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<br />SITE AND SEEDING CONSIDERATIONS <br /> <br />At the onset of this research project it was decided that APES would include 3 <br />units: a base unit with meteorologic sensors and liquid propane dispenser, <br />and 2 satellite dispensers. The base unit would control the 2 satellite <br />dispensers. Liquid propane would be released at rates of 3 to 3.5 pounds per <br />hour to create large numbers of ice crystals by chilling the air near the <br />propane nozzles. This can initiate snow production when supercooled liquid <br />clouds are present. Supercooled liquid clouds have vast numbers of tiny <br />liquid droplets that are unfrozen at temperatures colder than 00 C. Such <br />clouds are frequently found during portions of many Utah winter orographic <br /> <br />storms. <br /> <br />~i:?;,~ .'::~~:_~ <br /> <br />'....r~:.;-.;":; .' ..-"i ..',' <br />~~~.. " ~~ . . <br />.~l:'~}~~.~"'~':" ':: ..' " <br />-~~", ~,:..!r"i"'" , <br />it. .' J' ", :O"'~;T ....~_ <br />;~.~ ~_"~~ c-..I'_ <br /> <br /> <br />.. <br /> <br />.Zj~;::~~ <br />_~ot:o." <br />.,..\~. ~'fIlII" . <br />.~ ~~"~~.. . <br />~ - . ,...- <br />........... .."'~" -...' .......... " . ... :_, <br /> <br />- <br /> <br />~ <br /> <br /> <br />Photograph 1. Testing of modified, remote-controlled, liquid propane unit in <br />mountains above Fairview, Utah, during 1992/93 winter. <br /> <br />4 <br />