Mission typeCommunications
OperatorDSN Corporation
COSPAR ID2017-005A
SATCAT no.41940
Mission duration15 years (planned)
Spacecraft properties
Spacecraft typeDSN
BusDS-2000 [1]
ManufacturerMitsubishi Electric [1]
Start of mission
Launch date24 January 2017, 07:44:00 UTC
RocketH-IIA 204
Launch siteTanegashima, LA-Y
ContractorMitsubishi Heavy Industries
Entered serviceMarch 2017
Orbital parameters
Reference systemGeocentric orbit
RegimeGeostationary orbit
Coverage areaJapan
← DSN-1

DSN-2, also known as Kirameki-2, is a geostationary communications satellite to be operated by DSN Corporation, a subsidiary of SKY Perfect JSAT Group. Its payload is a pure X-band and will be used for military communications by the Japanese military. It was launched and successfully deployed on 24 January 2017 using a H-IIA rocket flying in its heaviest configuration, the H-IIA 204.[2] It is Japan's first dedicated military communication satellite and is designed for at least fifteen years of service.


JSAT along NEC, NTT Communications and Maeda Corporation formed a joint venture called DSN Corporation. On 15 January 2013, DSN Corporation announced that it had closed a contract with the Ministry of Defense to execute the "Program to Upgrade and Operate X-Band Satellite Communications Functions, etc". The contract is a private finance initiative, where private funds, management and technical capabilities are used to upgrade and operate the Japanese military X-band satellite network.[3]

Based on this program, DSN Corporation will manufacture and launch two satellites plus perform the necessary upgrades to ground control stations. It will also operate, manage and maintain the facilities and equipment through fiscal years 2015 to 2030. The total program cost was estimated at ¥122,074,026,613.[3]

The plan called for the launch of the first satellite, DSN-1, on December 2015, with a start of operations in March 2016 and a termination of operations in April 2030. The second satellite, DSN-2, was expected to launch in January 2017, starting operations in March 2017. The program and the operations of the second satellite were expected by March 2031.[3]

JSAT role is the procurement and general management of the satellites.[3] The first satellite, DSN-1, is actually an additional payload on one of JSAT's own satellites, Superbird-8.[4] The second satellite, DSN-2 is a dedicated spacecraft to be built by Mitsubishi Electric.[1]

In July 2016, it was published that a 25 May 2016 mishap during air transport of DSN-1 had delayed the satellite launch by an estimated two years. A dislodged tarpaulin had blocked the bleed valve on the satellite container and the spacecraft had suffer from over pressurization damage.[5]

See also


  1. ^ a b c "SKY Perfect JSAT Group Earning Results Briefing for 2Q/2016". Sky Perfect JSAT. 4 November 2016. Retrieved 27 November 2016.
  2. ^ Graham, William (23 January 2017). "Japanese H-IIA rocket launches DSN-2 military satellite". NASASpaceFlight.com.
  3. ^ a b c d "Execution of a Program to Upgrade and Operate X-Band Satellite Communications Functions by the Subsidiary" (PDF). SKY Perfect JSAT. 15 January 2013. Retrieved 28 July 2016.
  4. ^ Krebs, Gunter (21 April 2016). "Superbird 8 / DSN 1 (Kirameki 1)". Gunter's Space Page. Retrieved 30 August 2016.
  5. ^ Kubo, Nobuhiro (19 July 2016). "Tarpaulin delays Japanese military communications satellite by two year". SpaceNews. Retrieved 3 August 2016.