Mathematics – Logic
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusmsa51a..13g&link_type=abstract
American Geophysical Union, Spring Meeting 2004, abstract #SA51A-13
Mathematics
Logic
2411 Electric Fields (2712), 2415 Equatorial Ionosphere, 2439 Ionospheric Irregularities, 2447 Modeling And Forecasting
Scientific paper
We have extended our equatorial plasma bubble (EPB) studies by comparing evening sector plasma densities from four polar-orbiting satellites of the Defense Meteorological Satellite Program (DMSP) with measurements from the Republic of China Satellite (ROCSAT) in a 35° inclination orbit. Observations of individual EPBs detected by both ROCSAT and DMSP during March and April of 2000 were well correlated when satellite orbital paths crossed the same longitude within ±15 minutes. After determining basic criteria for detecting plasma density depletions in the 1-second ROCSAT data, we compiled a statistical database of EPB occurrence rates for March and April of 2000 and 2002 for comparison with the DMSP EPB database for 1989-2002. Despite the fact that the ROCSAT orbital period and inclination limit the time the satellite is in an appropriate location to observe EPBs, three significant results were noted. (1) The rate of ROCSAT EPB encounters at topside altitudes rose rapidly after 19:00 MLT and peaked between 20:00 and 22:00 MLT close to the orbital planes of DMSP F12, F14, and F15. (2) EPB occurrence rates have Gaussian distributions centered at the magnetic equator with a half-width of approximately 8° . (3) The longitude distributions of EPB detections by ROCSAT and DMSP were qualitatively similar. These results indicate substantial agreement between ROCSAT and DMSP observations and provide new insights on EPB phenomenology.
Burke William J.
Gentile Louise C.
Huang Chang-Yin
Su Shin-Yi
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