North Korea jams South's guided missiles

Discussion in 'Indo Pacific & East Asia' started by LETHALFORCE, Mar 9, 2011.

  1. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    http://www.spacedaily.com/reports/North_Korea_jams_Souths_guided_missiles_999.html

    Seoul has accused North Korea of using sophisticated jamming systems to block South Korean military signals and disrupt its guided missiles.

    South Korea's Yonhap news agency said the strong jamming signals have been transmitting from the northern border city of Keasong since last week.

    The purported purpose of the jamming was to disrupt navigational devices using Global Positioning Systems as a major joint military exercise is under way northwest of Seoul.

    The jamming is believed to have prevented some U.S and South Korean bombs from hitting their targets during a military drill. The Korea Communications Commission said they caused minor inconvenience last week.

    "Intermittent GPS disruptions are still continuing, although signals are weak," the commission said in a statement, adding that it was working with government agencies and security authorities to shield against the jamming.

    The defense ministry also confirmed the jamming but refused to afford details citing security reasons.

    It is believed that Pyongyang has modified Russian equipment to make its own jammers, which can interfere with GPS up to 50 miles away.

    The U.S.-South Korean annual Key Resolve drill kicked off Feb. 28. More than 12,000 U.S. troops are taking part in the drill, alongside 200,000 South Korean soldiers. The exercise, including live drills and computer simulated war games, is expected to run for 11 days.

    South Korea and the United States stage regular exercises with their combined forces. The recent drill, though, comes amid heightened tension with North Korea.

    Both Seoul and Washington have invited media to cover several of the drills scheduled for the coming weeks, including when railroads are used to move weapons and the air landing of troop reinforcements from other countries.

    Relations between North and South have soured since North Korea's suspected sinking of a South Korean war ship last March and Pyongyang's artillery shelling of a South Korean island in November.

    GPS jammers work by sending a signal that interferes with the communication between a satellite and GPS receiver.

    South Korea is also purported to use French made equipment to disrupt or monitor the North's military communications systems.

    Military officials said the jamming coincided with cyberattacks on the Web sites of about 30 key government agencies and financial institutions in South Korea. The origins of those attacks have yet to be determined.

    The Korea Communications Commission said that more than 77,200 "zombie" computers were mobilized for the latest attack. The viruses destroyed the hard disks of 114 of them.
     
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  3. Tshering22

    Tshering22 Sikkimese Saber Senior Member

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    Never knew North Korea had the technology to even jam their civilian radars, let alone military ones. Guess CCP has been arming its rabid friend too well recently.
     
  4. bhramos

    bhramos Elite Member Elite Member

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    May be CCP is testing its systems on US based GPS.......
     
  5. sayareakd

    sayareakd Moderator Moderator

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    [​IMG]

    Display card text reads (I think) as:

    Jamming Transmitter for GPS/GLONASS Satellite Navigation Receivers

    Function - Disrupts correct measurement of geographic coordinates by satellite navigation receivers

    Technical Characteristics


    Operating Range - 150-200 km


    Output Power - 4 W


    Antenna Gain Factor - 3-5


    Transmitter Weight (without power supply) - 8-10 kg


    Power Consumption - <25 W


    Electrical Requirements - +15V 1.5A; -6V 1.5A


    Text for the left knob: Freq Dev (0-6 MHz)

    Text for the right knob: FM Mod (44-270 Hz)

    271454Z AUG 97SUBJ: RUSSIAN AVIACONVERSIA PORTABLE GPS AND GLONASS JAMMER
    SYSTEM (U)

    SUMMARY:

    (U) CONFEX - THE RUSSIAN FIRM AVIACONVERSIA MARKETED AND DISPLAYED ITS
    PORTABLE GPS AND GLONASS JAMMER AT THE MOSCOW AIR SHOW '97, 19-24 AUG 97, IN
    MOSCOW, RUSSIA. THE 4-WATT JAMMER JAMS CIVILIAN AND MILITARY FREQUENCIES OF
    GPS AND GLONASS UP TO A RANGE OF 200 KM. PROTOTYPE AT THE SHOW - LOOKING FOR
    BUYERS.

