Statements (337)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:building
gptkb:radar gptkb:radio_station gptkb:technology instrumental detection system radio navigation system Telecommunications infrastructure Radar technology |
| gptkbp:abbreviation |
gptkb:Radio_Detection_and_Ranging
SAR |
| gptkbp:accuracy |
0.25 nautical miles
|
| gptkbp:advantage |
high cost
flexibility complexity high reliability thermal management fast scanning All-weather imaging Day and night operation |
| gptkbp:alternativeName |
radar_system
LORAN-C_chain Over-the-horizon_radar Radar_Instrument Radar_station Radar_system Satellite_ground_station Synthetic_Aperture_Radar active_electronically_scanned_array_radar air_search_radar airborne_radar fire-control_radar fire_control_radar ground_station marine_radar military_radar military_radar_system naval_radar naval_radar_system phased_array_radar radar_altimeter radar_instrument radar_network radar_station radar_technology radar_warning_receiver radio_navigation_service radiometer rangefinder ranger_station surface_search_radar synthetic_aperture_radar weather_radar weather_radar_network |
| gptkbp:application |
gptkb:radar
air traffic control |
| gptkbp:basedOn |
LORAN-C technology
|
| gptkbp:canBe |
Airborne
Ground-based Spaceborne |
| gptkbp:canBeInterferometric |
true
|
| gptkbp:canBePolarimetric |
true
|
| gptkbp:canBeRepeatPass |
true
|
| gptkbp:canBeSinglePass |
true
|
| gptkbp:canOperateAtNight |
true
|
| gptkbp:canPenetrateClouds |
true
|
| gptkbp:category |
gptkb:aeronautical_radionavigation_service
gptkb:land_radionavigation_service gptkb:maritime_radionavigation_service |
| gptkbp:chainID |
unique identifier for each chain
|
| gptkbp:communicatesVia |
gptkb:Weather_satellites
Earth observation satellites Communication satellites Navigation satellites |
| gptkbp:component |
gptkb:aircraft
gptkb:battery air defense systems weather stations automotive safety systems maritime navigation systems space exploration systems Ships signal processor Weather stations antenna element control computer phase shifter transmit/receive module Satellite communication system |
| gptkbp:consistsOf |
master station
secondary stations |
| gptkbp:countryOfOrigin |
gptkb:Australia
gptkb:China gptkb:Soviet_Union gptkb:United_Kingdom gptkb:United_States |
| gptkbp:decommissioned |
2010 (US)
|
| gptkbp:definedIn |
gptkb:International_Telecommunication_Union
|
| gptkbp:detects |
gptkb:Terrain
gptkb:aircraft gptkb:satellite missiles vehicles Birds ships precipitation Weather phenomena Missiles terrain weather formations Vehicles Ships Obstacles |
| gptkbp:developedBy |
1950s
|
| gptkbp:enables |
gptkb:Air_traffic_control
Maritime navigation timing Weather forecasting low probability of intercept tracking of multiple targets electronic counter-countermeasures position determination Satellite tracking 3D radar capability adaptive beamforming simultaneous multi-beam operation tracking of fast-moving targets Change detection Interferometry Surface deformation measurement Military surveillance Data downlink Data uplink Satellite command Satellite telemetry velocity determination Speed enforcement |
| gptkbp:example |
gptkb:GPS
gptkb:DME gptkb:SAMPSON_radar gptkb:Inmarsat_ground_station gptkb:Iridium_gateway gptkb:APAR gptkb:NOAA_Satellite_Operations_Facility gptkb:AN/SPY-1 gptkb:NASA_Deep_Space_Network gptkb:VOR gptkb:ESA_ESTRACK gptkb:NEXRAD_(phased_array_prototype) gptkb:LORAN |
| gptkbp:feature |
no moving parts
high reliability multiple target tracking electronic beam steering rapid beam steering |
| gptkbp:frequency |
gptkb:L-band
gptkb:C-band gptkb:Ka-band gptkb:S-band 100 kHz X-band |
| gptkbp:function |
Communicate with satellites
|
| gptkbp:hasType |
gptkb:radar
gptkb:bistatic_radar gptkb:continuous-wave_radar gptkb:monostatic_radar gptkb:pulse_radar Doppler radar ground-penetrating radar automotive radar civilian radar over-the-horizon radar spaceborne radar |
