1. NISAR uses dual-frequency radar to monitor Earth’s surface changes. 2. It is designed to provide data useful for studying natural hazards. 3. It relies primarily on optical imaging for high-resolution surface mapping. Which are correct for NISAR?

Which are correct in reference to NISAR? 1. Synthetic Aperture Radar (SAR) works regardless of cloud and lighting conditions. 2. SAR needs sunlight to image Earth’s surface. 3. Dual-frequency radar improves surface and vegetation differentiation.

Which are correct for NISAR mission? 1. It will operate in a near-polar orbit to enable global coverage of Earth. 2. It can be used to monitor changes in ice sheets, forests, and land deformation. 3. It is also intended for deep space exploration.

What is correct for instruments onboard Aditya-L1? 1. Some payloads observe the solar corona; others study solar wind & particles. 2. All onboard instruments operate only in the visible spectrum. 3. Mission includes remote sensing & in-situ measurements.

What is correct for Aditya-L1? 1. Aims to study solar phenomena like coronal heating & solar flares. 2. Mission data help understand space weather & its impact on Earth. 3. Designed to directly study the Sun’s internal structure using seismic techniques.

Consider for Chandrayaan-3: 1. Mission architecture excluded an orbiter component and focused on landing capabilities. 2. Propulsion module was used to carry the lander to lunar orbit and also had limited scientific payloads. Which statements are correct?

Consider for Chandrayaan-3: 1. Aimed to demonstrate safe and soft-landing technology near the lunar south polar region. 2. Rover was designed for long-term operation for multiple lunar days without dependence on solar energy. Which statements are correct?

1.Chandrayaan-1: Detection of water/hydroxyl on lunar surface. 2.Chandrayaan-2: Successful soft landing of lander near lunar south pole. 3.Chandrayaan-3: Demonstration of safe and soft-landing capability on the Moon. Which pairs are correctly matched?

1. Dispersion of FRB signals varies with the density of intervening matter. 2. Repeating FRBs necessarily originate from a different class of sources than non-repeating FRBs. 3. FRBs are extremely short-duration emissions. Which are correct?

1. Polarisation measurements of FRBs can reveal magnetic environments near their source. 2. FRBs with higher dispersion measures are always farther from Earth. 3. Multi-wavelength follow-ups may help identify FRB environments. Which are correct?

What is correct for the Hubble Space Telescope? 1. Its location above Earth’s atmosphere reduces atmospheric distortion in observations. 2. It operates primarily in low Earth orbit. 3. Its observations are limited only to the visible spectrum.

For Hubble Space Telescope, what is correct: 1. Servicing missions upgrade its instruments & extend operational life. 2. Its observations helped estimate Universe’s expansion rate. 3. Its mirror system removes the need for image processing & calibration.