IMPROVEMENT IN ACCURACY OF THE ML-419 RADIOSONDE TEMPERATURE ELEMENT FOR HEIGHTS ABOVE 50,000 FEET AND UP TO 150,000 FEET.
Abstract
The problem of radiosonde temperature measurement is discussed, with particular reference to the U. S. Army ML-419 element, and the study of it by Prof. J. H. Shaw of Ohio State University under a U. S. Army contract. An improved reflective coating is proposed; and a method is presented of correcting for radiation error by use of three sensing elements of different radiation absorptivities, but otherwise identical, and identically exposed to convection and to radiation. The method requires accurate reading of the element temperatures, accurate knowledge of the absorption coefficients, close equality of convection heat transfer characteristics, and close equality of exposure to convection and radiation. Other methods of modifying the ML-419 for increased accuracy of air-temperature measurement are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1965
- Accession Number
- AD0624855
Entities
People
- Ralph W. Armstrong
Organizations
- United States Army Communications-Electronics Command