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)
MissionCommunications
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
Stabilization3-axis
Equipment12 C-band, 12 Ku-band
DC power 5000 W
Design lifetime 12 years

Location:

DatePositionRemarks
 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 Home