    TEXT:

    1. (U) THE REPORTING OFFICER (RO) SPOKE WITH DR. OLEG ((ANTONOV)), DIRECTOR
    OF AVIACONVERSIA (ADDRESS - 103009 MOSCOW, TVERSCAYA, D.27-2, OFFICE-88,
    TELEPHONE/FAX +095 2995454) ABOUT THE GPS/GLONASS JAMMER AT THE MOSCOW AIR
    SHOW '97, IN MOSCOW, RUSSIA. THE JAMMER SHOWN IN ENCL 1 AND 2 IS FULLY
    FUNCTIONAL - THIS IS NOT A CONCEPT. DR. ANTONOV SAID THAT HIS COMPANY WAS
    WITHIN A WEEK OF FINALIZING THE NEXT GENERATION GPS/GLONASS JAMMER THAT
    REDUCES THE SIZE AND MASS OF THE JAMMER BY SLIGHTLY OVER 50 PERCENT. DR.
    ANTONOV SAID THAT HE HAS ALREADY RECENTLY MARKETED THE JAMMER IN THE MIDDLE
    EAST AND SAID HE HAS SEVERAL POTENTIAL CUSTOMERS THERE. HE DECLINED TO
    ELABORATE FURTHER AS TO WHO MAY HAVE ALREADY CONTRACTED FOR HIS JAMMER. DR.
    ANTONOV SAID THE SOPHISTICATION OF THE SIGNAL JAMMERS WAS BEYOND THE
    TECHNICAL ABILITY OF HIS MIDDLE EASTERN CUSTOMERS. HE SAID THAT BESIDES
    RUSSIA, ONLY FRANCE, THE UNITED STATES, GERMANY, ITALY, SWEDEN/NORWAY, AND
    POSSIBLY ISRAEL ARE ABLE TO BUILD THESE SOPHISTICATED SIGNAL GENERATORS. TO
    INSURE THE BOX WAS ACTUALLY FUNCTIONAL, THE RO ASKED FOR DR. ANTONOV TO
    DEMONSTRATE THE SYSTEM. DR. ANTONOV AGREED TO AND BEGAN TO CONNECT THE POWER
    SUPPLY. WHEN TH RO ASKED IF HIS JAMMING MAY INTERFERE WITH AIRCRAFT IN THE
    VICINITY, DR. ANTONOV SAID THAT WHILE SOME PILOTS USE GPS AS PART OF THEIR
    NAVIGATION PACKAGE, GPS IS NOT LISTED INTERNATIONALLY ANYWHERE AS AN
    AIRCRAFT COMPONENT AND INDICATED ITS NAVIGATION USE CONSEQUENTLY DID NOT
    NEED TO BE RESPECTED. AT THIS POINT, THE RO DID NOT WANT TO BECOME
    POTENTIALLY PARTIALLY RESPONSIBLE FOR ANY AVIATION MISHAP THAT MIGHT RESULT.
    INSTEAD OF TURNING ON THE JAMMER, THE RO ASKED DR. ANTONOV TO UNSCREW THE
    BACK ASSEMBLY AND HEAT SINK SO THAT THE RO COULD INSPECT THE COMPONENTS. DR.
    ANTONOV TOLD THE RO THAT THE JAMMER HAD TWO MODULES. THE FIRST MODULE
    CONTAINED FOUR SIGNAL GENERATORS THAT INDIVIDUALLY JAMMED THE FREQUENCIES OF
    CIVILIAN GPS, MILITARY GPS, CIVILIAN GLONASS, AND MILITARY GLONASS. AS DR.
    ANTONOV WAS STARTING TO UNSCREW THE PLATES, THE RO KNEW THAT HE WAS LOOKING
    AT A FUNCTIONAL DEVICE.

    2. (U) THE GPS/GLONASS JAMMER HAS AN OUTPUT POWER OF 4 WATTS AND CAN
    EFFECTIVELY DENY USE OF GPS IN AN AREA RANGING AS FAR AS 150-200 KM. DR.
    ANTONOV SAID THAT HE HAS ALREADY WORKED IN CONJUNCTION WITH THE RUSSIAN
    MILITARY WITH DIRECTIONAL ANTENNAS FOR HIS JAMMER SO THAT IT CAN BE USED TO
    DIRECTIONALLY JAM WHILE MAINTAINING SAFE AREAS FOR FRIENDLY FORCES TO ACCESS
    GPS OR GLONASS. THE COEFFICIENT OF ANTENNA AMPLIFICATION RANGES FROM 2-5,
    DEPENDING ON THE TYPE OF ANTENNA USED. THE ELECTRICAL INPUT SUPPLY IS EITHER
    BATTERY OR DC LINE VOLTAGE. DR. ANTONOV PRODUCED BOTH 15 V AND 6 V SUPPLIES
    THAT RAN OFF OF 230 VOLTS LINE INPUT. THE JAMMER DISSIPATES 25 WATTS WHEN IN
    USE AND WEIGHS BETWEEN 8-12 KG WITHOUT BATTERIES, DEPENDING ON THE
    CONFIGURATION. IN THE FRONTAL VIEW OF THE JAMMER SHOWN IN BOTH ENCL 1 AND 2,
    TWO KNOBS CAN BE SEEN AT THE BASE. THE LEFT KNOB IS FOR FREQUENCY
    MODULATION, AND RANGES FROM 0-6 MHZ. THE RIGHT KNOB IS FOR "VELOCITY CHANGE
    OF MODULATION" AND RANGES FROM 44-270 HZ. A PORTION OF THE ABOVE DATA IS
    CONTAINED IN ENCL 3, WHICH IS IN RUSSIAN. THE RO HAD ENCL 3 LOOSELY
    TRANSLATED, VERBALLY.

    3. (U) DR. ANTONOV SAID HIS NEXT TESTING WOULD BE ON AN AIRBORNE PLATFORM,
    WITH THE ASSISTANCE OF THE RUSSIAN MILITARY. HE SAID THAT, IN A PREVIOUS
    TEST, FOUR TYPES OF GPS AND GLONASS DEVICES, TO INCLUDE ONE PRODUCED BY
    MAGELLAN, WERE SUBJECTED TO JAMMING AT REMOTE DISTANCES AND ALL THE
    NAVIGATION DEVICES FAILED IN THE FACE OF THE JAMMING. HE SAID THAT HE HAD
    STRONG INDICATIONS THAT HIS TEAM, WORKING WITH THE RUSSIAN MILITARY,
    SUCCESSFULLY JAMMED A DEVICE WITH P-CODE CAPABILITY. WHEN THE RO ASKED FOR
    MORE DETAIL ON THIS, DR. ANTONOV WOULD NOT ELABORATE

    http://www.qsl.net/n9zia/wireless/gps_jam-pics.html
     
  6. Patriot

    Patriot Senior Member Senior Member

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    This is very interesting development. Can this type of system be more effective than missile defense shield ?or it may make MDS more effective as being part of it.
     
  7. sayareakd

    sayareakd Moderator Moderator

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    Well it is old development, In Gulf war II, Iraq used similar system to jam GPS, when US find out they send search planes to find the location of the system then they used laser guided bomb to destroy the location where GPS was kept.

    So the moral of the story is you have to use the system smartly and it can achieve the desired result, instead of having the system on site they should have put it on truck/ jeep and moved the same to confuse the counter attackers.

    I am thinking if the cruise missile is guided by GPS then this device is great to counter them from achieving their target.
     
  8. Tshering22

    Tshering22 Sikkimese Saber Senior Member

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    ROK does not have advanced strategic assets of her own and relies on US shield to protect its neck from a DPRK invasion. Hence it is all the more risky for them to continue this pacifist constitution that US has imposed on them and Japanese (for now forget Japanese since they are in too much trouble already).
     

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