Category Archives: FM

Video blog episode 010

Wow, it seems like just a year ago that I posted my first video!  Okay, it actually was a year ago.  This video is a how-to guide for audio processing of FM broadcast band recordings to make it easier to find and easier to hear sporadic-E and meteor scatter propagation.

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Log: FM E-skip, June 20th, preliminary summary

I was blessed with a major E-skip opening on the 20th. In addition to “live” DXing, and some single-channel audio recordings, I did almost 2 hours of SDR recordings with my Airspy. That provides almost 10 MHz of coverage (the edges of the bandpass tend to not be useful), amounting to around 47 channels available in a single recording. During this event, there were multiple distant stations on most clear frequencies cross-fading in and out, so I pretty much had to fully listen to around 47×2 hours of audio. I also wanted to assess how persistent stations were, so I kept listening for additional identifications of stations even after I had them securely logged. Also, I extracted recordings for nearly all of the stations, so that took additional time. The SDR recordings were biased toward the lower frequencies, so I probably missed a lot of high-band stations. Continue reading

Log: FM E-skip, June 17th

Conditions seem to be staying more summer-like and I had a good opening to eastern Iowa and western Illinois this afternoon that lasted for an hour. I can certainly understand why people get addicted to chasing E-skip! It’s pretty exciting flipping (or clicking, in my case) from frequency to frequency trying to catch identifications from the various stations that are flaring up. With an SDR, I can see the stations flaring up, so doing live DXing is sort of like a game of “whack-a-mole”. Continue reading