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<br />precipitation particle growth and the distribution of liquid water, <br />as measured by the lidar and radar, is described. These analyses <br />are complete for three 1987 STORMS and results are presented in <br />Section 5. <br />}). Instrumentation <br />Remote sensing (lidar, Ka-band, and a radiometer) and other <br />instrumentation have been described in earlier reports (Long, 1987b <br />and Long, 1986). These reports have discussed the importance and <br />advantages in using remote sensors to study clouds above mountainous <br />terrain where cloud physics aircraft cannot safely fly. <br />The UDWR contracted with several groups to provide the field <br />instrumentation. The groups and their observational responsi- <br />bilities are listed in Table 2. The locations of the instru~ents <br />and other observing sites are shown in Fig. 1 and listed in Table <br />3. SF6 was released from the site west of Beaver. As shown in Fig. <br />1 rawinsondes were launched from two sites in 1987 in order to <br />compare the winds over the valley to those over the foothills and <br />mountains. Rawinsondes were typically launched at 3-h intervals <br />during storms and tracked with RD-65 equipment. <br />At the remote sensing site in the mountains (Merchant Valley) <br />were the microwave radiometer, the Ka-band radar and the polariza- <br />tion diversity lidar. Past reports, e.g., Long (1986) discuss the <br />reasons for the instrument sitings. The Merchant Valley site was <br />chosen primarily to ensure that measurements of liquid water would <br />be made above the Qoe isotherm. The radar was operated in <br />vertically pointing mode and gathered reflectivity data. The <br />radiometer was either scanned in azimuth or operated in fixed <br /> <br />10 <br />