HFU HF Underground

Loggings => VHF/UHF Logs, including satellites and radiosondes => Topic started by: Josh on August 08, 2017, 0324 UTC

Title: CIS Cosmos sat
Post by: Josh on August 08, 2017, 0324 UTC
149.375MHz fm fsk 0313Z 08Aug17


COSMOS 2454 in a secret Russian military spacecraft believed to be Parus navigation satellite for the Russian Defense Ministry. Parus satellites circle Earth in 620-mile-high (1,000-km-high) orbits over the poles. The new Parus spacecraft will likely be renamed Kosmos 2454 when it joins Russia's military satellite fleet.
https://www.n2yo.com/satellite/?s=35635

Description: A chain of five satellite receivers observes signals from the Russian Low Earth Orbit (LEO) satellites. Two signals transmitted coherently at frequencies 150 MHz and 400 MHz are received and their phase difference is used to calculate the ionospheric electron density by means of statistical inversion. The results are shown in terms of electron density plots in a vertical plane above the receiver chain. In an ideal case the satellite flies along the chain. If this is not the case, the plot is a projection from regions outside the vertical plane. In order to estimate the validity of the results, check the satellite path in each case. 
http://www.sgo.fi/Data/Tomography/tomoDescr.php
Title: Re: CIS Cosmos sat
Post by: sat_dxer on August 08, 2017, 1440 UTC
Kosmos 2454 was launched on 21 July 2009
Orbit: 915 x 944 km 82.6° inclination
(typical 950 km × 1005 km, 82.9°)
The next in this series Kosmos 2463 was launched on 27 April 2010.

The Parus (Russian word for Sail) program began in 1974 with the launch of Kosmos 700

They are reported by various sources it acts as data relays for the US-P (EORSAT) ocean surveillance satellites.
Title: Re: CIS Cosmos sat
Post by: Josh on August 08, 2017, 1745 UTC
It musta passed right overhead, it came in, built strength, faded abruptly, and came back in for a bit. Haven't heard a russkii satskii in ages, last time was in the late 80s on 150.0MHz. Need to get the v/uhf sdr going on these sigs and see if any decoders will reveal anything.
Apparently the actual qrg is 149.940.
Title: Re: CIS Cosmos sat
Post by: Josh on August 11, 2017, 0306 UTC
149.940MHz fm fsk 0300Z 10Aug17
Title: Re: CIS Cosmos sat
Post by: Josh on August 12, 2017, 1530 UTC
149.940MHz fm fsk 1516Z 12Aug17
Long pass this time, musta been right over head.
Title: Re: CIS Cosmos sat
Post by: sat_dxer on August 12, 2017, 1846 UTC
A useful link:
http://web.archive.org/web/20130626213107/http:/www.alancordwell.co.uk/satellite/russian/index.php

Consider using some current Two Line Elements in a tracking software program to see which one was "right over head"
Title: Re: CIS Cosmos sat
Post by: Josh on August 12, 2017, 1901 UTC
Thanks for the link. Was wondering where I could go to see what bird was singing.
Title: Re: CIS Cosmos sat
Post by: Josh on August 13, 2017, 1726 UTC
Kosmos2454 was overhead around noontime here. The track was pretty much right overhead.
https://www.n2yo.com/satellite/?s=35635
Title: Re: CIS Cosmos sat
Post by: Josh on May 26, 2018, 1805 UTC
149.940MHz Kosmos2454 fm fsk 1755Z 26MAY18

Here's some links to decoding this signal;
https://www.youtube.com/watch?v=sQnuPlgU7KY

https://www.rtl-sdr.com/decoding-russian-parus-cosmos-navigation-satellites-rtl-sdr/
Title: Re: CIS Cosmos sat
Post by: sat_dxer on May 28, 2018, 0208 UTC
The 1980 paper referred to in the rtl-sdr article is entitled:
The Russian Satellite Navigation System
Philosophical Transactions of the Royal Society of London, Vol. 294 pp. 297-315.

Other Kettering Group papers worth finding on the subject can be seen in:
Journal of the British Interplanetary Society Vol. 29 pp. 307-316 (1976)
Soviet Space Programs:1976-80 Part 3 US Senate committee Print (May 1985) pp. 782-783, 979-987
Space Communication and Broadcasting 4 (1986) pp. 51-61

The youtube video is interesting by not very informative. 
Title: Re: CIS Cosmos sat
Post by: Josh on June 03, 2018, 1652 UTC
There goes the Ruskii bird at 1649Z, strong sig.

(149.940MHz Kosmos2454 fm fsk)
Title: Re: CIS Cosmos sat
Post by: sat_dxer on June 12, 2018, 2330 UTC
One aspect of the Tsiklon-B navigation system is that satellites in planes 1 and 4 transit on 149.97MHz; ones in plane 2 on 149.91MHz; ones in plane 3 and 6 on 149.94MHz;and satellites in plane 5 on 150.03MHz.
The Parus constellation is made up of six orbital planes, spaced at 30° intervals.
Title: Re: CIS Cosmos sat
Post by: ChrisSmolinski on June 13, 2018, 1115 UTC
I am just getting back into satellite monitoring, so this thread is very interesting. Are there any up to date lists of the frequencies of the various Russian birds that transmit around 150 MHz?
Title: Re: CIS Cosmos sat
Post by: Josh on June 13, 2018, 1705 UTC
http://www.russianspaceweb.com/site_map.html

https://www.n2yo.com/satellites/
Title: Re: CIS Cosmos sat
Post by: Josh on December 20, 2018, 1845 UTC
149.375MHz fm fsk 1803Z 20DEC18

Strong sig, dropped out for a min or two, then back in strong. This is what you get when a moving signal source is directly over a vertical antenna.
Title: Re: CIS Cosmos sat
Post by: shadypyro on December 28, 2018, 2235 UTC
Would i be able to get Cosmos frequencies with my bearcat scanner, or do i need a vertical antenna to pick it up?

Chris
Title: Re: CIS Cosmos sat
Post by: Josh on December 29, 2018, 0027 UTC
Lol when they're around you'll have a hard time keeping them out of your scanner no matter what orientation. I suspect they're best received with circular polarisation, but anything will do.

Here's some bits on decoding them;
https://www.rtl-sdr.com/decoding-russian-parus-cosmos-navigation-satellites-rtl-sdr/
Title: Re: CIS Cosmos sat
Post by: shadypyro on December 29, 2018, 0409 UTC
Lol when they're around you'll have a hard time keeping them out of your scanner no matter what orientation. I suspect they're best received with circular polarisation, but anything will do.
I will see what I can do.
Here's some bits on decoding them;
https://www.rtl-sdr.com/decoding-russian-parus-cosmos-navigation-satellites-rtl-sdr/