11/3/2023 0 Comments Edge texas doppler radar![]() This is a problem known as the "Doppler dilemma," in which a low PRF is desired for a large unambiguous range, but a high PRF is desired to observe high velocities. The maximum unambiguous velocity and maximum unambiguous range both depend on the pulse repetition frequency (PRF) but in opposite ways. This phenomenon is known as aliasing or velocity folding.Īliasing occurs when the radar's maximum unambiguous velocity is lower than the maximum velocity that is occurring. The outlined areas in which the colors abruptly change to the opposite sign are a manifestation of the radar's maximum measurable velocity range. What we see here are in fact winds that change evenly from southerly at the surface to westerly at the edge of the radar's range that have a maximum speed at the level of the first range ring. ![]() Though one would normally conclude that the wind direction is somehow the opposite of the rest of the surrounding area and moving very fast, this is not correct. In some cases when very high wind speeds are present, such as when the radar samples strong jets or tropical cyclones, a radial velocity maximum or minimum will contain colors from the opposite wind direction in its center. Use radar imagery to identify instances of anomalous propagation, velocity and range folding, non-meteorological targets, and other radar artifacts.Use radar imagery to identify common features of precipitating phenomena, such as winter storms, convection, and tropical cyclones.Use radar imagery to identify phenomena that commonly occur during otherwise fair weather including dust storms, smoke, horizontal convective rolls, fronts, and other boundaries.Interpret precipitation intensity and movement using radar reflectivity imagery.Interpret wind speed and direction using Doppler radial velocity imagery.Describe the primary uses and limitations of radar data as well as factors that affect data quality and interpretation.Explain the basic principles of weather radar operation. ![]() Although intended as an accelerated introduction to understanding and using basic Doppler weather radar products, the module is also an excellent refresher for more experienced users.īy the end of this module, users will be able to: This 2-hour module discusses the fundamental principles of Doppler weather radar operation and how to interpret common weather phenomena using radar imagery.
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