PSLV-C51, the first dedicated launch by NSIL, successfully launches Amazonia-1 and 18 Co-passenger satellites from Sriharikota
Vikram Sarabhai Space Centre - an aerial view
Rohini Sounding Rocket (RH 200) getting ready for launch

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January 09, 2002

Israel Deputy Prime Minister Visits ISRO

Mr Shimon Peres, Deputy Prime Minister and Minister for Foreign Affairs of Israel visited the ISRO Satellite Centre at Bangalore this afternoon (January 9, 2002). Dr K Kasturirangan, Chairman, ISRO, made a brief presentation on the Indian Space programme to the visiting dignitary.

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After the briefing on the space activities, the Deputy Prime Minister of Israel was shown around the Satellite Centre and the exhibition. The Deputy Prime Minister evinced keen interest in the Indian space programme and its achievements

December 30, 2005

Indian Remote Sensing Satellite, IRS-1C, Completes Ten Years

The Indian Remote Sensing satellite, IRS-1C, which was launched on December 28, 1995, has completed ten years of operation. IRS-1C carried a unique combination of three state-of-the-art cameras - a Panchromatic Camera with a spatial resolution of 5.8 metre, a Linear Imaging Self Scanner-3 with a resolution of 23 metre and a Wide Field Sensor with a resolution of 188 metre. When it was launched, IRS-1C was the most advanced civilian remote sensing satellite. This satellite was launched into a polar sun-synchronous orbit of 817 km by the Russian Molniya Launch Vehicle.

Even though designed life of IRS-1C was three years, the meticulous in-orbit operations of the satellite by the ISRO Telemetry, Tracking and Command Network (ISTRAC) coupled with the highly efficient use of the on-board propellant for its orbit and orientation control as well as the high reliability built into its subsystems have enabled IRS-1C to far outlive its designed life. The success of IRS-1C paved the way for India to enter into the global remote sensing market and to capture a substantial share for remote sensing data market. More than US $ 10 million in revenue by data sale from IRS-1C has accrued so far.

IRS-1C data provided a great fillip to remote sensing applications in India like crop acreage and yield estimation, forest resources survey, urban mapping, flood mapping, wasteland mapping and drought monitoring and assessment. IRS-1C was followed by an identical satellite IRS-1D, which was launched by India's own Polar Satellite Launch Vehicle, PSLV, on September 29, 1997. This, in turn, paved the way for the launch of more theme-oriented remote sensing satellites like OCEANSAT-1, RESOURCESAT-1 and CARTOSAT-1.

In the past one decade, IRS-1C has orbited the earth nearly sixty thousand times and sent lakhs of imageries.

December 24, 2005

INSAT-4A Orbit Raised Further

home big 03INSAT-4A was launched by European Ariane-5 launch vehicle on December 22, 2005 from Kourou, French Guyana. The launch vehicle had placed INSAT-4A in an orbit with a perigee (closes point to the earth) of 622 km and apogee (farthest point to earth) of 36,152 km. The first orbit raising manoeuvre carried out from MCF, Hassan yesterday (December 23, 2005) had put the satellite in an intermediate orbit of 13733 km perigee and 36,008 km apogee.

In the second orbit raising manoeuvre conducted at 13.24 (IST) today (December 24, 2005), the Liquid Apogee Motor (LAM) on board INSAT-4A was fired for 42 minutes by commanding the satellite from Master Control Facility (MCF), Hassan. With this LAM firing, INSAT-4A perigee (closest point to the earth) has been raised to 31479 km. The apogee height remains at 36,008 km and the inclination of the orbit with respect to the equatorial plane has been reduced from 0.85 deg to the present 0.12 deg. INSAT-4A now has an orbital period of 22 hours 13 minutes. The satellite will now be in the continuous radio visibility of MCF-Hassan.

The satellite came within the radio visibility of MCF this morning at 07.19 am (IST) and all the necessary operations like earth acquisition and gyro calibration were carried out before the second orbit raising manoeuvre was started.

The next orbit manoeuvre to place INSAT-4A in near Geosynchronous Orbit is planned on December 26, 2005. Deployment of the two solar panels and the two antennas will be carried out subsequently.

December 24, 2005

INSAT-4A Orbit Raised Further

home big 03INSAT-4A was launched by European Ariane-5 launch vehicle on December 22, 2005 from Kourou, French Guyana. The launch vehicle had placed INSAT-4A in an orbit with a perigee (closes point to the earth) of 622 km and apogee (farthest point to earth) of 36,152 km. The first orbit raising manoeuvre carried out from MCF, Hassan yesterday (December 23, 2005) had put the satellite in an intermediate orbit of 13733 km perigee and 36,008 km apogee.

In the second orbit raising manoeuvre conducted at 13.24 (IST) today (December 24, 2005), the Liquid Apogee Motor (LAM) on board INSAT-4A was fired for 42 minutes by commanding the satellite from Master Control Facility (MCF), Hassan. With this LAM firing, INSAT-4A perigee (closest point to the earth) has been raised to 31479 km. The apogee height remains at 36,008 km and the inclination of the orbit with respect to the equatorial plane has been reduced from 0.85 deg to the present 0.12 deg. INSAT-4A now has an orbital period of 22 hours 13 minutes. The satellite will now be in the continuous radio visibility of MCF-Hassan.

The satellite came within the radio visibility of MCF this morning at 07.19 am (IST) and all the necessary operations like earth acquisition and gyro calibration were carried out before the second orbit raising manoeuvre was started.

The next orbit manoeuvre to place INSAT-4A in near Geosynchronous Orbit is planned on December 26, 2005. Deployment of the two solar panels and the two antennas will be carried out subsequently.

