Kenneth Kumar MohantyAugust 11, 2021 11:09:15 AM IST
Indian space scientists plan to add a second feather to their caps when the country’s first high-tech agile Earth Observation Satellite (EOS) is released 12. August. This “eye for an eye” sky allows real-time monitoring of the entire continent and helps in everything from agriculture to defense.
What is GISAT-1?
Developed by the Indian Space Research Organization (ISRO), GISAT is an imaging satellite launched via an indigenous Geosynchronous Satellite Launch Vehicle-F10 (GSLV-F10) from the Satish Dhawan Space Center in Sriharikata, Andhra Pradesh. The preliminary take-off is 12 August 2021 at 5.43, weather permitting.
The satellite weighs more than 2 tons, and for the first time ISRO uses Ogive-shaped shield — basically a classic bullet-shaped sharp curved surface shell — to accommodate a higher payload.
The GSLV-F10 places the satellite in a geosynchronous orbit, after which it ascends its geostationary orbit to an altitude of approximately 36,000 km above the ground using its traction device.
What are the advantages of a geostationary satellite?
Geostationary means that the satellite is located above the equator and always appears to be fixed in one place in the sky. But such satellites are not stationary. All that happens is that the high orbit in which they are placed “makes the satellite orbit at the same speed as the Earth’s spin.” Because its motion is synchronized with the rotation of the earth, the GISAT-1 orbits the earth every 24 hours.
Such satellites help terrestrial receiving stations in that they can be pointed to a fixed location in the sky and do not need to be constantly readjusted — as would be the case with low-earth satellites that need to be tracked in the sky.
ISRO says India now has “one of the largest astronomical satellite constellations” for Earth observation, and the data from these satellites is used “for a variety of applications covering agricultural, water, urban planning, rural development, mineral exploration, environment, forestry, ocean and resource management” resources. “.
How does GISAT-1 help?
According to reports, the advanced imaging satellite has been described as a “game changer” in India with its high-resolution cameras that allow continuous and real-time tracking from Indian lands and oceans. is a defense that allows for “special attention to the country’s borders for security reasons”.
In addition, for natural disasters, satellite monitoring can ensure that precautionary measures are taken in good time to reduce their impact. In addition to the disaster warning, ISRO said the satellite also provides “spectrum signatures for agriculture, forestry, mineralogy, cloud services, snow and glaciers and the ocean” and carries multispectral and hyperspectral cameras in different bands with “improved spatial and temporal resolution”.
However, the satellite needs cloudless conditions for taking pictures. Union Minister Jitendra Singh has told Rajya Sabha that the satellite can image the entire country 4-5 times a day.
Why was it delayed in launching?
From technical disruptions to the Covid-19 pandemic, the GISAT-1 launch has suffered several delays, and is only the second ISRO launch in 2021 after the February 18 launch of a small satellite.
It was originally scheduled for release on March 5, 2020, but was canceled for technical reasons. Immediately after the pandemic and the closures it brought with it, the launch of GISAT-1 suffered a long delay. The “small problem” postponed on March 28 this year led to the postponement of the boot until April and then, with the second wave breaking until May.