GISAT-1: ISRO’S EARTH OBSERVATION SATELLITE

ALL ABOUT ISRO’S GISAT-1

Context: Indian Space Research Organisation (ISRO) is preparing to launch GISAT-1, a new earth observation satellite, in the first week of March.

ISRO'S GISAT-1

WHAT IS GISAT? 

GEO Imaging Satellite or GISAT is a planned Indian geo-imaging satellite class for providing images quickly during disasters. Two identical satellites will provide resolution in the range of 50 m to 1.5 km.

It will carry multi-spectral (visible, near infra-red and thermal), multi-resolution (50 m to 1.5 km) imaging instruments.

WHAT ARE ITS ABILITIES? 

GISATs will feature 5 different types of multi-spectral cameras and provide near real time pictures of large areas of the country, under cloud free conditions, at frequent intervals which is, selected field image in every 5 minutes and entire Indian landmass image every 30 minutes at 50 m spatial resolution.

WHAT IS THE LAUNCH SCHEDULE?

According to an official release, GISAT-1 is planned to be launched on 5th March 2020 aboard GSLV MKII rocket.

DESIGN LIFE: 7 years

TYPE: Earth Observation Satellite (EO) 

  • An Earth Observation Satellite is one which is used or designed for Earth observation from orbit, similar to spy satellites but intended for non-military uses such as environmental monitoring, meteorology, map making etc.

REGIME: Geostationary 

  • A geostationary orbit, also referred to as a geosynchronous equatorial orbit (GEO), is a circular geosynchronous orbit 35,786 kilometres (22,236 miles) above Earth’s equator and following the direction of Earth’s rotation. 
  • Communications satellites are often placed in a geostationary orbit so that Earth-based satellite antennas (located on Earth) do not have to rotate to track them, but can be pointed permanently at the position in the sky where the satellites are located.
  • These are launched via a temporary orbit, and placed in a slot above a particular point on the Earth’s surface. 

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