Ok, so this is going to sound really weird, but please bear with me. For the last several evenings, at exactly the same time, my radio astronomy receiver has been receiving a series of square waves, of amplitude about 100Jy (large by radio astronomy standards, tiny by anybody else' measure of such things). These are near-perfect 50% duty-cycle square waves of period approximately 166 seconds, with an initial lead-in of a few minutes, then a series of, ahem, 1s and 0s, then trailing off to nothing.
While it's far-fetched that someone would put an easter-egg in that would only be obvious to my application, it's not inconceivable. So? Obviously, there are lots of other explanations, like a strange radar that I haven't seen before, some kind of bad-ass ionospheric sounder that makes my local ionosphere slightly opaque to 21cm radiation in a square-wave pattern. Or one of a number of other types of weird RFI sources. I found nothing in the spectral display, so whatever it is seems to be either broadband in nature, or narrowband, and driving my LNA into slight compression in a square-wave like pattern, but outside of my receiver passband.
signature.asc
Description: OpenPGP digital signature
_______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
