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being slightly more effective due to its improved reception frequency. A system was developed to average wind data, store it for several hours, and transmit it from a remote site. This test of the LANDSAT system for operational use emphasized the value of continued research for its application. New technology acquired through development of the RAIN (Remote Auto-Initiated Network) will permit collection of one or more meteorological parameters at several sites and transmittal to a single LANDSAT DCP on a "self-timed" basis. In addition, under the GOES system all data collected can be transmitted and received as often as once per hour. With updated information on developments in the LANDSAT system, users have begun to develop long-range plans for data collection requirements. CONTRACTOR: Western Weather Consultants, Inc., Durango, Colorado PURCHASE ORDER NO. 6-01-ER-02552 PRINCIPAL INVESTIGATORS: L. M. Hjermstad and P. W. Mielke PERIOD: March to July 1976 FUNDING: $2,000 Under this purchase order, Western Weather Consultants, Inc., pre- sented a diagnostic evaluation technique to identify cloud types from data collected during Reclamation's 5-year CRBPP. The apparent modification potential of increased precipitation from ground-based silver iodide seeding was also assessed. An area-average method identified single orographic cloud systems with no higher clouds and with cloud top temperatures warmer than -23 oC as having a definite potential for precipitation augmentation. An important result of this study is that a reasonably consistent trend of cloud responses to ground-based seeding, dependent upon certain synoptic and meteoro- logical parameters, is emerging. These results can be simplified for operational application in areas similar to that of the pilot project by considering factors such as wind direction and velocity, cloud- base height in relation to height of the mountain barrier, and temperatures at various levels. II -12