Insat-2 E

India

International Sat. n°:

Indian satellite n°: 28

Also called Intelsat APR1

Launch data:

Designation:	25666 / 99016A
Launch date	02 Apr 1999 - 22:03 UT
Launch site:	Ko, ELA2
Launch vehicle:	Ariane-42P (V-117)
Mission:	Telecommunications and meteorology
Geostationary orbit on:
Perigee / Apogee	km
Eccentricity
Inclination	deg
Period	min
Location	83°E

Become operational on 18 May 1999. Intelsat payed India's Department of Space $100 million over 10 years, for the use of 11 transponders.

Specifications:

Prime contractor	ISRO/ISAC
Platform	INSAT2
Mass at launch	2550 kg
Mass in orbit	1526 kg
Dry mass	1148 kg
Dimension	1.93 x 1.77 x 2.3 m
Solar array	24.7 m
Stabilization	3-axis
DC power	2143 W (60 Ah Nickel-Hydrogen batteries)
Design lifetime	12 years

VHRR (Very High Resolution Radiometer):

Wave bands	0.55-0.75 µm (visible) 10.5-12.5 µm (IR) + a water vapour band
Resolution	visible: 2 km IR: 8 km
Image repeat frequency	30 minutes

The satellite also carries a Charged Coupled Device (CCD) camera with one kilometre resolution (compared to VHRR's best of 2 km). The CCD camera's higher resolution would allow better tracking of cloud movements and more accurate estimation of winds.

C-band

Main transponders	15 + 2
Backup transponders
Power	10 x 32 W 7 x 60 W
Bandwidth	15 x 36 MHz 2 x 72 MHz
Coverage & EIRP max	Quasi global Wide beam: 36 dBW Zone: 36 dBW
G/T max
Polarization	linear (uplink: H, downlink: V)
Frequencies	uplink: 5.850 - 6.650 GHz downlink: 3.400 - 4.200 GHz

Beacons: 4.190976 GHz (primary) and 4.197504 GHz (maneuver)

Transponder frequency chart (GHz):

Horizontal Uplink	Transponder	Vertical Downlink	Intelsat use	Beams (uplink/dowlink)
6.470	1	3.445	yes	wide/zone
6.510	2	3.485	yes	wide/zone
6.550	3	3.525	yes	wide/zone
6.590	4	3.565	yes	wide/zone
6.630	5	3.605	yes	wide/zone
5.890	6 (72 MHz)	3.665	yes	wide/wide
5.950	7	3.725		wide/zone
5.990	8	3.765		wide/wide
6.030	9	3.805		wide/zone
6.070	10	3.845		wide/wide
6.110	11	3.885		wide/zone
6.150	12	3.925		wide/wide
6.190	13	3.965		wide/zone
6.230	14	4.005	yes	wide/wide
6.270	15	4.045	yes	wide/wide
6.310	16	4.085		wide/zone
6.370	17 (72 MHz)	4.145	yes	wide/wide

Ref: #7, #120 - update: 22.02.07