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On June 1, 2011, National Weather Service officials upgraded the tornado's preliminary EF4 rating to EF5 based on a combination of the damage to the Cactus 117 drilling rig site, the complete destruction of other buildings in the rig's vicinity, tossed vehicles, and the mobile Doppler radar data. [11]: 7
Mounted on the top of the vehicle was a Thomson-CSF pulse Doppler radar with fixed-echo suppression which rotated at 60 rpm and had a maximum detection range of 18.5 km against low-level targets with speeds of between 35 and 440 m/s and altitude limits between zero and 4,500 m. The system also had an IFF interrogator-decoder.
It was not a true Doppler radar but used the less effective "envelope detection" technique common to Western radars of the 1960s. [4] The technology was reportedly taken from the F-4J AN/AWG-10 radars captured in Vietnam in 1967. [2] The Sapfir-23D had a detection range of approximately 45km against a high-flying, fighter-sized target. [4]
Once the radar can "look down", it is subsequently desirable to "shoot down". Various weapons systems (including guns and missiles) are then employed against designated radar targets, either relying on the aircraft's radar employing the "look down" capability (as in semi-active radar homing) or the weapon's own active radar to resolve the indicated target (as in active radar homing).
The second of five storms that will slam the eastern half of the United States with snow and ice over a two week period is on the way – and this one has more snow than the first.
NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transportation, and the U.S. Air Force within the ...
The JL-10A airborne radar is a highly digitized pulse-Doppler radar with slotted planar array developed for the People's Liberation Army Air Force (PLAAF) as a replacement for the older Type 232H radar currently employed by the Chinese air force. The radar is built to MIL-STD-1553 standard so
AN/APG-65 radar installed in an F/A-18 Hornet. The APG-65 was developed in the late 1970s and has been operational since 1983. The radar includes a velocity search (to provide maximum detection range capability against nose aspect targets), range-while-search (to detect all-aspect targets), track-while-scan (which, when combined with an autonomous missile such as AIM-120, gives the aircraft a ...