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DSN Corporation

From Wikipedia, the free encyclopedia

DSN Corporation
Native name
Hepburnkabushikigaisha dii·esu·enu
LiterallyDSN Corporation
TypeJoint venture
IndustrySatellite communications
FoundedDecember 19, 2012; 8 years ago (2012-12-19) in Tokyo, Japan
FoundersSKY Perfect JSAT Group, NEC and NTT Com
Headquarters1-14-14 Akasaka, Minato-ku, Tokyo, ,
Key people
Koki Koyama
ProductsDSN military satellites
Total equity¥1 Billion (2013)
Owner65.0% SKY Perfect JSAT Group
17.5% NTT Com
17.5% NEC
Footnotes / references

DSN Corporation Japanese: 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.[2]


SKY Perfect JSAT Group (JSAT) 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.[2]

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.[2]

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.[2]

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

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.[5]

On an earning revision, JSAT disclosed that they had confirmed container deformation after Superbird-8/DSN-1 arrived to its launch site.[6] 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.[7]

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.[7]

Project Name Bus Payload Order Launch Launch Vehicle Launch Result Launch Weight Status Remarks
DSN-2 Kirameki-2 NEC NX-G X band military payload N/A 2017-01-24 H-IIA 204 Success N/A Operational Managed for the DSN Corporation on behalf of the Japanese Military.[4]
DSN-1 Kirameki-1
DS2000 X band military payload and JSAT's Ku band, Ka band 2014 2018-04-05 Ariane 5 ECA Success N/A Operational DSN-1 Payload for the Japanese Military.[3] Replacement for Superbird-B2.[5]

See also


  1. ^ "Xバンド衛星通信中継機能等の整備・運営事業」の実施について" [Execution of a Program to Upgrade and Operate X-Band Satellite Communications Functions by the Subsidiary] (PDF) (in Japanese). SKY Perfect JSAT Corporation & Intelsat. January 15, 2013. Retrieved 2016-07-28.
  2. ^ a b c d e f "Execution of a Program to Upgrade and Operate X-Band Satellite Communications Functions by the Subsidiary" (PDF). SKY Perfect JSAT Corporation & Intelsat. January 15, 2013. Retrieved 2016-07-28.
  3. ^ a b c Krebs, Gunter Dirk (2016-04-21). "Superbird 8 / DSN 1 (Kirameki 1)". Gunter's Space Page. Retrieved 2016-07-20.
  4. ^ a b Krebs, Gunter Dirk (2016-04-21). "DSN 2 (Kirameki 2)". Gunter's Space Page. Retrieved 2016-07-20.
  5. ^ a b "SKY Perfect JSAT Procures Successor to Superbird-B2 Satellite" (PDF). SKY Perfect JSAT Corporation & Intelsat. April 25, 2014. Retrieved 2016-07-28.
  6. ^ "Revision of Consolidated Earnings Forecasts" (PDF). SKY Perfect JSAT Corporation & Intelsat. June 17, 2016. Retrieved 2016-07-28.
  7. ^ a b Kubo, Nobuhiro (July 19, 2016). "Tarpaulin delays Japanese military communications satellite by two year". Space News. Retrieved 2016-08-03.
This page was last edited on 29 July 2020, at 10:05
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