Accession Number : AD0735898

Title :   An Experimental Method of Determining Ballistic Winds Making Direct Use of SIRS Radiances.

Descriptive Note : Final rept. Jul-Dec 71,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Elsberry,Russell L. ; Wright,John W. ; Martin,Frank L.

Report Date : 31 DEC 1971

Pagination or Media Count : 48

Abstract : A proposed ballistic wind determination technique using the satellite infrared spectrophotometer (SIRS) data from NIMBUS 3 and 4 was tested. The general approach was to derive regression equations from a dependent data sample of nearly coincident subsatellite points and rawinsonde locations. The validity of the equations was checked with a smaller independent sample of SIRS radiances from a later period. Tests with the ballistic wind component normal to the path of the NIMBUS 3 suggested standard errors of less than 10 kts can be achieved. Both zonal and meridional components can be calculated from SIRS-B radiance data which is grouped in clusters. Because the geostrophic ballistic wind is proportional to a horizontal gradient, several techniques were attempted for calculating the gradient at the central point of the irregularly spaced set of data. (Author)

Descriptors :   (*WIND, UPPER ATMOSPHERE), (*GUIDED MISSILE TRAJECTORIES, DEFLECTION), ATMOSPHERE ENTRY, REGRESSION ANALYSIS, METEOROLOGICAL SATELLITES, INFRARED SPECTROPHOTOMETERS, RADIOSONDES, CORIOLIS EFFECT, GRAVITY

Subject Categories : Atmospheric Physics
      Guided Missile Traj, Accuracy and Ballistics
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE