Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm21a10s&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SM21A-10 INVITED
Physics
2768 Plasmasphere, 6939 Magnetospheric Physics, 6969 Remote Sensing
Scientific paper
The plasmasphere as a target for radio sounding from high altitude differs markedly from expectations prior to the launch of the IMAGE satellite and operation thereon of the Radio Plasma Imager (RPI). Although the RPI team expected to find evidence of density structure in the plasmapause region and outer plasmasphere, it was also expected that on many occasions the echoes would be discrete, with each pulse returning from a single range. Instead the typical echo patterns received at a given point as IMAGE approaches the plasmasphere at low magnetic latitudes exhibit range spreading over distances of up to two R E. However they may also show a well defined minimum range that decreases with approach to the plasmasphere. The echoes appear to reflect large scale features (> 0.1 R E) of the radial electron density profile as well as the presence of smaller scale irregularities. Our work on quantitative modeling of the observed effects will benefit from our ability to compare sounding records taken at multiple points as IMAGE approaches and then penetrates the plasmasphere.
Bell Timothy F.
Benson Robert F.
Carpenter Donald L.
Fung Shing F.
Inan Umran S.
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