AAP YAW MEASUREMENTS BY RF SIGNAL FROM XRAT SONDE

Abstract

A method of yaw analysis was developed for analyzing the flight characteristics of full-scale Angled Arrow Projectiles (AAP). The XRAT sonde indicates the rotational position of the missile and consists essentially of an electric dipole along the missile axis and a magnetic dipole at right angles to the axis. The signal received by a vertical antenna from the electric dipole is independent of the rotational position of the missile about the axis, and varies approximately as the sine of the viewing angle. The signal received by the same antenna from the loop varies sinusoidally as the sonde rotates. This method of analysis gives a very accurate measurement of the vertical component of yaw for a viewing angle less than 7 deg., when coupled with relative amplitude calibration of the receiver and recording mechanism. The body-to-loop field- strength ratio and phase can also be determined to a high degree of accuracy. The horizontal component of yaw can be obtained by using a horizontal antenna.

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Document Details

Document Type
Technical Report
Publication Date
Mar 25, 1953
Accession Number
AD0015003

Entities

People

  • Samuel J. Raff

Organizations

  • Naval Ordnance Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Calibration
  • Dipoles
  • Frequency
  • Gun Launched
  • Line Of Sight
  • Magnetic Dipoles
  • Measurement
  • Military Research
  • Munitions
  • National Security
  • Ordnance Laboratories
  • Orientation (Direction)
  • Physics Laboratories
  • Security
  • Trajectories

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Radar Systems Engineering.
  • ballistics.