RE: North Korea satellite: search elements

From: David Tiller (
Date: Thu Apr 12 2012 - 19:35:14 UTC

  • Next message: Ted Molczan: "RE: North Korea satellite: search elements"

    I disagree that 470 MHz is an ISM band in the US - according to paper page 497 of the 2010 Title 47 CFR Part 2.106, 470 MHz straddles the boundary between several non-ISM allocations.
    The first column of that chart is for international allocations and the second in for US allocations. I agree there are several low-power devices in there, but not traditional ISM stuff.
    With regard to other uses of freqs around 470 MHz, there is a whole slew of footnotes relating to the 470+-MHz band starting on paper page 551 with footnote 5.289 that states:
    5.289 Earth exploration-satellite service 
    applications, other than the meteorological- 
    satellite service, may also be used in the 
    bands 460–470 MHz and 1690–1710 MHz for 
    space-to-Earth transmissions subject to not 
    causing harmful interference to stations operating in accordance with the Table.
    Subsequent footnotes show that many countries in that area use the 470+ MHz band for Space-to-Earth comms.
    It's interesting to note the the DPRK is mentioned 14 times in a US Federal Code document (search for 'of Korea'). 
    Link to PDF:
    David Tiller
    Lead Consultant/Architect | CapTech
    (804) 304-0638 |
    From: [] on behalf of Robert Knight []
    Sent: Thursday, April 12, 2012 2:36 PM
    Subject: Re: North Korea satellite: search elements
    In the United States, 470 MHz is part of the unlicensed “ISM” (Industrial,
    Scientific and Medical) band -- often used for such protocols as WiFi,
    Bluetooth, Z-Wave, *etc.*  It’s also referred to as a “TV white space,” or
    unused television broadcasting frequency.
    However, in the DPRK (“North Korea”), the 470 MHz frequency has been
    adopted by the Korea Communications Commission as a digital TV frequency,
    corresponding to DPRK’s digital channel 14, part of a new nationwide
    television service.
    Hence, Pyongyang’s announced plan to *“broadcast revolutionary songs at 470
    MHz,”* [thereby theoretically accessible to North Korean television
    consumers] is – on the face of it – *eminently plausible*, IMHO.
    *-Robert Knight
    Senior National Correspondent
    **"Five  O'Clock  Shadow"
    *WBAI . 99.5FM .
    On Thu, Apr 12, 2012 at 1:22 PM, <> 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
    > >_______________________________________________
    > >Seesat-l mailing list
    > >
    > _______________________________________________
    > Seesat-l mailing list
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