রাডারে কোন তড়িৎ চৌম্বক ব্যবহৃত হয়?

- Radar technology is considered an active remote sensing system because it actively sends a microwave pulse and senses the energy reflected back. 
- Doppler Radar, Scatterometers, and Radar Altimeters are examples of active remote sensing instruments that use microwave frequencies.
 
Source: Nasa Website