Accession Number : AD0742523

Title :   DNA Project 617 Radar: First Auroral-Zone Results.

Descriptive Note : Final rept. Jul-Nov 71,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : Baron,Murray J. ; Watt,Theodore M. ; Rino,Charles L. ; Petriceks,Juris

Report Date : DEC 1971

Pagination or Media Count : 159

Abstract : The report describes the ionospheric studies performed between July and November 1971 using the DNA Project 617 incoherent-scatter radar. The diurnal and (to some extent) seasonal behavior of the auroral ionosphere has been studied using 24-hour continuous data. Measurements on the auroral E-layer have shown densities as high as 1.8 x 10 to the 12th power el/cc. Other characteristics of the auroral E layer that have been studied include its thickness, electron-density gradient, production rate, and recombination coefficient. Velocity measurements have been made that show the normal as well as disturbed behavior. Ionization drift velocities as high as 200 m/s have been measured. The latitudinal distribution of ionization over several degrees of magnetic latitude has been observed and on several occasions the position of the northern boundary of the plasma trough has been determined. Also described are cooperative experiments in progress with satellites, the Homer multifrequency auroral radar, and various auroral-zone geophysical measurement programs. (Author)

Descriptors :   (*ATMOSPHERIC SOUNDING, IONOSPHERE), (*AURORAE, RADAR REFLECTIONS), IONOSPHERIC DISTURBANCES, RADAR EQUIPMENT, RADAR CLUTTER, ELECTRON DENSITY, THICKNESS, IONIZATION, DIURNAL VARIATIONS, POWER SPECTRA, ATMOSPHERIC MOTION, ALASKA

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE