SV1XV's photos with the keyword: arecibo observatory

Arecibo on 5125.1 kHz

Arecibo on 5125.1 kHz

SV1XV
12 Jun 2019 355
Again a strong signal from Arecibo Observatory, 11 kHz wide and centered on 5125.1 kHz, with a new sweeping modulation pattern, at 23:50 UTC. The Arecibo signal was received using a Perseus SDR receiver and a dipole antenna.
Arecibo on 5125.5 kHz

Arecibo on 5125.5 kHz

SV1XV
12 Jun 2019 2 479
A strong DSB signal, 11 kHz wide and centered on 5125.5 kHz, with sweeping audio modulation, at 01:00 UTC. The Arecibo signal was received using a Perseus SDR receiver and a dipole antenna. @HAARPDXing2017 confirmed that this was the Arecibo Observatory ionospheric heater. The transmission ended at 01:39 UTC.