This paper uses retrospective cost parameter estimation (RCPE) to estimate parameters in the global ionosphere–thermosphere model (GITM). Using GITM as an executable simulation code, RCPE estimates two thermal-conductivity coefficients along with the temperature exponent in the thermal-conductivity model. These parameter estimates are obtained by using various combinations of simulated measurements of the global minimum, global maximum, and mean neutral density at a fixed altitude. RCPE is implemented within recursive least squares using both constant-rate forgetting and variable-rate forgetting. The goal of this comparison is to assess the effect of variable-rate forgetting on the convergence of the parameter estimates. The contribution of the paper is thus an investigation of the effectiveness of RCPE for parameter estimation in GITM.
Estimation of Thermal-Conductivity Coefficients in the Global Ionosphere–Thermosphere Model
Journal of Aerospace Information Systems ; 17 , 9 ; 546-553
2020-05-08
8 pages
Article (Journal)
Electronic Resource
English
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