Determination of Daytime Midlatitude Electron Density Profiles from Limited Real Time Measurements,
BOSTON COLL CHESTNUT HILL MA INST FOR SPACE RESEARCH
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This paper addresses the problem of determining accurate, real time ionospheric electron density profiles EDP using a limited set of satellite or ground-based measurements. This is done by using real-time data to constrain the geophysical parameters that appear in an ab initio theoretical daytime midlatitude ionospheric model, creating what we call a data constrained-EDP model. The algorithm developed to perform this fitting is quite general and can be used with a variety of real-time data. With the appropriate data, the method can determine not only EDP but various other geophysical parameters e.g. neutral composition, neutral winds. In earlier work, we have tested this approach using ionosonde data, radar data and UV airglow data. In this presentation we consider the use of satellite in-situ plasma measurements. In February to October 1989, a series of coincident measurements were made by the Millstone Hill incoherent scatter radar and the thermal plasma monitors SSIES on the F8 and F9 DMSP satellites. These observations of electron density profiles radar measurements and in-situ total ion density SSIES measurements give us an excellent opportunity to further test the constrained model and the potential of using SSIES measurements to help in specifying the EDP. We discuss the analysis of this data set as well as the use of other types of real-time data.
- Atmospheric Physics