Space Science at ASTRA

Geoff Crowley

Atmospheric & Space Technology Research Associates

www.astraspace.net

Simulation Data Assimilation

Data Analysis Instrumentation

Space Science at ASTRA

Simulation: ASPEN-TIMEGCM, ASPEN-Mars

Data Assimilation: IDA4D

Data Analysis: •Satellite Data (TIMED/GUVI, GRACE, CHAMP)•Ground-based (ISRs, TIDDBIT, etc)

Instrumentation:•TIDDBIT HF Doppler Radar System•GUVITO - miniaturized GUVI (with APL)•CASES - GPS dual frequency receiver (with Cornell)

April 20, 2023

IDA4D: Ionospheric Research IDA4D: Ionospheric Research Through Data AssimilationThrough Data Assimilation

3DVAR Objective Analysis Method (Meteorology)

Well Validated - Based on 15 Years of 2D-3D Tomographic Research

Designed for Adaptation and Configuration Based on Science Problem

Designed to Easily Add New Data Sources, Models, Methods

Non-linear iterative estimator – Solves for log of density -

positive solutions– Allows for non-linear data

sources – 1356 EUV currently ingested

and being tested

IDA3DData

Model

UserConfig

Scan operation of the GUVI instrument on TIMED. The slit dimension is along the satellite track and is subdivided into 14 pixels. The cross-track scan is initiated every 15 s.

Nightside Observations: Nightside Observations: February 2, 2002February 2, 2002

Can the TIME-GCM (or any model) Predict This?

9-Day Waves In GUVI Composition9-Day Waves In GUVI Composition

Latitudes -90 to +90°