Re: North Korea satellite: search elements

From: Bob Christy (
Date: Thu Apr 12 2012 - 17:46:53 UTC

  • Next message: Robert Knight: "Re: North Korea satellite: search elements"

    470 MHz is a frequency published at the time of the Unha 
    2/Kwangmyongsong 2 launch in 2009. It may have been mentioned in the 
    context of the 1998 launch attempt also. K-m-s 2 was said to be 
    broadcasting a mixture of songs in praise of Kim Il Sung and Kim Jong 
    Il, and telemetry.
    In recent years, Iran has used the nearby frequency at 465 MHz. 480 MHz 
    was heavily populated by Chinese satellites at one time but it has now 
    been phased in out in favour of S-band and higher. There is a large list 
    of frequencies here: .You will need to 
    scroll down a bit to 465-480 MHz
    I have no idea what frequencies the launch vehicle might use.
    Bob Christy
    On 12/04/2012 18:22, wrote:
    > Good Morning:
    > I wonder if the 470 MHz region of the radio spectrum is heavily used in South Korea, China, or Japan. If 470 MHz is heavily used in the region, it would cast some doubt on North Korea's claim that they are launching a satellite.
    > After all, you would want to select a quiet portion of the spectrum for the satellite downlink to make the signal easier to hear.
    > If this is an ICBM test, it is logical to assume that the North Koreans would want to collect engineering data (radar tracking information, telemetry, and so on) during the entire flight in order to assess the vehicle's performance.
    > Have there been any reports of North Korean range support ships or trawlers being seen downrange? A logical location for such a ship would be near the third stage impact area or a potential payload splash point.
    > Regards,
    > Brian Webb
    > -----Original Message-----
    >> From: Martyn Williams<>
    >> Sent: Apr 12, 2012 9:00 AM
    >> To: Ted Molczan<>
    >> Cc:
    >> Subject: Re: North Korea satellite: search elements
    >> Ted,
    >> Subsequent to the original announcement, the North Koreans said the
    >> satellite will also broadcast revolutionary songs "at 470MHz."
    >> This is the same intention that was made last time. A more precise
    >> frequency wasn't mentioned.
    >> Martyn
    >>> The payload reportedly carries UHF and X-band transmitters. If anyone has reliable information on its precise radio
    >>> transmission frequencies, or advice on the most likely frequency ranges, please feel free to share via the list.
    >> -- 
    >> Martyn Williams
    >> 2012 Knight Journalism Fellow
    >> Stanford University
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