Accession Number:

AD0596285

Title:

Radio Interference Due to Rocket Exhaust Jets: The Measurement and Computer Modelling of Amplitude and Phase Noise Spectra

Descriptive Note:

Technical rept.

Corporate Author:

ROCKET PROPULSION ESTABLISHMENT WESCOTT (UNITED KINGDOM)

Personal Author(s):

Report Date:

1971-11-01

Pagination or Media Count:

50.0

Abstract:

A full description is given of a computer model developed to describe amplitude and phase noise spectra generated by incoherent volume scattering in the turbulent ionised exhaust jet. The experimental method and equipment are described in detail and, by choice of a computer model for the jet velocity and density structure, a comparison is made between the measured and the computed noise power spectrum density functions. The agreement is excellent for the particular moderately ionised jet selected. Velocity turbulence is not found to be significant in establishing the noise spectrum. The radial and longitudinal gradients in the steady mean local velocity within the jet adequately predict the observed spectrum function.

Subject Categories:

  • Computer Programming and Software
  • Radiofrequency Wave Propagation
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE