JCSAT 3

Japan

Int. spacecraft nº:

Japanese spacecraft nº: 75

Launch data:

Designation:	23649 / 95043A
Launch date	29 Aug 1995
Launch site	CC, LC-36B
Launch vehicle	Atlas-2AS (AC-117) (#94)
Mission	Telecommunications
Geostationary orbit on:
Perigee / Apogee	km
Eccentricity
Inclination	deg
Period	min
Location	128°E

GTO: 167 km x 81432 km x 23.5°

In 1995 leases were said to cost ¥550 million a year for 27 MHz transponders and ¥600 million a year for 36 MHz transponders.

Specifications:

Prime contractor	Hughes
Platform	HS-601
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
DC power	4600 W
Design lifetime	12 years

Location:

Date	Position	Remarks
Feb 2007	128° E	Retired

NEC Corp. of Japan is a major subcontractor to Hughes for the payload electronics.

C-band

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

Transponder frequency chart (GHz)

Horizontal downlink	Transponder	Vertical downlink
	C1	3.960
3.980	C2
	C3	4.000
4.020	C4
	C5	4.040
4.060	C6
	C7	4.080
4.100	C8
	C9	4.120
4.140	C10
	C11	4.160
4.180	C12

Ku-band

Main transponders	28
Backup transponders
Power	60 W (TWTA)
Bandwidth	16 transponders of 27 MHz 12 transponders of 36 MHz
Coverage & EIRP max	Japan: 55 dBW Eastern Asia, India & Australia: 43-35 dBW
Polarization	Linear

Transponder frequency chart (GHz)

Horizontal downlink	Transponder	Vertical downlink	Bandwidth (MHz)
	K1	12.258	36
12.288	K2		36
	K3	12.308	36
12.328	K4		36
	K5	12.348	36
12.368	K6		36
	K7	12.388	36
12.408	K8		36
	K9	12.428	36
12.448	K10		36
	K11	12.468	36
12.488	K12		36
	K13	12.508	27
12.523	K14		27
	K15	12.538	27
12.553	K16		27
	K17	12.568	27
12.583	K18		27
	K19	12.598	27
12.613	K20		27
	K21	12.628	27
12.643	K22		27
	K23	12.658	27
12.673	K24		27
	K25	12.688	27
12.703	K26		27
	K27	12.718	27
12.733	K28		27

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

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