Analysis of Ionospheric Parameters Based on DMSP SSIES Data Using the DBASE4 andNADIA Programs

摘要

This report covers further upgrades and extensions of the previously submittedDBASE4 analysis program which uses DMSP/SSIES data to derive an electrostatic potential distribution in the polar ionosphere and attempt to match it to one of the three standard Heppner-Maynard distribution patterns. These results form part of the input for the operational Magnetospheric Specification Model being run by 50th Air Weather. This report uses archived data to evaluate the performance of the existing code and documents the changes which were made to improve it. It also uses archived interplanetary magnetic field data (IMF) to compare the identified pattern with the actual IMF orientation in order to evaluate the quality of the output based only on the three Heppner-Maynard models. As the solar cycle reached its minimum in 1995-1996, the changes in the ionospheric densities and compositions were reflected by changes in quality of the data from the SSIES instrument. A major revision in the analysis algorithms was written and tested to insure that a majority of the polar passes could still be used for the MSM analysis. This revised version of DBASE4 is called Nominal / Anomalous (passes) Database for Ionospheric Analysis (NADIA) and its design and performance are described in this report.