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  3. Outline of Radio Monitoring
  4. Maintenance of Radio Monitoring Facilities
  5. Maintenance Plans on Radio Monitoring Facilities

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   First Term@` Third Term
(1993-2001)
Fourth Term
(2002-2004)
Fifth Term
(2005-2007)
Sixth Term
(2008-2010)
Focus Plan ·Specification of cities with populations of not less than 50,000 inhabitants as radio monitoring areas
·Improvement of Radio Monitoring Facility
·Installation of automatic Radio Monitoring @system designed to 24-hours radio monitoring
·Specification of cities with populations of not less than 30,000 inhabitants and receive constant reports on interference or disturbance as radio monitoring areas.
·Improvement and enhancement of direction finding precision at prefectural capitals
·Improvement of radio monitoring facilities
·Installation of Space Radio Monitoring Facility
·Maintenance and operation existing facilities
·Improvement and enhancement of direction finding precision at prefectural capitals
·Improvement and enhancement direction finding precision of radio monitoring facilities at the adjacent area of DEURAS-Ds
·Improvement of Radio Monitoring Facility
·Installation of Space Radio Monitoring Facility
·Maintenance and operation existing facilities
·Improvement and enhancement of direction finding precision at prefectural capitals
·Improvement of Radio Monitoring Facility
·Installation of Space Radio Monitoring Facility
·Maintenance and operation existing facilities
Detect Unlicensed Radio Stations- Receiver (DEURAS-R) ·Tokyo and the other major cities designated by government ordinance
·Location of the Regional Bureau of Telecommunications
·Wide flatlands (Kanto , Osaka , Nobi plain, etc)
·The Inland Sea of Japan and major airports
·Prefectural capitals on a scale higher than or equal to those cities targeted in the First Term
·Prefectural capitals other than those targeted in the Third Term
·Replacement of DEURAS-Rs located at prefectural with DEURUS-Ds
·Update of existing facilities
·Replacement of DEURAS-Rs with DEURAS-Ds
·Improvement of DEURAS-Ds located at prefectural capitals
·Update of existing facilities
·Replacement of DEURAS-Rs with DEURAS-Ds
·Improvement of DEURAS-Ds including analytical functions
·Update of existing facilities
Detect Unlicensed Radio Stations- Receiver (DEURAS-R) ·Local core cities , with a focus on prefectural capitals
·Cities that have populations of not less than 50,000 inhabitants outside the radio monitoring areas for DEURAS-D
·Cities that have populations of not less than 30,000 inhabitants outside the radio monitoring areas for DEURAS-D and receive the same or higher number of reports on interference or disturbance , compared to those targeted in the Second Term
Detect Unlicensed Radio Stations-HF Direction Finder (DEURAS-H) ·T@locations ·Update of existing facilities ·Update of existing facilities ·Update of existing facilities
Detect Unlicensed Radio Stations- Mobile (DEURAS-M) ·18 platforms ·Update of existing equipment ·Update of existing equipment ·Update of existing equipment
Space Radio Monitoring Facility Preparation of the center station and the fixed monitoring station to maintain surveillance over the L/Ku/Ka band in the Kanto area    ·Existing facilities to be update
( L/Ku/Ka band )
·Existing facilities to be update ( L/ S/C/Ku/Ka )
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Copyright(C)Telecommunications Bureau of the Ministry of Internal Affairs and Communications All Rights Reserved.