Question

SAR data is suitable for assessing the:

• A. $\text{Health of crop}$
• B. $\text{Crop type}$
• C. $\text{Phenology of crop}$
• D. $\text{Moisture content of the crop}$

Hint:

SAR (Synthetic Aperture Radar) is best suited for moisture content estimation, while multispectral indices (e.g., NDVI, EVI) are used for vegetation health monitoring.

Answer 1

The Correct Option is D

Step 1: Understanding SAR data in remote sensing. - SAR (Synthetic Aperture Radar) is a radar-based remote sensing technique that provides all-weather and day/night imaging capabilities. - SAR is particularly sensitive to moisture content because microwave signals interact strongly with water.
Step 2: Explanation of incorrect options. - Health of crop a.: Requires multispectral indices like NDVI, not SAR. - Crop type b.: Determined using optical/multispectral sensors, not SAR. - Phenology of crop c.: Based on optical imagery and time-series analysis, not SAR.
Step 3: Selecting the correct option. Since SAR is primarily used for moisture content assessment, the correct answer is d. Moisture content of the crop.