Accession Number : AD0631502

Title :   BALLOON ASCENT TRAJECTORY DISPERSION OVER THE UNITED STATES AT 60,000 FT AND 100,000 FT.

Descriptive Note : Air Force Surveys in geophysics,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Nolan,George F.

Report Date : FEB 1966

Pagination or Media Count : 33

Abstract : A series of seasonal statistical charts is presented which can be used for obtaining estimates of ascent trajectory dispersion at altitudes of 60,000 ft and 100,000 ft for balloons launched from locations within the United States. The charts give isopleth mappings of mean ascent trajectory components, angle of rotation of axes of the dispersion patterns, and standard deviations of the components along the major and minor distribution axes. The chart data and outlined procedures furnish the means for constructing balloon ascent trajectory dispersion patterns, with a minimum amount of time and effort for any specified constant balloon ascent rate and for any desired degree of probability. These dispersion patterns provide useful planning information for purposes of air safety and other operational considerations. An analysis of the stability of the mean ascent trajectories shows a wave pattern distribution over the United States with a ridge of maximum stability, or minimum dispersion, centered along longitude 110 degrees and troughs of minimum stability, or maximum dispersion, located over the Northeast and over the Northwest. (Author)

Descriptors :   (*BALLOONS, *ASCENT TRAJECTORIES), FLIGHT PATHS, MISSION PROFILES, CLIMATE, METEOROLOGICAL PHENOMENA, CORRELATION TECHNIQUES, ATMOSPHERIC SOUNDING, METEOROLOGICAL CHARTS

Subject Categories : Aerodynamics
      Lighter-than-air Aircraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE