Accession Number : AD0294700

Title :   FIELD-ALIGNED IRREGULARITIES IN THE ES REGION

Corporate Author : QUEENSLAND UNIV BRISBANE (AUSTRALIA)

Personal Author(s) : GOODWIN,G.L. ; THOMAS,J.A.

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : A comparison of the known diurnal and seasonal behavior of constant height (E sub sc) AND SEQUENTIAL (E sub ss) sporadic-E echoes with that of field-aligned (E sub d) echoes from the E-region indicated that an increase in occurrence of E sub d echoes generally coincided with an increase in occurrence and/or range spreading of E sub sc echoes, but was independent of the presence of E sub ss echoes. A detailed comparison indicated that at night in October and in day- and night-time in December almost all E sub sc clouds detected at frequencies at least down to 2.5 Mc/s have irregularities which are field-aligned. (Author)

Descriptors :   *ECHO RANGING, *FREQUENCY, DIURNAL VARIATIONS, IONOSPHERIC DISTURBANCES, RADIO WAVES, GEOMAGNETISM

Distribution Statement : APPROVED FOR PUBLIC RELEASE