Abstract: The METRAC? positioning system is a ground-based radio location system that makes use of the Doppler principle in order to track an inexpensive, expendable transmitter. A prototype system has recently been built and evaluated ...

Abstract: A series of objective specification experiments are performed with monthly 700 mb heights and surface station temperatures for the United States during 1947?80. The errors in these specifications are used in conjunction ...

Abstract: A climatology of high-altitude cloud encounters using data obtained between 1975 and 1979 from commercial airliners participating in the Global Atmospheric Sampling Program (GASP) is presented. The statistics are based on ...