Question

Advanced Space borne Thermal Emission and Reflection Radiometer (ASTER) is a high resolution remote sensing instrument associated with which of the following satellite:

• A. Terra
• B. Landsat
• C. SPOT
• D. Sentinel

Answer 1

Answer:

A. Terra

• The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) is a high-resolution remote sensing instrument onboard NASA's Terra satellite, launched in 1999.

ASTER provides high-resolution imagery of the Earth's surface in 14 spectral bands, including:

• Visible and near-infrared (VNIR)

• Short-wave infrared (SWIR)

• Thermal infrared (TIR)

ASTER's key features:

• Spatial resolution: 15-90 meters (depending on the band)

• Swath width: 60 km

• Revisit time: 16 days

Applications:

• Land surface temperature mapping

• Mineral identification

• Vegetation monitoring

• Soil moisture estimation

• Disaster monitoring (e.g., wildfires, floods)