High-latitude electrodynamics via assimilation of ionospheric plasma densities
Abstract
The objectives of this proposed effort are to use data assimilation to estimate the high-latitude electric field in a way that is consistent with the conductivity, and to analyze the IT system state that arises from consistent driving. The science question we will address is- Does data assimilation (DA) for estimating the high latitude electric field driver consistently with conductivity improve general circulation model (GCM) specification of the ionosphere-thermosphere (IT) system? Specific tasks to be carried out are- 1. We will prepare DA method Estimating Model Parameters from Ionospheric Reverse Engineering (EMPIRE) to use the thermosphere ionosphere electrodynamic GCM (TIEGCM) outputs as the background model. 2. We will treat the time-varying plasma densities provided from Air Force Research Laboratory (AFRL) DA algorithms and Defense Meteorological Satellite Program (DMSP) ion drift data as observations in the EMPIRE filtering system. 3. We will augment the EMPIRE observation array to use Defense Meteorological Satellite Program (DMSP) ion drift data as additional observations related to the electric potential state. 4. We will run EMPIRE for select storms, one per project year. Outputs will be global electric potential and global horizontal neutral wind. 5. We will provide outputs to collaborators at AFRL. 6. In coordination with collaborators at AFRL, we will analyze the differences in the assimilative fields and winds from the background values, through comparison of a TIEGCM driven by the EMPIRE fields versus TIEGCM with the standard high-latitude field inputs. 7. We will report results at conferences and in publications in the peer-reviewed literature. In seeking to better specify IT drivers, this effort aligns with AFOSR and DoD’s objective of Space Domain Awareness.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Feb 29, 2024
- Source ID
- FA95502310169
Entities
People
- Seebany Datta-barua
Organizations
- Air Force Office of Scientific Research
- Illinois Institute of Technology
- United States Air Force