Record Display for the EPA National Library Catalog


Main Title Instrumentation and Development of Techniques to Measure and Evaluate Meteorological Parameters Important to Hydrology.
Author Chadwic, Duane G. ;
CORP Author Utah Water Research Lab., Logan.
Year Published 1970
Report Number PRCWRR12-1; DI-14-0001-1865; OWRR-A-002-UTAH; 03375,; A-002-UTAH(3)
Stock Number PB-196 726
Additional Subjects ( Hydrometeorology ; Telemetering equipment) ; ( Meteorological instruments ; Data transmission) ; Snow surveys ; Wind(Meteorology) ; Precipitation(Meteorology) ; Analog computers ; Digital computers ; Remote areas
Library Call Number Additional Info Location Last
NTIS  PB-196 726 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 50p
A hydrologic data telemetering system was designed to have the highest accuracy of any FM/FM telemetering system known. The repeatability of readout approaches 0.05%. This accuracy is not appreciably deteriorated in the presence of high noise levels in radio telemetry transmissions. This high accuracy is obtained by: (a) a frictionless transducer; (b) a specially designed tracking filter; (c) a wide-range frequency deviation of plus or minus 40% permitting greater resolution and accuracy; (d) readout subsequently converted to usable units by aid of a digital computer, and (e) locating the electronics and the transducer in a temperature stable environment, underground. The frictionless transducer technique was used in developing a low-displacement type pressure transducer for measuring the water-content of snow. A method was developed for the automatic plotting of isohyetal lines on an analog computer. (WRSIC abstract)