Accession Number : AD0634775

Title :   AIRCRAFT-INDUCED IONOSPHERIC DISTURBANCES.

Descriptive Note : Air Force surveys in geophysics,

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

Personal Author(s) : Marcos, Frank A.

Report Date : APR 1966

Pagination or Media Count : 34

Abstract : Experiments were conducted to determine whether acoustic waves could propagate from the lower atmosphere into the ionosphere and be detected by hf radio waves. A supersonic aircraft was flown on a trajectory designed to focus the shock wave energy, generated over a long flight path, into a relatively small region of the daytime E-layer which was being probed by a phase path vertical sounder. Three series of tests, consisting of four flights each, were made. In each series, perturbations were found in the frequency spectrum of reflected radio waves that could be well correlated with the expected disturbance from aircraft-generated shock waves. (Author)

Descriptors :   (*ACOUSTICS, *IONOSPHERE), SUPERSONIC AIRCRAFT, SUPERSONIC FLIGHT, SHOCK WAVES, PROPAGATION, IONOSPHERIC DISTURBANCES, ATMOSPHERIC SOUNDING, PROBES, ELECTROMAGNETIC WAVE REFLECTIONS, HIGH FREQUENCY, RADIO WAVES

Subject Categories : Atmospheric Physics
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE