Insat 3C

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General

Designation	27298 / 02002A
Launch date	23 Jan 2002
Country of origin	India
Mission	Telecommunications
Geostationary orbit	74°E
Launch vehicle	Ariane V147

Cost: $53 million for the satellite, $77 million for the launch. Should replace Insat 2R and Insat 2C.

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Location

Begin	End	Position
L: Jan 2002	Jan 2017	74°E
Mar 2017	Jul 2017	93.5°E, inclined

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End of life

Out of service	Jul 2017
Cause	Sent to the junk orbit

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External resources

sat-index articles

Technical data

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Lyngsat transponder loading

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EIRP coverage (dBW)

S-band

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Specifications

Prime contractor	ISRO
Platform	INSAT 3
Mass at launch	2750 kg
Dry mass	1050 kg
Dimension	2.8 x 1.7 x 2.0 m (15.4 m span in orbit)
Solar array
Stabilization	3-axis
DC power	EOL: 3250 W
Design lifetime	15 years

No weather payload

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S-band MSS

Main transponders	1
Backup transponders
Power	70 W (TWTA)?
Bandwidth	20 MHz
Coverage
EIRP max	37 dBW
G/T max	-7.5 dB/K
Polarization	circular
Frequencies	uplink (return): 2670-2690 MHz downlink (forward): 2500-2520 MHz

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S- and C-band MSS transponder frequency chart (GHz)

C-band uplink	S-band Downlink	Transponder	S-band Uplink	C-band downlink	Remarks
6.460	2.510	33/34	2.680	3.690

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S-band BSS

Main transponders	2
Backup transponders	0
Power	70 W (TWTA)?
Bandwidth
Coverage
EIRP max	42 dBW
G/T max	-5 dB/K
Polarization	circular
Frequencies	uplink: 5850-5930 MHz downlink: 2550-2630 MHz

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S-band BSS transponder frequency chart (GHz)

LHCP Downlink	Transponder	RHCP Uplink	Remarks
2.570	31	5.870
2.610	32	5.910

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C-band

Main transponders	24
Backup transponders
Power	15 W
Bandwidth
Coverage & EIRP max	36 dBW
G/T max	-5 dB/K
Polarization
Frequencies	uplink: 5930-6410 MHz downlink: 3705-4185 MHz

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C-band Extended

Main transponders	6
Backup transponders
Power	15 W
Bandwidth
Coverage & EIRP max	36 dBW
G/T max	-5 dB/K
Polarization	linear crossed
Frequencies	uplink: 6755-6995 MHz downlink: 4530-4770 MHz

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C-band transponder frequency chart (GHz)

Horizontal Uplink	Horizontal Downlink	Transponder	Vertical Downlink	Vertical Uplink	Remarks
	3.725	1		5.950
5.970		13	3.745
	3.765	2		5.990
6.010		14	3.785
	3.805	3		6.030
6.050		15	3.825
	3.845	4		6.070
6.090		16	3.865
	3.885	5		6.110
6.130		17	3.905
	3.925	6		6.150
6.170		18	3.945
	3.965	7		6.190
6.210		19	3.985
	4.005	8		6.230
6.250		20	4.025
	4.045	9		6.270
6.290		21	4.065
	4.085	10		6.310
6.330		22	4.105
	4.125	11		6.350
6.370		23	4.145
	4.165	12		6.390
6.410		24	4.185
6.775		25	4.550
6.815		26	4.590
6.855		27	4.630
6.895		28	4.670
6.935		29	4.710
6.975		30	4.750

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