When a pulse encounters a target...
it is scattered in all directions. Of interest is the signal component received back at the radar. This signal is typically much weaker than the original sent from the transmitter and is called the "return signal".
Pulse Repetition Frequency (PRF) - the amount of time between successive pulses, or bursts, of electromagnetic energy that is transmitted by a radar.
PULSE A very short duration of time. In regard to a radar, it is a brief burst of a electromagnetic radiation emitted by the radar.
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Pulse-Pair Processing Nickname for the technique of mean velocity estimation by calculation of the signal complex covariance argument. The calculation requires two consecutive pulses, hence "pulse-pair".
PULSE STORM- Storm with a strong updraft due to strong instability release that develops in a weak shear environment. Pulse storms can produce brief severe weather.
Pulse
A short burst of electromagnetic energy that a radar sends out in a straight line to detect a precipitation target. The straight line that this pulse travels along is called a radar beam.
Pulse Duration ...
pulse length—Pertaining to radar, the dimension of a radar pulse; may be expressed as the time duration or the length in linear units.
*Pulse Storm - A thunderstorm within which a brief period (pulse) of strong updraft occurs, during and immediately after which the storm produces a short episode of severe weather.
Peak PulseThe amount of power transmitted by a radar during a given pulse. Note that because these pulses are widely spaced, the average power will be much smaller.
Pulse Storm - A thunderstorm that lasts for a brief period (pulse). If the storm contains strong updrafts, the storm can produce a short episode of severe weather.
Average Power: Pulsed radars transmit over a very low duty cycle; i.e., many intense but short and widely separated pulses. The average power is a radar's peak power "its PRF" its pulse length (duration).
Radar BeamThe straight line that a radar pulse travels along. As the radar beam gets further away from the radar, it gets wider and wider.
As the radar sends out a pulse of energy, the pulse hits a target and part of the energy bounces back to the radar, but part of the energy may continue to travel away from the radar.
Pulse-time-modulated radiosonde A radiosonde which transmits the indications of the meteorological sensing elements in the form of pulses spaced in time. The meteorological data are evaluated from the intervals between the pulses.
An optical ceilometer uses triangulation to determine the height of a spot of light projected onto the base of the cloud; a laser ceilometer determines the height by measuring the time required for a pulse of light to be scattered back from the ...
The signs of heat stroke include when an individual's body temperature is greater than 105 degrees Fahrenheit, the skin is hot and dry, there is a rapid and irregular pulse, perspiration has stopped, and one has lost consciousness.
1941 - Pulsed radar network is implemented in England during WWII. Generally during the war, operators started noticing echoes from weather elements suchs as rain and snow.
ImperviousIn hydrologic terms, the ability to repel water, or not let water infiltrateIMPLImpulse- Alternate term for Upper Level System and Shortwave; ...
VCP 31 has a long pulse length and provides a better signal-to-noise ratio permitting lower reflectivity returns to be detected. VCP 32 has a short pulse length which provides for larger unambiguous velocity values.
Modulation Variation in the frequency of a radio wave in accordance with some other impulse. Modulation is essential to communication systems in which a number of different signals must all share the same medium.
maximum unambiguous range"The maximum range from which a transmitted radar, lidar, or sodar pulse can be reflected and received before the next pulse is transmitted.
A thunderstorm that undergoes cycles of intensification and weakening (pulses) while maintaining its individuality. Cyclic supercells are capable of producing multiple tornadoes (i.e., a tornado family) and/or several bursts of severe weather.
To find the force on a plane surface normal to the wind, we can use the impulse-momentum principle mΔv = FΔt.
A thunderstorm that undergoes cycles of intensification and weakening (pulses) tornadoes (i.e., a tornado family) and/or several bursts of severe weather. A storm that undergoes only one cycle (pulse), and then dissipates, is known as a pulse storm.
A storm which undergoes only one cycle (pulse), and then dissipates, is known as a pulse storm.
Cyclogenesis - Development or intensification of a low-pressure center (cyclone).
Lightning strikes last only a few millionths of a second. The strikes are made up of several pulses comimg so close together, our eyes cannot always distinguish them. These fast pulses make lightning flashes seem to flicker.
An anemometer that measures linear components of the wind vector by determining the effect of the wind on transit times of acoustic pulses transmitted in opposite directions across known paths.
Laser Radar
(Lidar-light detection and ranging) Method for investigating atmospheric behavior using pulsed light beams (lasers).
Light Air
Wind with a speed between 1 and 3 knots.
DIGITAL: Pertaining to measurements or devices in which the output varies in discrete steps (e.g., on-off pulse signals); compare to analog.
A persistent and/or large overshooting top (anvil dome) often is present on a supercell. A short-lived overshooting top, or one that forms and dissipates in cycles, may indicate the presence of a pulse storm or a cyclic storm.
 See also: Weather, Radar, Surface, Precipitation, Water
  
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