Radar Meteorology Glossary
This glossary will be the main reference for radar products and problems and will give details on what the different products are and how they are used.
Browse the glossary using this index
Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL
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DealiasingProcess of removing undesirable aliases from the velocity field, i.e. the correction of the process of aliasing. | |
DecibelAn logarithmic expression for ratio of two quantities. dBm is a decibel with respect to 1 milliwatt. Mathematically: dB = 10 log (P1/P2) dBm = 10 log (P/10-3) dBZ = 10 log (Ze) | |
Differential Phase Shift φDPDescriptionDifferential phase shift φDP is the phase shift between the horizontally polarized wave and the vertically polarized wave.Notes• Since φDP is not affected by attenuation, it can be used to develop and check attenuation correction schemes.• Attenuation correction based on using the total Differential Phase Shift as a constraint is selectable for reflectivity products. Reflectivity products can be viewed with or without attenuation correction. Correction of Differential Reflectivity due to differential attenuation is also available. | ||
Differential reflectivityRatio between the reflectivity of a horizontal polarized pulse and the reflectivity of a vertical polarized pulse. ZDR depends on the asymmetry of the shape, the orientation and the falling behaviour of the particles. ZDR is positive for oblate raindrops, zero or slightly negative for hail and graupel. Note that ZDR is strongly biased by differential attenuation during the passage of the radar pulse through heavy rainfall. | ||
Display ResolutionThe area or two-dimensional product of the X and Y coordinates represented by one picture element (pixel) of a raster scan display. | |
DistortionUndesired change in a signal resulting in unfaithful reproduction of video or audio. | |
Doppler DilemmaThe interdependence of maximum unambiguous range and maximum unambiguous velocity on the pulse repetition frequency, PRF. As PRF is increased (decreased), the range of unambiguous velocities increases (decreases), but the unambiguous range decreases (increases). | |
Doppler EffectChange in observed frequency of wave energy due to relative motion of the observer and wave source. | |
Doppler Radar | |