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<br />During the years under discussion, three limited and two major field programs were held. The limited, <br />early 1990 program was conducted on the Wasatch Range and Wasatch Plateau, as discussed by Super <br />and Huggins (1992a, 1992b). <br /> <br />, <br />! - <br />i <br />! <br />! <br />! <br />t . <br />.~ <br />~ <br />! <br /> <br />I <br /> <br />1.5 Experimental Field Projects <br /> <br />Major field programs were held for 2 month periods on the Plateau during early 1991 and early 1994 <br />(both mid-January to mid-March). Major equipment used during these programs included: <br /> <br />. The NOAA Beechcraft King Air C-90 (N46RF) cloud physics and plume detection aircraft <br /> <br />. fixed and mobile microwave radiometers for monitoring vertically integrated liquid water and <br />water vapor <br /> <br />. weather radar <br /> <br />. fixed and mobile ground-based detectors for AgI (silver iodide) and SF 6 (sulfur hexafluoride) <br />tracer gas <br /> <br />. valley and high altitude AgI seeding generators and SF6 release equipment <br /> <br />. recording precipitation gage networks ' <br /> <br />local rawinsonde releases <br /> <br />automated weather stations <br /> <br />More information on these programs is provided in several papers summarized herein (e.g., Super 1994, <br />, 1995). . <br /> <br />Limited field programs took place on the Plateau during the 1994-95 and 1995-96 winters. These <br />programs used a single, high altitude release site with Agl and SF 6 release capabilities and automated <br />weather observations. A single target to detect the effects of seeding was operated on the west edge of <br />the Plateau top, as discussed by Super and Holroyd (1997). The target station was equipped to observe <br />Agl,.SF6, ice particle characteristics (by 2D-C laser probe), and supporting weather information. <br /> <br />1.6 Report Structure <br /> <br />The remainder of this report is made of 8 sections followed by references. The section titles are: <br /> <br />Section 2. Availability of Supercooled Liquid Water. <br /> <br />Section 3. Transport and Dispersion of Ground-Released Seeding Agents and Tracer Gas. <br /> <br />Section 4. Results of Physical Cloud Seeding Experiments. <br /> <br />Section 5. Numerical Modeling Results. <br /> <br />4 <br />