States had two, the Researcher and the Advance II, and many 

 smaller vessels. 



The IFYGL buoy, tower, and automatic meteorological stations 

 measured current, water temperature, water levels, and surface 

 meteorological parameters. This network included 11 Canadian and 

 10 U.S. buoys. 



Two U.S. and one Canadian weather radars made routine 

 observations and measured precipitation intensity for small areas 

 and time elements. Precipitation observations were obtained from 

 the conventional climatological network within the basin. A special 

 rainfall network was deployed and operated south of Rochester, a 

 special snowfall network in the eastern part of the basin. These 

 precipitation observations are being used to calibrate and test the 

 radar, storm by storm, as a precipitation-measuring data acquisition 

 system. 



Advanced rawinsonde systems were operated from three United 

 States and three Canadian stations around the Lake. 



Aircraft were used to measure vertical fluxes of heat, moisture, 

 and momentum in the atmospheric boundary layer and to make 

 meteorological observations of temperature, dew point, and wind 

 velocity. Other aircraft remotely sensed surface temperature and 

 snowpack water content and made multispectral and radiation 

 measurements. 



DATA MANAGEMENT 



All IFYGL data collections were submitted to the United States 

 and Canadian data centers and there will be complete international 

 data exchange. As shown in Figure 1, the data management activity 

 overlaps the Field Year, but continues well into 1975. The 

 Environmental Data Service, NOAA, is responsible for the 

 management and coordination of all IFYGL data collected by U.S. 

 investigators and copies of all Canadian data. 



The data centers will maintain an IFYGL data catalogue, 

 summarized data, quality-controlled and documented processed 

 data, and raw data. Processed data will comprise the largest part of 

 the data bank and will consist of data collected by the agencies, 

 translated, checked, and verified. The data management philosophy 

 is to make all IFYGL data, data products, and data support 

 information available to interested persons as easily and as 

 inexpensively as possible. 



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