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<br />2.0 DATA AND QUALITY CONTROL <br /> <br />Data used in this research were collected in the High Plains <br />Cooperative Program (HIPLEX) in west Texas during 1979. Four basic <br />data sets were collected: 1) rawinsonde data from a meso-network of <br />seven stations in Texas during 1979, 2) digital Skywater "e"-band <br />radar volume scan data, 3) recording Belfort rain gage data and 4) <br />geosynchronous satellite imagery. Observations from the 1979 field <br />season from May 20, 1979, to July 19, 1979, were analyzed. <br /> <br />2.1 Rawinsonde Observations <br /> <br />Special mesonet rawinsonde data were collected during 20 mesoscale <br />events in the 1979 field season by personnel from Texas A&M University <br />(Williw~s et al., 1980). Serial releases of soundings from seven sites <br />every 3 h were made from 1500 to 0300 GMT on most mesoscale case study <br />days. Rawinsonde sites were separated by 80 to 110 km, covering a <br />region of approximately 20 by 20 latitude shown in Fig. 2.1. <br /> <br />All soundings were processed using error-checking procedures devel- <br />oped by Fuelberg and Scoggins (1974) which examine contact point infor- <br />mation for errors and check temporal and spatial continuity of soundings <br />for gross errors. These were then processed in a format having up to <br />30 significant levels and 9 mandatory levels for the Bureau's Environ- <br />mental Data Network (EDN). All soundings available in the EDN were <br />plotted on skew T-log P diagrw~s in order to check for errors in wind <br /> <br />31 <br />