CEDAR email: CEDAR 2024 session: Advances in Ionospheric and Thermospheric Data Assimilation

[Hughes, Joseph (Orion)]

Hello to all Data Assimilation enthusiasts! We welcome and encourage you to take place in the 'Advances in Ionospheric and Thermospheric Data Assimilation session at CEDAR 2024 on Monday from 4 to 6 pm.

This workshop focuses on data assimilation, which is the art and science of combining imperfect and sparse measurements with incomplete models to estimate the most likely state of the system. There is a spectrum of methods that trade accuracy, complexity, and computational effort for understandability. The ionosphere and thermosphere are tightly coupled and both affect critical technologies for our space-faring society. The thermosphere perturbs the orbits of all Low Earth Orbit (LEO) satellites through drag. Drag is the most variable aspect of LEO orbit prediction, so better understanding the thermosphere results in better predicting LEO orbits. This is crucial since LEO is becoming crowded with controlled spacecraft as well as debris which could collide and make LEO unusable. The ionosphere is also highly variable and can harm satellites and signals that pass through it. The ionosphere also enables technologies like High Frequency (HF) communications and Over The Horizon (OTH) radar which both refract signals off the ionosphere that return to earth much farther away than would be possible for line-of-sight communications.
For both domains, it is crucial to hindcast, nowcast, and forecast the state of the system. This is done by combining both novel and established measurements and models. Typically, there is not enough data to specify the system at all places and all times. Assimilation can fill these gaps by adjusting global models to best fit the available measurements. Assimilation can also use parameterized representations of the system to reduce the state space.
Since assimilation is vital to our continued utilization and exploration of space, it is also vital to coordinate efforts for continued study within the CEDAR community. We will provide a forum for such discussion as part of the overall workshop agenda.

Learn more here: https://cedarscience.org/workshop/2024-workshop-advances-data-assimilation

Anyone interested in presenting should contact Joe Hughes (joe.hughes at arcfield.com<mailto:joe.hughes at arcfield.com>), Thanks!

JOE HUGHES
Senior Scientist


M: 909.810.8797
joe.hughes at arcfield.com

[Logo, company name  Description automatically generated]<https://www.orion.arcfield.com/>




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