Which of the following correctly describes the NISAR mission?
Joint ISRO–NASA mission using L and S-band radar
NISAR is an acronym for NASA-ISRO Synthetic Aperture Radar, which by name itself signals that it is a collaborative Earth-observation satellite built jointly by the American and Indian space agencies rather than a single-agency programme.
Its defining technical feature is that it is the first satellite to carry two radar frequencies together on one platform: NASA contributes the longer-wavelength L-band radar while ISRO contributes the S-band radar, both mounted on a large deployable mesh reflector antenna.
Because it uses microwave radar rather than optical or ultraviolet sensors, NISAR can image the surface both day and night and can see through cloud cover, smoke and light rain, which optical instruments cannot do.
This rules out the option describing it as an optical imaging mission for exoplanet detection and the one calling it a NASA-only ultraviolet astronomy mission, since neither matches its radar design or its two-agency partnership.
It also cannot be an ISRO-only X-band radar mission, because ISRO does not fly it alone and the two bands used are L and S, not X.
Its scientific goal is to map fine changes in Earth's land and ice surfaces over time, tracking crustal deformation from earthquakes and landslides, glacier and ice-sheet motion, groundwater and vegetation, by repeat radar passes.
Therefore the description that fits every fact is a Joint ISRO–NASA mission using L and S-band radar.
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Which of the following correctly describes the NISAR mission?
Read the below statements:
1. NASA launched a space telescope, SPHEREx, to study the universe's 'cosmic glow'.
2. The Major Atmospheric Cherenkov Experiment (MACE) telescope was inaugurated at Hanle, Ladakh.
Which of the above statements is/are correct?
Read the below statements:
1. NASA launched a space telescope, SPHEREx, to study the universe's "cosmic glow".
2. The Major Atmospheric Cherenkov Experiment (MACE) telescope was inaugurated at Hanle, Ladakh.
Which of the above statements is/are correct?
Important Questions from Science and Technology
Which of the following is India's first privately developed rocket launched by ISRO recently?
As of January 2020, which of the following countries had NOT independently launched a human into space?
In April 2019, scientists in ________ produced the world’s first 3D printed heart using human tissue.
In January 2020, China tested the world’s first high-speed driverless bullet train between Beijing and ________.
ISRO’s Polar Satellite Launch Vehicle (PSLV) successfully launched a remote sensing satellite of which country on 28th February 2021?
