Physics
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa11b..08c&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA11B-08
Physics
2415 Equatorial Ionosphere, 2427 Ionosphere/Atmosphere Interactions (0335), 2439 Ionospheric Irregularities, 7944 Ionospheric Effects On Radio Waves
Scientific paper
The Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) uses the Tiny Ionospheric Photometer (TIP) to characterize the nighttime ionosphere. TIP is a compact, nadir directed, narrow-band, ultraviolet photometer operating at the 135.6 nm wavelength. This emission is produced by recombination of oxygen ions and electrons, which is the natural decay process for the ionosphere. At night, the strength of the emission is proportional to the square of the peak electron density. TIP measures the horizontal structure of the ionosphere with 15-30 km resolution and high sensitivity, providing remarkable detail even during solar minimum conditions. Multiple TIP sensors are used to map the global pattern of the post-sunset equatorial anomaly for individual days. For solar minimum conditions and equinox periods a 4-cell pattern is observed in the equatorial anomaly. The persistence of the global pattern from day to day is investigated. Daily variations in the pattern are examined and discussed. At solar minimum these variations impact the severity of low latitude radio scintillation by dictating the background density where irregularities form.
Budzien Scott A.
Chua Damien H.
Coker Clayton
Dymond Ken F.
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