What is the primary function of Pulse Radar in remote sensing?

The primary function of Pulse Radar in remote sensing is to measure the distance, speed, and characteristics of targets. This technology utilizes pulses of radio waves that are transmitted toward a target, and when those waves bounce back, they provide critical information about the target's location, velocity, and other physical characteristics. The time it takes for the pulse to return allows for precise distance measurements, while the frequency shift of the returned signal (Doppler effect) can be used to determine the speed of moving targets. This technical capability makes Pulse Radar especially valuable in applications such as tracking vehicles, monitoring weather patterns, and detecting objects in both terrestrial and aerial contexts.

Temperature changes and chemical compositions are typically measured using different sensors and methods. Visual images of the earth's surface are usually produced by optical or multispectral sensors, not solely by Pulse Radar. Therefore, the correct answer highlights the unique contributions of Pulse Radar in capturing dynamic information about objects rather than focusing on thermal or chemical properties or imaging techniques.