September 28, 2003

INSAT-3E Launched successfully

ISRO's latest communication satellite, INSAT-3E, was successfully launched early this morning (September 28, 2003) by the Ariane-5 launch vehicle of Arianespace. INSAT-3E is the fourth satellite in the INSAT-3 series. INSAT-3A, INSAT-3B and INSAT-3C were launched on April 10, 2003, March 22, 2000 and January 24, 2002 respectively.

The 162nd flight of Ariane (Ariane-5), with ISRO's 2775 kg INSAT-3E, e-BIRD of EUTELSAT and SMART-1 of European Space Agency, lifted off at 4.44 am IST from Kourou, French Guyana. INSAT-3E was injected into a Geosynchronous Transfer Orbit (GTO), at 5.14 am, i.e., 30 minutes after the lift-off, in 3-axis stabilised mode, with a perigee (nearest point to earth) of 649 km and an apogee (farthest point to earth) of 35,923 km and an inclination of 7 deg. with respect to the equator. The satellite is at present orbiting the earth with an orbital period of about 10 hours 50 minutes.

The Master Control Facility (MCF) at Hassan in Karnataka acquired the first signals from INSAT-3E at 05.14 am IST. The initial health checks on the satellite indicate that the satellite's performance is normal. MCF subsequently issued tele-commands to the satellite to make the satellite's earth viewing face orient towards earth. The calibration of the gyros on board the satellite was also carried out.

INSAT-3E is being tracked, monitored and controlled from MCF. During the initial phase of INSAT-3E operations, MCF also utilises INMARSAT Organisation's Telemetry, Tracking and Command (TTC) ground stations at Beijing (China), Fucino (Italy) and Lake Cowichan (Canada). The satellite's orbit is being precisely determined by continuous ranging from the participating ground stations.  

In the coming days, INSAT-3E will be raised to its final geostationary orbit, which is about 36,000 km above the equator, by firing its 440 Newton Liquid Apogee Motor (LAM). When the satellite reaches near geosynchronous orbit, deployment of its solar panels and the two antennas will be carried out and the satellite put in its final 3-axis stabilised mode. This will be followed by trim manoeuvres to take the satellite to its designated orbital slot. The payloads will be subsequently checked out before the commissioning of the satellite.

INSAT-3E will be positioned at 55 deg East longitude in the geosynchronous orbit. Other INSAT satellite locations are: INSAT-3A at 93.5 deg East longitude, INSAT-2E and INSAT-3B at 83 deg East longitude, INSAT-3C and KALPANA-1 at 74 deg East longitude and GSAT-2 at 48 deg East longitude.

INSAT-3E Communication Payloads comprise 

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24 C-band transponders, having India beam coverage providing an Edge Of Coverage-Effective Isotropic Radiated Power (EOC-EIRP) of 38.5 dBW.

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12 upper extended C-band transponders having India beam coverage providing an EOC-EIRP of 38 dBW

INSAT-3E, with a lift off weight of 2,775 kg, has its main body in the shape of a cuboid of dimensions 2.0 m x 1.77 m x 2.8 m with solar arrays on north and south sides. When its solar panels are fully deployed in orbit, the satellite will measure 15.44 m (North-South).

The spacecraft propulsion system to take the satellite from GTO to its final geosynchronous orbit employs a 440 N Liquid Apogee Motor with 1594 kg of MON-3 (Mixed Oxides of Nitrogen) and MMH (Mono Methyl Hydrazine). The satellite will be 3-axis body stabilised in orbit using sensors, momentum and reaction wheels, magnetic torquers and eight 10 Newton and eight 22 Newton Reaction Control Thrusters. The satellite has two solar arrays together generating 2,400 Watt of electrical power backed up by two 70 Ah Nickel Hydrogen Batteries that support full payload operation during eclipse period.

The satellite has two deployable antennas and one fixed antenna for various transmit and receive functions.

With ISRO Satellite Centre (ISAC), Bangalore, as the lead Centre, INSAT-3E was realised with major contributions from Space Applications Centre (SAC), Ahmedabad, Liquid Propulsion Systems Centre (LPSC) at Valiamala and Bangalore, Vikram Sarabhai Space Centre (VSSC) and ISRO Inertial Systems Unit (IISU), Thiruvananthapuram. Besides, several industries in both public and private sectors have contributed to the realisation of INSAT-3E. MCF is responsible for initial phase and in-orbit operation of all geostationary satellites of ISRO.

 Earlier INSAT satellites  

Satellite

Launch Date

Launch Vehicle

Remarks

INSAT-1A

Apr 10, 1982

Delta 3920

Failed

INSAT-1B

Aug 30, 1983

Space Shuttle

Service completed as planned

INSAT-1C

Jul 22, 1988

Ariane-3

Premature termination of service after 6 months of operation

INSAT-1D

Jun 12, 1990

Delta 2

Service completed as planned

INSAT-2A

July 10, 1992

Ariane 4

Service completed as planned

INSAT-2B

July 23, 1993

Ariane 4

Service completed as planned

INSAT-2C

Dec 7, 1995

Ariane 4

Service completed as planned

INSAT-2D

Jun 4, 1997

Ariane 4

Premature termination of services after 3 months of operation

INSAT-2DT

In-orbit procurement from Arabsat

Service completed as planned

INSAT-2E

Apr 3, 1999

Ariane 4

Operational

INSAT-3A

April 10, 2003

Ariane 5

Operational

INSAT-3B

Mar 22, 2000

Ariane 5

Operational

INSAT-3C

Jan 24, 2002

Ariane 4

Operational

KALPANA-1

Sep 12, 2002

PSLV

Operational

GSAT-2

May 8, 2003

GSLV

In Service

 

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