Arecibo HF Heater Planned Ops

[Boriken]

Arecibo telescope HF heater operations planned for the week of June 10 2019. Usually around 5100kc and/or 8175kc.

http://www.naic.edu/vscience/schedule/scedfra2.htm

[Boriken]

Fairly strong carrier on 5100kc. Showed up shortly before 1300 UTC.

[ChrisSmolinski]

I have seen a carrier switch on and off a few times, most recently it switched on at 1400z sharp.

[SV1XV]

Arecibo on 5125.5 kHz par SV1XV, on ipernity

Last night I received a strong DSB signal, 11 kHz wide and centered on 5125.5 kHz, with sweeping audio modulation, at 00:30-01:39 UTC. Twitter user @HAARPDXing2017 confirmed that this was indeed the Arecibo Observatory ionospheric heater. The Arecibo signal was received using a Perseus SDR receiver and a dipole antenna.

A Perseus screen capture is available here:

http://www.ipernity.com/doc/777361/48740780



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[ChrisSmolinski]

I have the same pattern 1340 UTC 12 Jun 2019 centered on 5125 kHz

[SV1XV]

Arecibo on 5125.1 kHz par SV1XV, on ipernity

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.

A full size Perseus screen capture is available here:

http://www.ipernity.com/doc/777361/48743814

[Boriken]

Still going strong with the sweeping at 0030 UTC. Just a sweeping tone to us with analog receivers. Your screen caps looks like they're sending the aliens a road map.

[Sparx]

VERY strong, clean signal in MN on 5125.   Repeated Y-shape on the waterfall.   
Nothing on 8175.
Waiting for ET to reply.

0115 Stopped.

[SV1XV]

Tonight, at 22:30 UTC,  the Arecibo Observatory signal consists of an unmodulated tone carrier (ITU designation N0N)  on 5125.0 kHz.

[Josh]

S1 to S5 carrier with quick fades, no mod @ 2303.

[R4002]

Considering the power they're running, I wonder if they're causing any QRM to the datalink transmission appearing on the waterfall image around 5120 kHz / 5120.5 kHz (appears to be centered on 5120.7 kHz or so).