FORESTRY
REMOTE SENSING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Landsat 7
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Landsat 8
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Aster
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Terrasar X
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Detailed explanation-1: -TerraSAR-X and TanDEM-X are commercial German Synthetic Aperture Radar (SAR) Earth observation satellites, which were launched in June 2007 and June 2010 respectively. Both satellites feature a scheduled lifetime of 5 years.
Detailed explanation-2: -Earth-observing radar satellites include: RISAT-1 (SAR, ISRO India, 2012) RORSAT (SAR, Soviet Union, 1967-1988) Seasat (SAR, altimeter, scatterometer, US, 1978)
Detailed explanation-3: -Satellite and mission TerraSAR-X is designed to carry out its task for five years, independent of weather conditions and illumination, and provides radar images with a resolution of up to 1m.
Detailed explanation-4: -Three types of orbits are typically used in remote sensing satellites, such as geostationary, equatorial, and sun-synchronous orbits. A geostationary satellite has a period of rotation equal to that of Earth (24 hours) so the satellite always stays over the same location on Earth.