Accession Number : AD0015003


Title :   AAP YAW MEASUREMENTS BY RF SIGNAL FROM XRAT SONDE


Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD


Personal Author(s) : Raff, Samuel J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/015003.pdf


Report Date : 25 Mar 1953


Pagination or Media Count : 20


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.


Descriptors :   *GUIDED MISSILE WARHEADS , *YAW , *RADIOSONDES , HIGH RATE , ACCURACY , FLIGHT , ANTENNAS , AERODYNAMIC CHARACTERISTICS , RECORDING SYSTEMS , CALIBRATION , VISION , HORIZONTAL ORIENTATION , AMPLITUDE , ROTATION , POSITION(LOCATION) , RIGHT ANGLES , ANGLES , MEASUREMENT


Subject Categories : Guided Missile Warheads and Fuzes


Distribution Statement : APPROVED FOR PUBLIC RELEASE