Quote:
Originally Posted by algwat
Thank you Malcom,
I am just a listener not a transmitter, and am trying to use small SDR's
This frequency seemed have some short burst signal level changes, and longer changes as aircraft moved by. Although it faded out as the sun went down? I managed to record a couple of audio wav's of the short events.
I have tried to listen for reflections at 140Mhz with WSJT9, no luck as yet.
kind regards, Alan.
|
Unfortunately it is a precision measurement tool, There is only a small window of measurement available, the higher the angle of reflection the smaller to coverage, hence 2 - 3000 km is optimal, too low creates other problems. The only other problem maybe the SDR if it is a $20.00 RTL2823U version has a noise floor at -60dbm which makes only strong reflections to make the grade. Most quality RF receivers run down to -120 to -150dbm which is quite a substantial difference. Still may display larger meteors though.