edu.ucar.opensky::technotes:238 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-26T17:32:49.518289 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7n8796v Internal Storm Motions From a Single Non-Doppler Weather Radar 1979-01-01T00:00:00Z publication https://n2t.org/ark:/85065/d7n8796v https://doi.org/10.5065/D6XS5S9P Rinehart, R. author UCAR/NCAR - Library publisher A correlation analysis pattern recognition technique called TREC (for tracking radar echoes by correlation) is developed which is capable of determining motions within storms. The limitations and capabilities of TREC were explored using two approaches. First, the properties of real radar echoes (reflectivities, reflectivity gradients, and temporal and spatial decorrelations) were studied for their effect on the results of TREC. Radar echoes contain a variety of scales of reflectivity patterns which persist temporally and spatially quite well; useful results are possible to about 100 km or more, depending upon the motion scale size and radar resolution available. Second, flow fields and reflectivity fields were modeled to examine those properties of TREC that could not be studied using real storms. This study showed that the success of TREC depends upon the interrelationships between the flow and reflectivity field characteristics as well as the parameters of TREC processing. A comparison of TREC results with data from a triple-Doppler radar system showed that TREC vectors are apparently often generated either above or below the level being examined. A number of suggestions are given for applying TREC to other storm situations and other radars. Finally, the advantages and disadvantages of TREC and the overall conclusions are summarized. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Radar Wind dynamics Precipitating convective cloud systems theme U.S. National Aeronautics and Space Administration Global Change Master Directory GCMD 2021-09-17 revision 11.2 NASA Global Change Master Directory originator Valids List: Science and Services Keywords Copyright Author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation