Accession Number : AD0609862

Title :   A COLLATION STUDY OF A HIGHLY MAGNETIC PERIOD (SEPTEMBER 20-23, 1963).

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Silverman,Herbert M. ; Ramsey,Barbara A.

Report Date : DEC 1964

Pagination or Media Count : 36

Abstract : There was considerable solar activity during the month of September, which reached a peak on September 20. On September 21 - 22, there were three magnetic dis turbances, the last two being of extremely high intensity with the KFr reaching a value of 9. A noticeable increase was seen in the scintillation rate, the scintillation index, and the Faraday fading rate of the signal received from 1961 Omicron I. During Revolution 11314, the Faraday fading rate was the fastest ever recorded at the Sagamore Hill Radio Observatory. The effect of the irregularity structure in the ionosphere on the satellite signal during the highly disturbed magnetic conditions has been thoroughly investigated. A 10 Mc total power receiver showed the highest absorption level ever recorded by this equipment when a change of 21 db from the normal level was seen. Variations in the level of absorption on a 30 Mc riometer corresponded very closely with the progress of the various magnetic disturbances. An ionosonde evinced a marked change in the ionospheric structure with the spreading in the F layer being of an extreme nature. Magnetometer records were in excellent agreement with the records from the various pieces of equipment. Data from a 19 Mc auroral radar provided evidence of a southward movement of the irregularity structure in the ionosphere during this period of interest. (Author)

Descriptors :   (*GEOMAGNETISM, SOLAR DISTURBANCES), (*SOLAR DISTURBANCES, GEOMAGNETISM), (*RADIO ASTRONOMY, SOLAR DISTURBANCES), (*EXTRATERRESTRIAL RADIO WAVES, GEOMAGNETISM), SOLAR FLARES, SUNSPOTS, SOLAR RADIATION, COSMIC RAYS, COSMIC RAYS, MAGNETIC STORMS, IONOSPHERE, IONOSPHERIC DISTURBANCES, UPPER ATMOSPHERE, MAGNETOMETERS, AURORAE, RADAR, ASTRONOMY

Distribution Statement : APPROVED FOR PUBLIC RELEASE