Accession Number : AD0262928

Title :   ROCKET MEASUREMENT OF A DAYTIME ELECTRON DENSITY PROFILE UP TO 620 KILOMETERS

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : JACKSON,J.E. ; BAUER,S.J.

Report Date : SEP 1961

Pagination or Media Count : 1

Abstract : Also available from NASA, Wash. 25, D. C. as NASA Technical note no. D-413AD-262 928Div. 8, 2U (13 Sep 61) OTS price $.50 National Aeronautics and Space Administration, Washington, D. C. ROCKET MEASUREMENT OF A DAYTIME ELECTRON DENSITY PROFILE UP TO 620 KILOMETERS, by J. E. Jackson and S. J. Bauer. Sep 61, 6p. incl. illus. tables (NASA Technical note no. D-413) Unclassified reportAlso available from NASA, Wash. 25, D. C. as NASA Technical note no. D-413. DESCRIPTORS: *Electrons, *Densit , Measure ment, Rockets, Rocket trajectories, Test methods, Ionosphere, Ionospheric propagation, Radio waves. Open-ended Terms: Doppler effect. On April 27, 1961 at 1502 EST a four-stage research rocket was fired from Wallops Island, Virginia, to measure the ionospheric electron density distribution by means of Seddon's CW propagation technique. This experimental technique is based upon the dispersive Doppler effect measured at two harmonically related frequencies, in this case f = 12.267 Mc and 6f = 73.6 Mc. The electron density profile measured above the peak of the F2 region is representative of a diffusive-equilibrium distribution in an isothermal ionosphere having a temperature of 1640 + or - 90 K. This result, when compared with satellite and other data, indicates that the upper ionosphere is in thermodynamic equilibrium. (Author)

Descriptors :   *DENSITY, *ELECTRONS, DOPPLER RADAR, IONOSPHERE, IONOSPHERIC PROPAGATION, MEASUREMENT, RADIO WAVES, ROCKET TRAJECTORIES, ROCKETS, TEST METHODS

Distribution Statement : APPROVED FOR PUBLIC RELEASE