India to get advanced ‘eye in the sky’ ahead of I-Day with Gisat-1 launch on Aug 12 | India News - Times of India

India to get advanced ‘eye in the sky’ ahead of I-Day with Gisat-1 launch on Aug 12 | India News – Times of India

NEW DELHI: Just three days ahead of the Independence Day, India will finally launch its most advanced geo-imaging satellite (Gisat-1), which will allow better monitoring of the subcontinent, including its borders with Pakistan and China, by imaging the country 4-5 times a day. The satellite will be launched on August 12 at 5.43am from Sriharikota.
The pandemic delayed the launch of the new-series geo-satellite, which has civilian and strategic importance, several times since last year. Isro’s GSLV-F10 rocket will finally put the 2,268-kg Gisat-1, codenamed EOS-3, into the geo-orbit. This will be India’s first launch of a primary satellite this year. On February 28, Isro had launched 18 small satellites, including some desi satellites, along with primary satellite Amazonia-1 of Brazil.
Once placed 36,000 km above earth in the geostationary orbit after space manoeuvres, the advanced ‘eye in the sky’ can constantly monitor areas of interest (the satellite will move in sync with the rotation of the Earth and hence would look stationary) and will give real-time information about a large area unlike other remote sensing satellites placed in lower orbits that come to a spot only at regular intervals. EOS-3 will also enable quick monitoring of natural disasters, episodic and short-term events.
Minister of state for department of space Jitendra Singh, in a response to a question in Rajya Sabha recently, had said that EOS-03 is capable of imaging the whole country 4-5 times daily. The satellite, which is capable of near real-time monitoring of floods and cyclones, will also enable monitoring of water bodies, crops, vegetation conditions and forest cover changes, he said.
The satellite will have payload imaging sensors of six-band multispectral visible and near infra-red with 42-metre resolution, 158 bands hyper-spectral visible and near infra-red with 318-metre resolution and 256 bands hyper-spectral short wave infra-red with 191-metre resolution. A 4-metre diameter ogive-shaped payload fairing (heat shield) has been used in the rocket for the first time, an Isro statement said.
The satellite was earlier scheduled for launch on March 28 this year but a “minor issue” forced its postponement. The launch was later expected in April and then in May but Covid-triggered restrictions in states where Isro centres are located delayed it again.
After the Gisat-1 launch, the other satellite to go up will be EOS-4 or Risat-1A, which is a radar imaging satellite with synthetic aperture radar (SAR) that can take pictures during day and night and can also see through clouds. The satellite weighing over 1,800 kg will be launched by a PSLV in September. The satellite will play a strategic role in the country’s defence with its capability to operate in day, night and all weather conditions.
The first developmental flight of the Small Satellite Launch Vehicle (SSLV) or mini-PSLV is also scheduled for the fourth quarter of this year from Sriharikota.

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