| https://www.w3.org/2000/01/rdf-schema#label |
radar
|
| gptkbp:introducedIn |
1930s
1957 |
| gptkbp:inventedBy |
gptkb:Sir_Robert_Watson-Watt
gptkb:Carl_Wiley 1930s |
| gptkbp:ITU_Radio_Regulations_Article |
Article 1.42
|
| gptkbp:limitation |
affected by weather conditions
limited by line of sight subject to electronic countermeasures Affected by ionospheric conditions Lower resolution than line-of-sight radar |
| gptkbp:location |
Earth's surface
|
| gptkbp:mayInclude |
Backup power supply
Climate control systems |
| gptkbp:measures |
Range
velocity Angle range Velocity |
| gptkbp:notableExample |
gptkb:Duga_radar
gptkb:Relocatable_Over-the-horizon_Radar_(ROTHR) gptkb:Jindalee_Operational_Radar_Network |
| gptkbp:notableMission |
gptkb:RADARSAT
gptkb:Sentinel-1 gptkb:ALOS gptkb:TerraSAR-X gptkb:RISAT gptkb:SIR-A gptkb:SIR-B gptkb:SIR-C |
| gptkbp:operatedBy |
gptkb:United_States_Coast_Guard
Telecommunications companies Research institutions Military organizations Space agencies various international agencies |
| gptkbp:operates |
gptkb:Radio_waves
gptkb:C_band gptkb:Ka_band gptkb:Ku_band gptkb:L_band analyzing reflected signals emitting radio waves S band X band Bouncing radio waves off the ionosphere |
| gptkbp:operatesIn |
radio frequency spectrum
Microwave spectrum |
| gptkbp:period |
precise time intervals between stations
|
| gptkbp:principle |
Uses motion of radar antenna to simulate large antenna aperture
|
| gptkbp:produces |
High-resolution images
|
| gptkbp:purpose |
gptkb:navigation
|
| gptkbp:range |
Thousands of kilometers
|
| gptkbp:relatedConcept |
gptkb:Line-of-sight_radar
gptkb:Ionosphere Radar cross-section |
| gptkbp:relatedTo |
gptkb:satellite
gptkb:Downlink gptkb:sonar gptkb:Uplink gptkb:Lidar gptkb:Inverse_Synthetic_Aperture_Radar gptkb:Real_Aperture_Radar radio astronomy Mission lidar infrared sensors Remote sensing Sonar VSAT Antenna array Radio frequency interference Satellite dish Satellite internet Ground segment Space segment Telemetry, tracking, and command (TT&C) |
| gptkbp:replacedBy |
gptkb:LORAN-A
gptkb:eLORAN gptkb:GPS |
| gptkbp:requires |
Receiver
Antenna Transmitter Signal processor Line of sight to satellite |
| gptkbp:resolution |
Can achieve meter to sub-meter resolution
|
| gptkbp:servesArea |
regional
|
| gptkbp:status |
mostly decommissioned
|
| gptkbp:subspecies |
gptkb:Synthetic_aperture_radar
Doppler radar Phased array radar Continuous-wave radar Pulse radar |
| gptkbp:technology |
active electronically scanned array
conventional radar passive electronically scanned array |
| gptkbp:type |
gptkb:Skywave_radar
gptkb:Surface_wave_radar gptkb:Amplitude active sensor remote sensing technology Phase Active sensor pulsed low-frequency radio signals Remote sensing device |
| gptkbp:used_in |
gptkb:military
airports meteorological agencies |
| gptkbp:usedBy |
gptkb:NASA
gptkb:ESA gptkb:ISRO Military maritime navigation Military organizations aviation navigation Civilian agencies |
| gptkbp:usedFor |
gptkb:navigation
Surveillance air traffic control military applications Earth observation weather monitoring Oceanography Remote sensing detecting objects measuring distance measuring speed Disaster monitoring Ice monitoring Military reconnaissance long-range navigation Measuring distance Vegetation analysis Mapping terrain Early warning Long-range detection Measuring speed Detecting objects |
| gptkbp:usedIn |
gptkb:Asia
gptkb:Europe gptkb:North_America Aviation Meteorology Military Navigation |
| gptkbp:usedOn |
gptkb:aircraft
Drones Satellites |
| gptkbp:uses |
gptkb:radio_waves
gptkb:Doppler_effect microwaves phased array antenna Control system Parabolic antenna Antenna motion Coherent processing Pulse compression Radio receiver Radio transmitter Tracking system |
| gptkbp:bfsParent |
gptkb:Fat_Man_bomb
gptkb:World_War_II |
| gptkbp:bfsLayer |
3
|