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RISAT-2B, the country’s newest microwave Earth observation satellite, rode to its orbit 557 km above the ground.
With the successful pre-dawn launch of RISAT-2B satellite, the Indian Space Research Organisation (ISRO) has added another feather to its cap.
Data that will come from the all-weather day-and-night satellite are considered to be vital for the Armed Forces as also agriculture forecasters and disaster relief agencies.
Dubbed as a ‘spy’ satellite, RISAT-2B (Radar Imaging Satellite-2B) will replace its predecessor RISAT-2 which has been actively used by India to monitor activities in terror camps across the border in Pakistan to thwart infiltration bids by terrorists.
Radar imaging satellite RISAT-2B:
RISAT-2B will use Microwave radiation:
RISAT-2B Equipped with SAR (Synthetic Aperture Radar):
A Synthetic Aperture Radar (SAR) or SAR, is a coherent mostly airborne or spaceborne side looking radar system which utilizes the flight path of the platform to simulate an extremely large antenna, and thatgenerates high-resolution remote sensing imagery.
Over time, individual transmit/receive cycles (PRT’s) are completed with the data from each cycle being stored electronically.
The signal processing uses magnitude and phase of the received signals over successive pulses from elements of a synthetic aperture.
After a given number of cycles, the stored data is recombined to create a high-resolution image of the terrain being over flown.
Countries using Radar Imaging Satellites:
India is not the only country to use radar imaging for military reconnaissance – other systems currently in operation include the United States’ TOPAZ constellation, Japan’s IGS Radar and Italy’s COSMO-SkyMed.
SAR has also been used on civilian scientific and commercial satellites and on interplanetary probes.
India’s partnership with Israel on this satellite boosted its radar imaging technology, and provided an initial capability ahead of the launch of India’s indigenously-developed RISAT-1. Newer satellites, including RISAT-2B, have been developed by ISRO.
The information will complement data from the normal optical remote-sensing satellites. Such data are useful for agencies that need ground imageries during cloud, rain and in the dark.
Conclusion:
The satellite will enhance India’s capability in crop monitoring during the monsoon season, forestry mapping for forest fires and deforestation, and flood mapping as part of the national disaster management programme.
Given that overcast skies are a constant during the monsoon season and during times of flood, the ability to penetrate the cloud cover is essential.
The biggest advantage is that ground imageries can be collected during rains and despite dust, clouds or darkness and during all seasons, thus ensuring continuous and reliable data.
ISRO is now gearing up for the launch of Chandrayaan-2 onboard GSLV MkIII during the window of July 2019, with an expected Moon landing on September 2019.
By: Priyank Kishore ProfileResourcesReport error
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