Names JCSAT-13
Mission type Communication
Operator SKY Perfect JSAT Group
COSPAR ID 2012-023A
SATCAT № 38331
Website JSAT Official Page
Spacecraft properties
Spacecraft JCSAT-4B
Bus A2100[1]
Manufacturer Lockheed Martin
Launch mass 4,528 kg (9,983 lb)
Start of mission
Launch date 22:13:00, June 15, 2012 (2012-06-15T22:13:00)[2]
Rocket Ariane 5 ECA
Launch site Guiana Space Center ELA-3
Contractor Arianespace
Orbital parameters
Regime GEO
Longitude 124° East
Band 32 × 27 Mhz and 12 × 36 MHz Ku band
Bandwidth 1,296 MHz
TWTA power 150 W[3]


JCSAT-4B, known as JCSAT-13 before launch, is a geostationary communications satellite operated by SKY Perfect JSAT Group (JSAT) which was designed and manufactured by Lockheed Martin on the A2100 platform.[4][1]

Satellite description

The spacecraft was designed and manufactured by Lockheed Martin on the A2100 satellite bus. It had a launch mass of 4,528 kg (9,983 lb) and a 15 year design life. As most satellites based on the A2100 platform, it uses a 460 N (100 lbf) LEROS-1C LAE for orbit raising.[4]

Its payload is composed of thirty-two 27MHz and twelve 36MHz Ku band transponders, for a total bandwidth of 1.296 GHz, and its used primarily for multi-channel pay per view business.[5][6] Besides the main beam, it has two steerable beams that enables it to reconfigure in orbit its services.[5][6]

It's mainly used for broadcasting digital televisions channels It has two fixed beams named Japan Beam and South East Asia Beam. The former offers coverage from the Middle and Near East through South West Asia, South East Asia and Oceania. With the latter mainly covering Indonesia and Malaysia. In addition to the two fixed beams, it offers two steerable beams to cover zones where demands has surpassed the fixed beam capacity.[7]


On April 16, 2009 JSAT made its seventh order for an A2100-based satellite from Lockheed, the JCSAT-13. It would feature 44 Ku band transponders with two steerable antennas for on-orbit reconfiguration. It was to be launched in 2013 for the 124°East slot where it would replace JCSAT-4A.[5] The next day, April 17, Arianespace announced that they had secured the contract to launch JCSAT-13 on an Ariane 5 ECA.[8]

On March 23, 2012, JSAT announced that the expected launch date for JCSAT-13 was May 15. Also, that it would replace JCSAT-4A at the 124° East slot to offer the SKY PerfecTV! digital broadcasting service.[7] As scheduled, on May 15 as 22:13 UTC, an Ariane 5 ECA, successfully launched JCSAT-13 and Vinasat-2 to a geostationary transfer orbit.[9] JCSAT-13 separated from the top berth at 22:39 UTC, and first signals were acquired at 23:20 UTC.[2][9] After the launch success, JCAST-13 was renamed JCSAT-4B.[4]

On the same day of the launch, JSAT announced an agreement with the Lippo Group to use JCSAT-4B to offer a direct-to-home satellite TV broadcast service across Indonesia.[10] After reaching the 124°East, it was commissioned into service on July 10, replacing JCSAT-4A.[11]


  1. 1 2 "JCSat 4B (JCSat 13)". Satbeams. Retrieved 26 July 2016.
  2. 1 2 Bergin, Chris (May 15, 2012). "Ariane 5 ECA launches JCSAT-13 and VINASAT-2 into orbit". NASASpaceFlight.com. Retrieved 2016-08-09.
  3. "JCSAT-4B". SKY Perfect JSAT Group. Retrieved August 9, 2016.
  4. 1 2 3 Krebs, Gunter Dirk (2016-04-21). "JCSat 13 (JCSat 4B)". Gunter's Space Page. Retrieved 2016-07-20.
  5. 1 2 3 "SKY Perfect JSAT Awards Lockheed Martin Contract To Build JCSAT-13 Communications Satellite". Icaa.eu. Lockheed Martin Space Systems. April 16, 2009. Retrieved 2016-08-05.
  6. 1 2 "Who we are". SSKY Perfect JSAT Group. 2012-08-03. Archived from the original (PDF) on 2016-09-08. Retrieved 2016-08-02.
  7. 1 2 "Notice of the Launch Schedule for the JCSAT-13 Communications Satellite" (PDF). SKY Perfect JSAT Group. March 23, 2012. Retrieved August 9, 2016.
  8. "Arianespace Secures JCSAT-13 Launch Deal". April 20, 2009. Retrieved 2016-08-05.
  9. 1 2 "Notice Regarding Successful Launch of the JCSAT-13 Communications Satellite" (PDF). SKY Perfect JSAT Group. May 16, 2012. Retrieved August 9, 2016.
  10. "Lippo Group selected JCSAT-13 for its satellite broadcast service" (PDF). SKY Perfect JSAT Group. May 16, 2012. Retrieved August 9, 2016.
  11. "Lockheed Martin-Built JCSAT-13 Satellite Begins Service for Sky Perfect JSAT of Japan". Icaa.eu. Lockheed Martin Space Systems. July 10, 2012. Retrieved 2016-08-05.
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