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2. Wave radar - Wikipedia

   en.wikipedia.org/wiki/Wave_radar

   The marine navigation radar operates in low grazing angle mode and wind generated surface ripple must be present. The marine navigation radar is non-coherent and is a typical example of an indirect wave sensor, because there is no direct relation between wave height and radar back-scatter modulation amplitude.

3. Continuous-wave radar - Wikipedia

   en.wikipedia.org/wiki/Continuous-wave_radar

   Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect , which causes the received signal to have a different frequency from the transmitted signal ...

4. Radar - Wikipedia

   en.wikipedia.org/wiki/Radar

   Radar is a system that uses radio waves to determine the distance (), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.

5. List of radars - Wikipedia

   en.wikipedia.org/wiki/List_of_radars

   AN/MPQ-35 PAR (Pulse Acquisition Radar) high/medium-altitude threat detection radar for MIM-23 Hawk surface-to-air missile system. AN/MPQ-43 mobile High Power Acquisition Radar (HIPAR) for Nike ADM. AN/MPQ-64 Sentinel; AN/MSQ-1 Close Support Control Set for Radar Bomb Scoring (RBS) AN/MSQ-1A used for Matador Automatic Radar Control

6. List of radar types - Wikipedia

   en.wikipedia.org/wiki/List_of_radar_types

   Marine radars are used by ships for collision avoidance and navigation purposes. The frequency band of radar used on most ships is X band (9 GHz/3 cm), but S band (3 GHz/10 cm) radar is also installed on most oceangoing ships to provide better detection of ships in rough sea and heavy rain condition.

7. Mmwave sensing - Wikipedia

   en.wikipedia.org/wiki/Mmwave_sensing

   Millimeter wave (mmWave) sensing is a non-contact system of using mmWave radar sensors to measure movement, acceleration, and angles as small as a fraction of a millimeter. [1] This system requires a mmWave radar sensor to transmit and receive pulses of millimeter electromagnetic wave energy, detecting targets and motion from the reflections it ...