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<br />_. I <br /> <br />. <br /> <br />XI1. <br /> <br />INSTRUMENTATION AND EQUIPMENT <br /> <br />Instrumentation and equipment for the HIPLEX-l experiment are grouped <br />into six categories: (1) aircraft, (2) radar, (3) rawinsonde, (4) <br />surface mesoscale network" (5) forecast support, and (6) cameras. <br />Because the test clouds for HIPLEX-l produce only sma"ll amounts of <br />precipitation over small areas, there will be no attempt to install a <br />surface precipitation-gagE! network dense enough to estimate adequately <br />the rain from individual clouds. However, surface precipitation <br />measurements covering a portion of the project area will be available <br />from the mesoscale network when it is installed, and radar data and <br />aircraft hydrometeor measurements will permit estimates of subcloud <br />and cloud-base precipitat..ion for clouds in the entire project area. <br />Details of the instrumentiition and equipment are presented in <br />appendix G. <br /> <br />A. Aircraft <br /> <br />The University of Wyomin~1 King Air cloud physics aircraft will <br />examine the detailed micy'ophysics, and some of the dynamics, of the <br />test clouds. It has instruments to record the location, altitude, <br />and performance of the a"ircraft, plus temperature, dewpoint tempera- <br />ture, horizontal and vertical wind, liquid water content, turbulence, <br />ice-nucleus counts, and properties of cloud and precipitation particles <br />(liquid and solid). Much of the data will be recorded on magnetic <br />tape. The King Air is equipped with an onboard computer to facilitate <br />collection and onboard display of the data. The University of Wyoming <br />also has a ground-based computer system that allows near-real-time <br />processing of much of thl~ data and permits 1 imited, but important, <br />in-the-field analysis. <br /> <br />The Colorado International Corporation Learjet 23 seeding aircraft <br />is equipped to dispense either dry ice or silver iodide (though no <br />silver iodide seeding is expected for HIPLEX-l). The Learjet is also <br />equipped to make some cllJud phys ics measurements. It has instruments <br />to record the altitude, location, and performance of the aircraft, <br />plus temperature, dewpoint temperature, liquid water content, and ice- <br />particle concentration. The data acquisition and processing system <br />on the Learjet is controlled by an onboard computer. <br /> <br />The instruments on the research aircraft will often be compared by <br />flying in formation to or from the region of operations. Periodic <br />checks of the aircraft py'essure, temperature, and dewpoint sensors <br />will be made by conducting tower flybys. <br /> <br />35 <br />