Active vs Passive Sensors in Remote Sensing: Basics, Differences & Examples

What is the difference between active and passive sensors in remote sensing? In this video, we break down how satellites and sensors collect Earth observation data and why specific technologies are chosen for different applications. Learn how passive sensors detect naturally reflected or emitted energy, while active sensors transmit their own energy to measure the return signal. We cover key concepts, advantages, limitations, and real-world examples including SAR, LiDAR, Landsat, and Sentinel-2.Topics Covered: • What are active sensors? • What are passive sensors? • Active vs passive sensors in remote sensing • Examples: SAR, LiDAR, Landsat, Sentinel-1 & Sentinel-2 • Advantages and limitations of each sensor type • Applications in agriculture, disaster management, climate monitoring, and mapping. Perfect for students preparing for GATE Geomatics, IIRS courses, GIS professionals, and remote sensing beginners. #remotesensing #gis #earthobservation #SAR #lidar #Sentinel1 #geospatial #geomatics #GATEGeomatics #IIRS #Activesensor #PassiveSensor