Principle: Based on detecting and measuring electromagnetic radiation (reflected or emitted) from the Earth's surface. Different objects reflect/emit radiation differently, allowing for their identification and characterization.

Components: Involves sensors (devices collecting radiation), platforms (vehicles like satellites, aircraft, drones carrying sensors), data acquisition, and subsequent data processing and analysis.

Types of Sensors: Passive sensors (detect natural radiation, e.g., optical cameras, thermal infrared scanners like MODIS, VIIRS) and Active sensors (emit their own radiation and detect the reflected signal, e.g., RADAR, LiDAR).

Applications in Environment: Forest cover mapping, disaster management (floods, droughts, wildfires, cyclones), pollution monitoring, climate change studies, glacier monitoring, land degradation assessment.

Applications in Agriculture: Crop yield estimation, soil moisture mapping, pest and disease detection, precision agriculture, drought monitoring, land use/land cover mapping.

Other Applications: Urban planning, resource management (water, minerals), oceanography, defense and security, infrastructure development.

Key Satellite Programs: NASA's MODIS (Moderate Resolution Imaging Spectroradiometer) and VIIRS (Visible Infrared Imaging Radiometer Suite) are prominent for fire detection. ISRO's IRS series (e.g., Cartosat, Resourcesat) contribute significantly to India's remote sensing capabilities.

Data Interpretation: Requires sophisticated algorithms and ground-truthing to accurately interpret satellite data and differentiate between various phenomena (e.g., different types of fires).

Principle: Based on detecting and measuring electromagnetic radiation (reflected or emitted) from the Earth's surface. Different objects reflect/emit radiation differently, allowing for their identification and characterization.

Components: Involves sensors (devices collecting radiation), platforms (vehicles like satellites, aircraft, drones carrying sensors), data acquisition, and subsequent data processing and analysis.

Types of Sensors: Passive sensors (detect natural radiation, e.g., optical cameras, thermal infrared scanners like MODIS, VIIRS) and Active sensors (emit their own radiation and detect the reflected signal, e.g., RADAR, LiDAR).

Applications in Environment: Forest cover mapping, disaster management (floods, droughts, wildfires, cyclones), pollution monitoring, climate change studies, glacier monitoring, land degradation assessment.

Applications in Agriculture: Crop yield estimation, soil moisture mapping, pest and disease detection, precision agriculture, drought monitoring, land use/land cover mapping.

Other Applications: Urban planning, resource management (water, minerals), oceanography, defense and security, infrastructure development.

Key Satellite Programs: NASA's MODIS (Moderate Resolution Imaging Spectroradiometer) and VIIRS (Visible Infrared Imaging Radiometer Suite) are prominent for fire detection. ISRO's IRS series (e.g., Cartosat, Resourcesat) contribute significantly to India's remote sensing capabilities.

Data Interpretation: Requires sophisticated algorithms and ground-truthing to accurately interpret satellite data and differentiate between various phenomena (e.g., different types of fires).