Results 1 - 15 of about 280 sawaal for "radars"
a rotating directional radar antenna that emits a beam to search for or locate objects is known as radar searching device....its a radio transciever wideband that detects radio emissions...Phased Array radar is NSSLs newest radar frontier, with the potential to significantly increase warning lead times and the ability to perform multiple functions. The National Weather Radar Testbed NWRT was created
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Computers & Technology by payal at 12:00 AM on November 06, 2007
1. A search radar system including at least first and second radar devices coupled to respective first and second radar antennas, target data processing means for processing target data produced by said radar devices, and radar display means, characterized in that: a. the antennas are arranged for rotation together but with mutually different orientations in azimuth; Answered by: Dhrubajyoti at 10
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Computers & Technology by at 12:00 AM on November 06, 2007
Radar is an acronym for "radio detection andranging" that is an electronic system for transmitting electromagnetic signals and receiving echoes from objects of interest targets.A radar system usually operates in the ultra-high-frequency UHF ormicrowave partof the radio-frequency RF spectrum, and is used to detect theposition and/ormovement of objects. Radar was designed shortly before
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Electronics & Gadgets by ritu.dhawan at 12:33 AM on February 29, 2008
A tracking radar system having: an antenna with at least one boresight; means for producing signals indicating an angular difference between the direction of a target and the said one boresight radar system according to claim 1 wherein said control means includes means responsive to the threshold being exceeded, for causing the boresight to continue to move in a direction in which it was moving
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Computers & Accessories by Kaushal at 11:54 AM on October 24, 2008
A radar is able to detect a small amount of power returned from a target. Obviously, the more sensitive the receiver, the more a radar is able to detect smaller or less efficient scatterers. The radar needs to average returned power from many successive pulses since the power returned from pulse to pulses is highly variable. A radar can increase its ability to detect a target by not only changing
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Computers & Accessories by Vinay at 5:00 PM on October 31, 2008
A range folded echo is one that is detected beyond the maximum unambiguous range. These echoes will show up at a distance from the radar equal to R - Rmax, where R is the distance from the radar to the actual echo returns and Rmax is the maximum unambiguous range. For example if a storm is 300 miles from the radar and the maximum unambiguous range is 270 miles, the storm will be shown on radar at a range
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Computers & Accessories by Vinay at 4:55 PM on October 31, 2008
.Example:What is the apparent attenuation of a beer with an OG of 1.055 and a FG of 1.016? 55 - 16 / 55 x 100 = 71...well;Attenuation is the weakening of a radar beam as it moves downstream due to some of the energy being lost to scattering and absorption. The further a radar beam moves downstream the more dust, hydrometeors, etc. the radar beam will have to pass through. Because of attenuation, storms close to the radar are better
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Computers & Technology by Suparna at 8:36 PM on October 07, 2008
In a 3-D sense, a beam of radar emission has a cone shape. The tip of the cone is at the radar site and the diameter of the cone gradually increases away from the radar site. As a radar beam moves further from the radar, it expands to take up a larger volume. An example of this process is to turn out the lights and shine a flashlight on the wall. First stand 2 feet from the wall and then gradually
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Computers & Accessories by Gyan Singh at 12:45 AM on October 31, 2008
Anomalous Propagation is abbreviated as AP. AP and false echoes are one of the biggest enemies of the radar meteorologist. Those without experience in radar meteorology are often "burned" by AP and false echoes. AP is a false reflectivity echo on radar a reflectivity echo that is NOT precipitation, especially echoes produced by unusual rates of refraction in the atmosphere. With experience
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Computers & Accessories by Gyan Singh at 12:47 AM on October 31, 2008
The Pulse Repetition Frequency PRF is the number of radiation pulses emitted by radar in 1 second. For example, if the radar emits 400 pulses in one second then the PRF is 400 pulses/second. Think of pulses like the pulses of a strobe light. A strobe light alternates between light and dark and there is light a certain number of times within a given period of time. Radar is similar except the number
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Computers & Accessories by Vinay at 1:00 AM on October 31, 2008
btracking radar...Radar used to eliminate clutter in navigational application is -Tracking radar....Radar used to eliminate clutter in navigational application is -Tracking radar....Radar used to eliminate clutter in navigational application is -Tracking radar....Radar used to eliminate clutter in navigational application is -Tracking radar....well, btracking radar...b. Tracking radar...Radar used
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Computers & Technology by Nawraj at 9:38 PM on June 26, 2008
of the energy of sound waves as they pass through a material. Materials are rated for their ability to prevent sounds from traveling through them.Attenuation is the weakening of a radar beam as it moves downstream due to some of the energy being lost to scattering and absorption. The further a radar beam moves downstream the more dust, hydrometeors, etc. the radar beam will have to pass through. Because
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Computers & Technology by seeta rani at 11:23 AM on May 22, 2008
Radar is an acronym for "radio detection andranging" that is an electronic system for transmitting electromagnetic signals and receiving echoes from objects of interest targets.A radar system usually operates in the ultra-high-frequency UHF ormicrowave partof the radio-frequency RF spectrum, and is used to detect theposition and/ormovement of objects....Depends which radar we are talking
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Computers & Technology by prashant at 11:21 PM on March 03, 2008
On radial velocity, red and yellow colors represent motion away from the radar and greens and blues represent motion toward the radar.As the radar beam moves away from the radar site it will usually increase in altitude as range from the radar increases. Thus, locations near the radar site will be sampled close to the surface while locations at the outer range of the radar will be sampled at a much
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Computers & Accessories by Vinay at 1:01 AM on October 31, 2008
Ducting is exceptional super-refraction. Super-refraction occurs when the trajectory of a radar beam bends towards the earths surface more than normal. In other words, the rate the elevation of the radar beam changes with distance away from the radar is less than normal. The radar beam will tend to increase in height above the earths surface when moving away from the radar site because of the earths
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Computers & Accessories by chandan at 12:34 AM on October 31, 2008
