A review of gas-surface interaction models for orbital aerodynamics applications

S Livadiotti, NH Crisp, PCE Roberts, SD Worrall… - Progress in Aerospace …, 2020 - