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on agriculture, in connection with HIPLEX. Field research in the Goodland- Colby area will reduce uncertainties about providing additional beneficial water supplies through precipitation management. Under this agreement, the Board operates an instrumented microclimate network to obtain data for agricultural, environmental, and climatological analyses and to help monitor cloud seeding effects. CONTRACTOR: States of Kansas, Colorado, and Nebraska CONTRACT NO. 14-06-D-7544 (Memorandum of Understanding) PRINCIPAL INVESTIGATOR: Not applicable CONTRACT PERIOD: May 29, 1975, to December 31, 1978 FY79 FUNDING: None PURPOSE: Cooperative weather modification research in the High Plains The States of Kansas,' Colorado, and Nebraska, and the Water and Power Resources Service signed a Memorandum of Understanding to acquire and expand knowledge of precipitation management for reducing scientific, economic, legal, social, and environmental uncertainties. The tri-State agreement provided the basic cooperation for the central HIPLEX study area, located in the Goodland-Colby, Kansas area near the junction of the three States. The States agreed to cooperate in planning, conducting, and evaluating weather modification activities and to take the primary role in performing studies related to HIPLEX research. The State agencies involved in this agreement are the Kansas Water Resources Board, Colorado Department of Natural Resources, and Nebraska Department of Agriculture. CONTRACTOR: University of North Dakota, Grand Forks, North Dakota CONTRACT NO. 14-06-0-7581 PRINCIPAL INVESTIGATOR: John D. Odegard PERIOD: September 1, 1974 - Continuing FY79 FUNDING: $205,560 Although the contract has a number of objectives, the major portion of the contract effort has been devoted to developing computer programs to edit, process, and analyze digital radar data from HIPLEX and the SCPP on both the Water and Power and UNO computer systems. To date, more than 54,140 data tapes have been edited into approximately 1,186 archived files. Permanent copies are retained by both UNO and Water and Power. A major contract effort is to provide scientific personnel and equipment in support of the Miles City HIPLEX site. The contractor furnishes and operates a research radar unit and rawinsondes, supplies meteorological monitoring capabilities for downwind research, and provides recorded digital radar tapes. Extensive analyses of rawinsonde data, first-echo radar statistics, general cl imatological analysis, stat ist ical representations of radar param- eters, and radar/satellite intercomparisons were undertaken. The contractor has also provided statistical comparisons of the UNO and Project Skywater radars to improve accuracy. Computer programs to provide radar-estimated precipitation patterns from Z-R relationships have been written. 10