Persistence in the Average Occurrence Pattern of Monthly/Seasonal/Longitudinal Distribution of Ionospheric Density Irregularities for Past Three Decades

Details Persistence in the Average Occurrence Pattern of Monthly/Seasonal/Longitudinal Distribution of Ionospheric Density Irregularities for Past Three Decades Persistence in the Average Occurrence Pattern of Monthly/Seasonal/Longitudinal Distribution of Ionospheric Density Irregularities for Past Three Decades

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa53b1374s&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA53B-1374

Physics

2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2481 Topside Ionosphere

Scientific paper

Comparing the 5½-year ROCSAT-1 data taken from 1999 to 2004 with the published results on ionospheric irregularity distribution from old data, we have learned the characteristics of persistence in the average occurrence morphology of ionospheric density irregularities. First, longitudes of the highest irregularity occurrences in the four seasons of a year are all located within 30 degrees around the prime meridian. No significant change is noticed for the seasonal/longitudinal distribution in past 25 years between the AE-E observations [McClure et al., 1998] and the current ROCSAT data. Second, persistence in the longitudinal distribution of monthly/seasonal occurrence pattern is also found for past three decades when the ROCSAT data is compared with the scintillation data in the 1970s [Tsunoda, 1985; Aarons, 1993]. Using the large dataset from ROCSAT observations, we can reproduce almost all the monthly occurrence distribution of ground scintillation records taken at any station. The persistence in the average occurrence pattern of density irregularities should help us understand better the physics and the cause of irregularity occurrences.

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