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A radar signal is an electromagnetic (EM) wave, and as such will travel at the speed of light in the atmosphere. If part of the space has different EM properties, then some of the wave will be reflected from that region.
Solid objects are the most conspicuous, but rain radarsees the changes in the atmosphere caused by the rain clouds.
One of the most remarkable uses for radar is to measure the wind profile behind an aircraft carrier - the place where the incoming planes approach their carrier.
For this, a very brief high energy acoustic pulse is sent out, and this will cause compressions and rarefactions in the air behind the carrier.
Amazingly (to me) these minute differences in the EM properties of this space can be picked up by a radar.
The carrier always steams into the wind (when active) and the wind flows along the deck, and drops down in the wind shadow behind the carrier. This is precisely where the incoming plane is aiming to land, and a 'down draft' at this point will not help his accuracy. Thus the knowledge of the wind profile is of great value to the flight controller and the incoming pilot.
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How the bat speed is measured in cricket?
By Speed Radar !!
Does radar determine the size of an object?
Radar is usually used only to determine where something is, not how large it is, because the strength of the reflection depends upon the reflectivity of the surface, the distance of the object, and the size of the object; a large wooden object can return less of a signal than a much smaller metal object, for example. It's too complicated a problem. But if you already know that you are looking, let us say, for an airplane, then radar is very good at showing you where the plane is.
If you put larger diameter tires on your car how would the speedometer reading compare to the speed measured by a radar gun?
idon't know about the speedometer reading but the speed the radar gun is the same as the relative movement of the vehicle not the speed at which the tires revolve
Why haven't tornadoes been clocked at higher speeds than 200 miles per hour?
If you mean wind speeds, there have been. On May 24, 2011 Doppler radar measured winds in a tornado to over 210 mph. On April 26, 1991 Dopper radar measured winds in a tornado of at least 257 mph. On May 3, 1999 Doppler radar measured the highest wind ever recorded in a tornado at 302 mph. Aside from direct measurement, since the Enhanced Fujita scale was created in 2007 the U.S. has had seven tornadoes with winds estimated to be over 200 mph based on damage.
What is the property that reflects light?
Reflectivity is the property that reflects light.
How is reflectivity measured with radar?
Used to estimate precipitation intensity and rainfall rates
What is the difference between base reflectivity and composite reflectivity in terms of weather radar?
From NOAA website:http://weather.noaa.gov/radar/radinfo/radinfo.htmlBase ReflectivityThis is a display of echo intensity (reflectivity) measured in dBZ (decibels of Z, where Z represents the energy reflected back to the radar). "Reflectivity" is the amount of transmitted power returned to the radar receiver. Base Reflectivity images are available at several different elevation angles (tilts) of the antenna and are used to detect precipitation, evaluate storm structure, locate atmospheric boundaries and determine hail potential.The base reflectivity image currently available on this website is from the lowest "tilt" angle (0.5°). This means the radar's antenna is tilted 0.5° above the horizon.The maximum range of the "short range" (S Rng) base reflectivity product is 124 nm (about 143 miles) from the radar location. This view will not display echoes that are more distant than 124 nm, even though precipitation may be occurring at greater distances. To determine if precipitation is occurring at greater distances, select the "long range" (L Rng) view (out to 248 nm/286 mi), select an adjacent radar, or link to the National Reflectivity Mosaic.Composite ReflectivityThis display is of maximum echo intensity (reflectivity) from any elevation angle at every range from the radar. This product is used to reveal the highest reflectivity in all echoes. When compared with Base Reflectivity, the Composite Reflectivity can reveal important storm structure features and intensity trends of storms.The maximum range of the "long range" (L Rng) composite reflectivity product is 248 nm (about 286 miles) from the radar location. The "blocky" appearance of this product is due to its lower spatial resolution on a 2.2 * 2.2 nm grid. It has one-fourth the resolution of the Base Reflectivity and one-half the resolution of the Precipitation products.Although the Composite Reflectivity product is able to display maximum echo intensities 248 nm from the radar, the beam of the radar at this distance is at a very high altitude in the atmosphere. Thus, only the most intense convective storms and tropical systems will be detected at the longer distances.Because of this fact, special care must be taken interpreting this product. While the radar image may not indicate precipitation it's quite possible that the radar beam is overshooting precipitation at lower levels, especially at greater distances. To determine if precipitation is occurring at greater distances link to an adjacent radar or link to the National Reflectivity Mosaic.For a higher resolution (1.1 * 1.1 nm grid) composite reflectivity image, select the short range (S Rng) view. The image is less "blocky" as compared to the long range image. However, the maximum range is reduced to 124 nm (about 143 miles) from the radar location.
What has the author Anne I Mackenzie written?
Anne I. Mackenzie has written: 'Measured changes in C-band radar reflectivity of clear air caused by aircraft wake vortices' -- subject(s): Aircraft wakes, Microwave devices, Microwave frequencies, Radar, Radar detection, Vortex motion, Vortices, Wakes (Aerodynamics)
Winds in the upper atmosphere are measured by?
Graphs or Radar
How the bat speed is measured in cricket?
By Speed Radar !!
How is the speed of a ball measured by a radar gun?
Speed is measured by distance traveled divided by time taken. These radar guns measure exactly how far the ball goes within a time frame.Ê
What does the level of reflectivity show meteorologists?
The level of reflectivity shows the amount of precipitation. For example, if the radar map is a lighter blue, then the blue light is being reflected, or rather, is visible to the radar. This is usually around 15-20 dBZ, which indicates light rain. The higher the dBZ is, the higher the amount of precipitation is. So, 60 dBZ of rain would indicate more severe storms. The light being reflected at this point is more red.
What is a special type of weather radar that can be used to track severe weather by detecting wind speed and direction?
Doppler radial velocity, rather than the usual base reflectivity scans.
What is a planet's reflectivity called?
A planet's reflectivity is called it albedo.
How do you find the speed on RC cars?
Time to cover a measured distance, or a radar gun.
Is the speed of cricket ball measured at bowler's end or at batsmen's end?
The speed is measured by radar from the batsman's end as the ball leaves the bowlers hand.
Are humans causing global warming by reflectivity?
Not by reflectivity, but by fossil fuel combustion and deforestation.
