Monthly Archives: January 2021

Weather Satellite Decoding

Getting back into weather satellite decoding after almost ten years. Plan is to have Raspberry Pi 4b display images decoded on a 7″ screen with Pi secured behind it. However first things first. Need to check I can decode the images on a PC.

Picture below is thermal imaging enhancement from NOAA 15 on a north pass pass at 18:42 local. Rig is a AOR DV-1 which has an ideal 30k filter but the recording output is only 15k discriminator! Antenna is a very low Diamond V2000 at around 2.5m so you can see the signal drop-outs (horizontal noise bands) from obstructions in the local environment. Software is the venerable wxtoimg pro edition. This is now effectively freeware though I paid for my pro edition back in the day. I couldn’t get the production copy from to install under WIndows 10 but the beta version did and works fine.

Next up is to either get the V2000 higher or install the turnstile antenna I bought a year ago in a higher position. The ultimate is a quadrifilar antenna but that can wait until everything else is working. Software wise I’ll test a Airspy HF+ Discovery or SDRPlay SdxDx into wxtoimg via a virtual cable and also start building the software which is required on the Pi.

680 kHz KBRW Barrow Alaska

Many dxers have been reporting this one during UK afternoons recently. This is how it was sounding just after local sunset in western coastal Wirral Sunday 17 January 2021. Note sideband shapes and notch on 684 kHz to enhance audio fidelity. Perseus SDR/native software/Wellbrook 1530LNP

Mystery on 927 kHz

Bit of a mystery on 927 kHz with English programming. Probably from Ireland – video shows how it is being received in western coastal Wirral this afternoon on Perseus SDR/Wellbrook 1530LNP. Also 846 and 981 kHz from Ireland to show comparative signal strengths.