INSAT-4A

INSAT 4A
Spacecraft properties

Mission type	Communications
Operator	ISRO
COSPAR ID	2005-049A
Website	INSAT 4A

Bus	I-3K
Launch mass	3,081 kilograms (6,792 lb)
Dimensions	2.8 x 1.7 x 2.0 m
Power	5,922 watts

Start of mission
Launch date	21 December 2005, 22:33 (2005-12-21UTC22:33Z) UTC
Rocket	Ariane 5GS
Launch site	Kourou ELA-3

Orbital parameters
Reference system	Geocentric
Regime	Geostationary
Longitude	83° East (0°N 83°E / 0°N +83°E / 0; +83Coordinates: 0°N 83°E / 0°N +83°E / 0; +83)
Inclination	74 degrees
Period	24 hours

Transponders
Band	12 K_u band 12 C-band
Bandwidth	36 megahertz
TWTA power	140 & 63 watts
EIRP	51 & 38 dbW

INSAT-4A, is the first one in the INSAT-4 Satellites series, providing services in the K_u and C band frequency bands. At the time of launch, it was the heaviest satellite India had produced and launched. The K_u transponders cover the Indian main land and C-Band transponders cover an extended area. It has a dozen K_u transponders and another dozen of C-band transponders. This spacecraft is placed at 83°E along with INSAT-2E and INSAT-3B, by Ariane launch vehicle (ARIANE5-V169)

Overview

INSAT - 4A is a communication satellite intended for providing high quality television, telecommunication, broadcasting services and is the first satellite to be launched in the INSAT-4 series.

Launch

INSAT 4A was launched by an Ariane 5, produced by Arianespace, on 22 Dec 2005 at 4.22 am IST from Kourou, French Guyana. It was placed into a Geosynchronous Transfer Orbit (GTO), 30 minutes after lift-off in 3-axis stabilized mode, with a perigee of 859 km and an apogee of 36,055 km. Its co-passenger on board was Meteosat-9 of EUMETSAT.

Payload

12 K_u band transponders
12 C-band transponders

References

^[1] ^[2]

INSAT satellites

INSAT-1 Series	INSAT-1A INSAT-1B INSAT-1C INSAT-1D

INSAT-2 Series	INSAT-2A INSAT-2B INSAT-2C INSAT-2D INSAT-2DT INSAT-2E

INSAT-3 Series	INSAT-3A INSAT-3B INSAT-3C INSAT-3D INSAT-3E

INSAT-4 Series	INSAT-4A INSAT-4B INSAT-4C INSAT-4CR INSAT-4E INSAT-4F INSAT-4G

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Payloads are separated by bullets ( · ), launches by pipes ( \| ). Manned flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in brackets.

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