Accession Number : AD0762191

Title :   Winter Anomalous Radio Wave Absorption Days at 32 Degrees N Latitude and Prevalent Solar Radiation.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Rubio,Roberto

Report Date : MAY 1973

Pagination or Media Count : 26

Abstract : BER 1970, January 1971, and February 1971 and used to detect the anomaly are reported here. A criterion to identify anomalous high absorption days is defined and subsequently used in conjunction with the A-1 measurements to establish the occurrence of 11 winter anomalous days. Zurich sunspot numbers and solar flux input at 8.8 GHz and 15.4 GHz are used as solar activity indicators. Days with at least one standard deviation more than the computed three months solar flux and/or sunspot average are classified as solar active days. The earth's daily maximum magnetic field intensity is also reported and used to identify geomagnetically active days. Of the 11 anomalous absorption days detected at 32 degrees N latitude, five were found to occur on days of enhanced solar radiation, while the other six anomalous days occurred on quiet solar days. (Author)

Descriptors :   (*IONOSPHERIC PROPAGATION, ABSORPTION), MAGNETIC STORMS, RADIO WAVES, RADIOFREQUENCY INTERFERENCE, SOLAR DISTURBANCES, CORRELATION TECHNIQUES, ANOMALIES

Subject Categories : Atmospheric Physics
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE