JCSAT-4 --> INTELSAT 26

Japan

Int. spacecraft nº:

Japanese spacecraft nº: 81

Also called Jcsat 1A - Service name: JCSAT R
Become: INTELSAT 26 in 2009

Launch data:

Designation	24732 / 97007A
Launch date	17 Feb 1997 - 01:42:02 UT
Launch site	CC, LC36B
Launch vehicle	Atlas 2AS (AC-127)
Mission	Communications
Geostationary orbit on:
Perigee / Apogee	35771 x 35815 km
Eccentricity
Inclination	6.9 deg
Period	1436.1 min

Satellite ordered after a Jcsat 1 problem (slight leak) was detected

Specifications

Prime contractor	Hughes
Platform	HS-601 (#58)
Mass at launch
Mass in orbit	1841 kg
Dimension	stowed: 2.8 x 3.8 x 4.9 m
Solar array	26.2 m span
Stabilization	3-axis
Equipment	12 C-band, 12 Ku-band
DC power	5000 W
Design lifetime	12 years

Location:

Date	Position	Remarks
17 Feb 1997-Apr 1997	141° E
May 1997-Feb 1998	150° E	became Jcsat 1A
Mar 1998-Jun 1999	124° E	became Jcsat R on 15 Jun 1999
Jul 1999	127° E
Aug 2009	150° E	Now Intelsat IS-26

Features 4 octagonal communications antennas. The main control station is in Yokohama, with backup control at Gunma.

C-band

Main transponders	12
Backup transponders
Power	34 W (SSPA)
Bandwidth	36 MHz
Coverage	Asia & Australia
EIRP max	37 dBW
Polarization	linear

Ku-band

Main transponders	28
Backup transponders
Power	60 W (TWTA) + four 90 W (TWTA) for 4 36 MHz transponders
Bandwidth	8 transponders of 36 MHz 16 transponders of 27 MHz (4 transponders can be switched to 54 MHz with 120 W)
Coverage & EIRP max	Japan: 55 dBW Eastern Asia, India & Australia: 43-35 dBW
Polarization	Linear

Ref.: #7(JR725), #15 - update: 03.06.16