hello,
thanks for sharing results
![Smile :-)](./images/smilies/icon_smile.gif)
This topic is also interesting for me.
I have tested also the reception of 6m echoes, the frequencies that had used are located at Russia. Currently I had heard typically 5...7 different remote TV station carriers at 49.75MHz region. Many echoes seen different time on a different frequency. My permanent station at central Finland for remote use is on "to-do" list. I have a possibility to test 6m antenna (2 element diamond yagi) on the next few weeks.
Could you clarify how the data got into your diagram. Are you using a third party sofware that calculates number of echoes? I do not have yet use the SDR play, so not sure what features it has.
In my own tests I have used HDSDR together with Ettus B100 SDR radio for reception (50...2200MHz). There I have routed audio (with virtual audio cable) from HDSDR to HROFFT for echo calculation. Then finally draw a diagram with HROFFT -> RMOB colorgramme.
I do know that HDSDR has a capability to save the actual RF spectrum to wav file continuously. Also it can take a periodic image capture of RF waterfall -> which I plan to capture strong "head echoes" - what would be used for the further calculation.
Unfortunately in my case, the HDSDR is very unstable with Ettus SDR, I believe it is a sofware issue somewhere (most propably in HDSDR, or the DLL uses towards Ettus). I tried to contact the author of HDSDR - but it seems to be very difficult to any get feedback there. If I do not had these sw issues, then HDSDR would be very fine tool
Have a successfull hunting for the echoes
-Timo, OH7HMS