what the 6K hardware is actually capable of, especially when using them in ways other than working with just one signal at a time like traditional radios are limited to.
And also as I ponder this concept some more, I could also see some of these same ideas being applied by HF contest sponsors as a means to near real-time "referee" a contest. Wouldn't that be a new concept? Prior to wide-band sampling SDRs such an idea would have been extremely difficult to implement. Now it seems to be entirely within the realm of being possible.
I didn't order the GPS with my 6700. I didn't see any use for it and after more than 2 years, I still don't see any. Shoot, by the time the software catches up, I'll most likely be upgrading the rig!
It could be that the current OO program is effective, but I have seen no evidence. For example, the mess on 14313 is well known and has apparently existed for years. As far as I can tell, there is no readily apparent, easily accessible reporting mechanism.
I have sent screen shots from the Flex to a few blatantly QRM'ing operators, along with a nice message explaining how the splatter from their signal was essentially wiping out QSO's on either side of their frequency--QSO's that were in process before they started transmitting. In turn, I have received replies thanking me for sending the information, as they were unaware that their signal was so wide.
Ignoring bad signals/improper operations is definitely not the right approach.
Your gentlemanly approach, along with convincing documentation, is exactly in line with good amateur practice.
The 14.313 problem, along with many others, have been reported and fully documented by OO's and reported to the FCC. OO's are allowed to only observe, document and report. If these reports fall on short-staffed departments at the government, delays happen. But eventually many of these things do get addressed.
I know, for example, that drivers stopped by state police in this state as a result of a *SP call, are reportedly surprised and apparently unaware of their dangerous driving.
I practice "See Something, Say Something" ("Hear Something, Say Something") and I encourage others to do the same. There is little point in complaining to each other.
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