Accession Number:

ADA254478

Title:

Angle of Arrival Fluctuations for Millimeter Waves Propagating in a Turbulent Atmosphere Near the Earth

Descriptive Note:

Final rept. Jan-May 1992

Corporate Author:

INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA

Personal Author(s):

Report Date:

1992-06-01

Pagination or Media Count:

27.0

Abstract:

This document is concerned with the effect of atmospheric turbulence on the tracking error of a millimeter wave radar transmitting over a propagation path near the ground, as in the case of one used for the guidance of a direct- fire, surface-to-surface, anti-tank missile. The objective is to estimate the likely angle-of-arrival error, and, based on general theory and specific experimental results found in the literature, to assess the reliability of the estimate. The document discusses the appropriateness and limitations of the Rytov approximation used by V.I. Tatarsky and others for theoretical calculations relevant to the error estimate. It also discusses the applicability of certain data obtain by the National Oceanic and Atmospheric Administration and the Georgia Institute of Technology in a measurement program at Flatville, Illinois. The primary conclusion is that the angle-of-arrival error will probably be significant. A program to perform measurements in a greater variety of environmental conditions than those encountered at Flatville and to include direct angle-of-arrival measurements is recommended.

Subject Categories:

  • Atmospheric Physics
  • Guided Missile Trajectories, Accuracy and Ballistics
  • Air Navigation and Guidance

Distribution Statement:

APPROVED FOR PUBLIC RELEASE