Accession Number : ADA255868


Title :   On the Potential Use of the Terminal Doppler Weather Radar Gust Front Detection Algorithm on the WSR-88D System. Part 1: Impacts of Radar System Differences


Descriptive Note : Interim rept.


Corporate Author : NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION NORMAN OK NATIONAL SEVERE STORMS LAB


Personal Author(s) : Stumpf, Gregory J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a255868.pdf


Report Date : Sep 1991


Pagination or Media Count : 42


Abstract : The feasibility of using the gust front detection algorithm (GFDA) developed for the Terminal Doppler Weather Radar (TDWR) system on a Next Generation Weather Radar WSR-88D (formerly NEXRAD) system is assessed. The data resolution and tilt sequences of the WSR-88D system are different than TDWR, and the WSR-88D is designed to operate at greater ranges. To test the effect of the decreased data resolution of WSR-88D, TDWR-like data were degraded to the resolution of WSR-88D and the GFDA was tested on this degraded dataset. Also, the GFDA was tested on a gust front which occurred outside the normal 60-km range in which data are processed for TDWR. Results show that the degraded velocity precision of WSR-88D has little effect on the performance of the GFDA However, the larger sample volume sizes for the WSR-88D system did degrade the performance of the GFDA. The second lowest tilt angle for the WSR-88D tilt sequences is about 0.5 deg higher than TDWR, and this reduced the maximum range of gust front detectability. These tests show that the GFDA's performance on the WSR-88D system will be acceptable after a few modifications.


Descriptors :   *DOPPLER RADAR , *METEOROLOGICAL RADAR , *WIND SHEAR , *GUSTS , TEST AND EVALUATION , VELOCITY , ALGORITHMS , ANGLES , TILT , TERMINALS , CIVIL AVIATION , PRECISION , SEQUENCES , DETECTION , WEATHER , MODIFICATION , RESOLUTION


Subject Categories : Meteorology
      Active & Passive Radar Detection & Equipment


Distribution Statement : APPROVED FOR PUBLIC RELEASE