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Author Topic: Chinasat 6B and FIRE DRAKE Jammer  (Read 3432 times)

Offline N32117

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Chinasat 6B and FIRE DRAKE Jammer
« on: October 05, 2015, 2040 UTC »
Do any of our members have any non-public literature on the Thales/ Alenia Space Chinasat 6B payload?  A friend intercepted the Chinese HF jammer, FIRE DRAKE, on 9560 KHz (AM, NSA signal type S1B, broadcast music) last week.  As a former satellite payload designer myself, I was very interested in how the transmit antenna is designed -- I assume it is probably a giant, unfurlable LPDA. 

Secondly, can we infer from the FIRE DRAKE frequencies that the purpose of the jammer is to deny access to HF agent communications, whether numbers stations or code phrases embedded in entertainment and news broadcasts, by foreign agents (such as Taiwanese, German and British) operating within the coverage area of Chinasat 6B?

Or, am I only stirring up wild speculation?

Offline Josh

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Re: Chinasat 6B and FIRE DRAKE Jammer
« Reply #1 on: April 11, 2017, 0015 UTC »
Just saw this post and have to say the firedrakes are terrestrial, not orbiting.
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Offline MDK2

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Re: Chinasat 6B and FIRE DRAKE Jammer
« Reply #2 on: April 11, 2017, 0213 UTC »
Nothing so dramatic. The Firedrake shows up on the same frequencies as unwanted foreign broadcasts aimed at China, most notably those of Radio Free Asia's Mandarin broadcasts. The PRC's preferred method of jamming is to overwhelm them with their own programming rather than white noise, so either the Firedrake or China National Radio 1 are used, broadcasting at high power transmissions on the same frequencies. Here in America you can often hear the RFA broadcast together with the jamming since it's transmitted from Pacific locations closer to us than China, but I'm sure people there have no chance to hear it. (I've checked a web SDR based in Hong Kong when I noted I could hear both, and confirmed that only the Firedrake is audible there.)

Josh, it's been reported that the Firedrake originates from Chinasat 6B, which beams it to the different transmitters that do the jamming. Apparently that controls the transmissions so that they're all in sync. Someone who copied the actual satellite beam has CD quality audio which is posted to youtube, but apparently you can buy a CD if you really wish to have your own hard copy.

https://www.youtube.com/watch?v=FHsSyfj6uEg
« Last Edit: April 11, 2017, 0320 UTC by MDK2 »
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Offline Josh

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Re: Chinasat 6B and FIRE DRAKE Jammer
« Reply #3 on: April 11, 2017, 1549 UTC »
Lol thanks for the info, think I've heard it often enough to forgo the cd purchase. It'd be funny if someone replaced the feed to the sat with their own programming.
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Offline MDK2

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Re: Chinasat 6B and FIRE DRAKE Jammer
« Reply #4 on: April 11, 2017, 1635 UTC »
Radio Free Whatever would be a great replacement. Those Chinese jammers lack imagination.
Denver, CO.
SDRPlay RSP2pro, Icom IC-7100, Grundig Satellit 750, Tecsun PL-600.
W6LVP active loop, homebrewed mag loops.
eQSLs appreciated wickerjennie at gmail

Offline skeezix

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Re: Chinasat 6B and FIRE DRAKE Jammer
« Reply #5 on: April 18, 2017, 0214 UTC »
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