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<br />used to compute liquid depths for experiments when the mobile radiometer altitude <br />varied considerably. <br />The objectives of the 1994 mobile radiometer experiments were to determine the <br />spatial distribution of SLW over the Wasatch Plateau under a variety of storm conditions, <br />and measure SLW values inside and outside seeding plumes that transected the highway <br />at the upwind edge of the top of the Plateau. The primary routes of the mobile <br />radiometer are shown in Fig. 1 (highways 31 and 264) and a picture of the unit as it <br />traveled Highway 31 is shown in Fig. 4. Seeding plumes generally crossed Highway 31 <br />between its junction with 264 and RRS, so repeated transects of this section of highway <br />were used to monitor conditions within plumes. On occasion the radiometer was parked <br />on the downwind side of the top of the Plateau for the purpose of comparing SLW <br />depths with the stationary USBR radiometer at RRS on the upwind side. This mode of <br />data collection was intended to detect changes (primarily depletion by precipitation) in <br />SLW across the top of the Plateau, and also monitor the SLW in mesoscale phenomena <br />as they crossed the Plateau. <br />Table 3 documents all mobile radiometer operations for the 1994 NOAA/Utah field <br />program. Data from one of the two rawinsonde comparisons is shown in Fig. 5, <br />and preliminary data from a transect along the upwind highway is shown in Fig. 6. <br />The radiometer-rawinsonde comparison indicates that the tipping curve calibration <br />(Decker and Schroeder, 1991) and atmospheric coefficients used for real time data <br />processing during the field program produced very accurate computations of vapor <br />depth. <br />The mobile radiometer data will be integrated with data sets from the research <br />aircraft, the K.-Band radar, the mobile microphysics van, and the stationary radiometer <br />to provide a more complete picture of the characteristics of the mountain storms and the <br />possible impacts of the seeding experiments. Liquid water fluxes, derived from Plateau <br />wind data and stationary radiometer measurements, will be compared to mobile <br />radiometer liquid fluxes for those periods when the mobile radiometer was located on the <br />downwind side of the Plateau. <br /> <br />11 <br /> <br />I <br />I <br />I' <br />I ' <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />