* Radar astronomy

Radar astronomy is a technique of observing nearby astronomical objects by reflecting microwaves off target objects and analyzing the echoes.

Steven J. Ostro ( 1946 – 2008 ) was an American scientist specializing in Radar astronomy.

# REDIRECT Radar astronomy

Various materials were found to absorb the energy from Radar waves, and were incorporated into special finishes that have since found widespread application.

NADGE / AEGIS were complemented, in West Germany by the German Air Defence Ground Environment ( GEADGE ), an updated radar network adding southern West Germany to the European system, and Coastal Radar Integration System ( CRIS ), adding data links from Danish coastal radars.

Radar relies on its own transmissions rather than light from the Sun or the Moon, or from electromagnetic waves emitted by the objects themselves, such as infrared wavelengths ( heat ).

Radar multipath Light echo | echoes from a target cause ghosts to appear.

Radar jamming refers to radio frequency signals originating from sources outside the radar, transmitting in the radar's frequency and thereby masking targets of interest.

Radar video returns from aircraft can be subjected to a plot extraction process whereby spurious and interfering signals are discarded.

Radar may give a warning before there is any visual evidence of a tornado or imminent tornado, but ground truth from an observer can either verify the threat or determine that a tornado is not imminent.

Radar corner reflectors made of metal are used to reflect radio waves from radar sets.

Radar multipath echoes from an actual target cause ghosts to appear.

" (" Darkstar " is also a call sign of AWACS aircraft from a different squadron at Tinker AFB ) A month later, radio enthusiasts in California monitoring Edwards AFB Radar ( callsign " Joshua Control ") heard early morning radio transmissions between Joshua and a high flying aircraft using the callsign " Gaspipe ".

* October – A METI message Cosmic Call 1 sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, HD 178428 star.

* November – A METI message, Cosmic Call 1, sent from the 70-meter Eupatoria Planetary Radar in 1999, arrives at its destination, 16 Cyg A star.

* February – The Teen Age Message, an Active SETI message sent from the 70-meter Eupatoria Planetary Radar, arrives at its destination, the star HD 197076.

* April – A METI message Cosmic Call 2 sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, Hip 4872 star.

Mainland European France, viewed from the NASA Shuttle Topography Radar Mission

This image of mainland European France was generated with data from the Shuttle Radar Topography Mission ( SRTM ).

Surveyor 3 was the first spacecraft to unintentionally liftoff from the Moon's surface, which it did twice, due to an anomaly with Surveyor's Landing Radar which did not shut off the vernier engines but kept them firing throughout the first touchdown, and after it.

* Earthling ( band ) wrote in the song, " Nefisa " ( from album Radar ), the lyrics: " PVC costumes, letters to Castro, Show me what you're reading, freaky girl with the afro, Franz ( sic ) Fannon, yeah yeah I get it, All that curiosity with something to offset it ".

The bomber went down six nautical miles from the Bay Shore Air Force Radar Site and close to the Big Rock Point Nuclear Plant.

The Department has around 9 Patrol vehicles ranging from 4-5 Dodge Chargers, 1 Ford Explorer, 1 Dodge Sprinter Van, and 1 Ford Escape Hybrid outfitted as a Mobile Radar Photo Enforcement Unit made by Redflex Systems and acquired in late 2011.

Radar results from the Arecibo Observatory indicated that the comet nucleus was about across, and surrounded by a flurry of pebble-sized particles ejected at a few metres per second.

What is believed to be the first adaptive routing network of computers, using link-state routing as its heart, was designed and implemented during 1976-77 by a team from Plessey Radar led by Bernard J Harris ; the project was for " Wavell "-a system of computer command and control for the British Army.

* May – A METI message Cosmic Call 2 sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, 55 Cancri star.

* September – A METI message Cosmic Call 2 sent from the 70-meter Eupatoria Planetary Radar arrives at its destination, HD 10307 star.

NATO pilots use the brevity code Fox One in radio communication to signal launch of a Semi-Active Radar Homing Missile such as the Sparrow.

* Radar: The ( monostatic ) radar cross section is defined as 4 π times the radio differential cross section at 180 degrees.

* Radar, locating objects by detecting the echo of emitted radio waves

Radar is an object-detection system which uses radio waves to determine the range, altitude, direction, or speed of objects.

Radar waves scatter in a variety of ways depending on the size ( wavelength ) of the radio wave and the shape of the target.

Radar corner reflectors are designed to reflect the microwave radio waves emitted by radar sets back toward the radar antenna.

The Radar Rangers are an amateur radio enthusiast group that helps Buckaroo track major threats.

Radar speed guns, like other types of radar, consist of a radio transmitter and receiver.

Radar transmitters send out regular brief pulses of radio energy, the reflections from which are displayed on a CRT screen.

: Every vessel must at all times maintain a proper look-out by sight ( day shape or lights by eyes or visual aids ) and hearing ( sound signal or Marine VHF radio ) as well as by all available means ( e. g., Radar, Automatic Radar Plotting Aid ( ARPA ), Automatic Identification System ( AIS ), GMDSS ...) in order to make a full assessment of the situation and risk of collision.

* Ulm, Elisabethenstrasse: Radar, Radiolocation, detection equipment, speech and radio data transmission systems, Research Centre ( now Telefunken Racoms )

He is credited with three patents related to the design of Motorola's SCR-300 FM " Walkie-Talkie " radio, a hugely popular unit with American forces in Europe, and he received a U. S. Navy Certificate of Commendation for Outstanding Service for development of the AN / CPN-6 Radar Beacon, a microwave device which aided carrier pilots to find their ship during low visibility conditions.

Radar systems generally work by connecting an antenna to a powerful radio transmitter to emit a short pulse of signal.

* Funkgerät ( prefix: FuG ) — generic term for radio and airborne IFF, RDF and airborne and some ground based Radar equipment.

The single " Radar Gun " was a hit on rock radio — reaching No. 27 on Billboards rock chart — and the band toured extensively to support the album.

After the Bottle Rockets ' promising eponymous debut, having a radio hit (" Radar Gun ") on their second album, extensive touring, and resounding critical acclaim, the band endured a decade of subsequent hard luck ( including having their career held hostage to a staggering series of record companies they'd had contracts with that folded and / or floundered, a UPS strike holding up distribution of one of their new records, band personnel changes, and family emergencies during prominent tours ).

Radar detectors, which detect radio transmissions, are therefore unable to detect the infrared light emitted by LIDAR guns so a different type of device called a LIDAR detector is required.

Radar warning receiver ( RWR ) systems detect the radio emissions of radar systems.

* Howland, P. E., Maksimiuk, D., and Reitsma, G .: " FM radio based bistatic radar ", Radar, Sonar and Navigation, IEE Proceedings, Vol.