HFU HF Underground

Loggings => Other => Topic started by: Boriken on May 17, 2019, 0237 UTC

Title: Arecibo HF Heater Planned Ops
Post by: Boriken on May 17, 2019, 0237 UTC

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

Title: Re: Arecibo HF Heater Planned Ops
Post by: Boriken on June 10, 2019, 1309 UTC

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

Title: Re: Arecibo HF Heater Planned Ops
Post by: ChrisSmolinski on June 10, 2019, 1401 UTC

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

Title: Re: Arecibo HF Heater Planned Ops
Post by: SV1XV on June 12, 2019, 0401 UTC

(http://cdn.ipernity.com/200/07/80/48740780.f8e9a6dd.240.jpg) (http://www.ipernity.com/doc/777361/48740780)
Arecibo on 5125.5 kHz (http://www.ipernity.com/doc/777361/48740780) par SV1XV (http://www.ipernity.com/home/777361), 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



.

Title: Re: Arecibo HF Heater Planned Ops
Post by: ChrisSmolinski on June 12, 2019, 1343 UTC

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

(https://i.imgur.com/rXoHtcw.png)

Title: Re: Arecibo HF Heater Planned Ops
Post by: SV1XV on June 13, 2019, 0007 UTC

(http://cdn.ipernity.com/200/38/14/48743814.6b2e2ed3.240.jpg) (http://www.ipernity.com/doc/777361/48743814)
Arecibo on 5125.1 kHz (http://www.ipernity.com/doc/777361/48743814) par SV1XV (http://www.ipernity.com/home/777361), 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

Title: Re: Arecibo HF Heater Planned Ops
Post by: Boriken on June 13, 2019, 0040 UTC

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.

Title: Re: Arecibo HF Heater Planned Ops
Post by: Sparx on June 13, 2019, 0047 UTC

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

0115 Stopped.

Title: Re: Arecibo HF Heater Planned Ops
Post by: SV1XV on June 14, 2019, 2233 UTC

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

Title: Re: Arecibo HF Heater Planned Ops
Post by: Josh on June 14, 2019, 2304 UTC

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

Title: Re: Arecibo HF Heater Planned Ops
Post by: R4002 on June 17, 2019, 1441 UTC

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).