DSN Corporation


DSN Corporation 株式会社ディー・エス・エヌ is a corporation owned by SKY Perfect JSAT Group, NEC and NTT Com. It was founded on December 19, 2012 for the sole purpose of acting as an investment vehicle in the private finance initiative that would handle the Japanese military X band DSN satellite network from 2015 to 2031.

History

along NEC, NTT Com and Maeda Corporation formed a joint venture called DSN Corporation. On January 15, 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 DSN satellite network.
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.
The plan called for the launch of the first satellite in December 2015, with a start of operations in March 2016 and a termination of operations on April 2030. The second satellite 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.
JSAT role is the procurement and general management of the satellites. The first satellite, DSN-1, is actually an additional payload on one of JSAT's own satellites, Superbird-8. The second satellite, DSN-2 is a dedicated spacecraft.
On April 25, 2014 JSAT announced that it had placed an order with MELCO and its satellite platform DS2000 for its Superbird-8 satellite. It would replace Superbird-B2 and be positioned on the 162°East orbital slot.
On an earning revision, JSAT disclosed that they had confirmed container deformation after Superbird-8/DSN-1 arrived to its launch site. In July 2016, it was published that a May 25 mishap during air transport 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.

Satellite network

The initial plan calls for two satellites: DSN-1 or Kirameki-1 and DSN-2 or Kirameki-2. DSN-1 was supposed to be launched in 2015, but was delayed for early 2016. It was damaged during transport to the launch site on May 25, 2016, and repairs might take up to two year. The schedule has not been updated as of August 2016, but DSN-2 might be launched before DSN-1.
ProjectNameBusPayloadOrderLaunchLaunch VehicleLaunch ResultLaunch WeightStatusRemarks
DSN-2Kirameki-2NEC NX-GX band military payloadH-IIA 204Managed for the DSN Corporation on behalf of the Japanese Military.
DSN-1Kirameki-1
DSN-1
Superbird-B3		DS2000X band military payload and JSAT's Ku band, Ka band2014Ariane 5 ECADSN-1 Payload for the Japanese Military. Replacement for Superbird-B2.