Radar can track storm systems, because precipitation reflects electromagnetic field s at certain frequencies.
Radar can also render precise maps.
Radar systems are widely used in air-traffic control, aircraft navigation, and marine navigation. High-power radar, using large dish antennas, has been used to measure distances to the moon, other planets, asteroids, and artificial satellites. From unmanned space probes, radar has been used to map Venus, whose surface is obscured at visible wavelengths by a thick layer of clouds. The display is in polar coordinates. A rotating antenna transmits RF pulses at defined intervals.