ISRO To Launch INSAT-3DS

Context:

This article is based on the news “ISRO to launch INSAT-3DS on Feb 17, will improve forecasts” which was published in the Indian Express. ISRO to launch INSAT-3DS on Feb 17 to improve forecasts. It is the third in a series of INSAT-3D satellites.

Relevancy for Prelims: ISRO, New Targets For ISRO, ISRO Aditya L1 Mission, and ISRO’s Distress Alert Transmitter.

Relevancy for Mains: SPACE & SPACE TECHNOLOGY.

INSAT or the Indian National Satellite System is a series of multipurpose Geo-stationary satellites. They are launched by ISRO to satisfy the telecommunications, broadcasting, meteorology, and search and rescue needs of India. INSAT is the largest domestic communication system in the Asia Pacific Region.

It is designed for enhanced meteorological observations and monitoring of land and ocean surfaces for weather forecasting and disaster warning.
Launch Details: INSAT-3DS mission is to be launched from Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, Andhra Pradesh.

INSAT-3DS

Funding: Fully funded by the Ministry of Earth Sciences (MoES).
Collaboration: ISRO and the India Meteorological Organisation (IMD).
Launch Vehicle: Geosynchronous Launch Vehicle (GSLV-F14). The GSLV aims at deploying the INSAT-3DS into the Geosynchronous Transfer Orbit (GTO).
Augmentation: The satellite will augment the Meteorological services along with the presently operational INSAT-3D and INSAT-3DR satellites.

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Satish Dhawan Space Centre (SDSC)

Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota, the Spaceport of India, is responsible for providing Launch Base Infrastructure for the Indian Space Programme.
The Centre has two launch pads from where the rocket launching operations of PSLV and GSLV are carried out.
It has a separate launch pad for launching sounding rockets.

To monitor Earth’s surface, carry out Oceanic observations and its environment in various spectral channels of meteorological importance.
To provide the vertical profile of various meteorological parameters of the Atmosphere.
To provide the Data Collection and Data Dissemination capabilities from the Data Collection Platforms (DCPs).
To provide Satellite Aided Search and Rescue services.

Imager Payload: INSAT-3DS Satellite carries a multi-spectral Imager (optical radiometer) capable of generating images of the Earth and its environment in six wavelength bands.
Sounder Payload: Sounder will provide the information on the vertical profiles of the Atmosphere – temperature, humidity etc.
Data Relay Transponder (DRT): Receives globally Meteorological, Hydrological and Oceanographic data from automatic Data collection platforms/Automatic Weather Stations (AWS) from multi-user and relays back to the user terminal.
Satellite-aided Search and Rescue (SA&SR) Transponder: Relays a distress signal/alert detection from the beacon transmitters for Search and Rescue purposes.

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Geosynchronous Satellite Launch Vehicle (GSLV) is a three-stage launch vehicle having a liftoff mass of 420 tonnes.
GSLV can be used to launch a variety of spacecraft capable of performing communications, navigation, earth resource surveys, and any other proprietary mission.

INSAT-3DS

Transfer orbits are a special kind of orbit used by the satellites to get from one orbit to another.
GTO provides satellites a halt before they can be placed in their destination orbit.
The launchers do not have to directly place a satellite into GEO. Instead, it can first make use of GTO.

It makes satellites placed in it appear ‘Stationary’ as their orbital period is the same as the earth’s rotation period.
The GEO satellites are directly overhead at the Earth’s equator.
ISRO’s Indian National Satellite System [INSAT] is placed in GEO. This is because it is easy for the Earth antennas to track the communication satellites without rotation.

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News Source: Indian Express

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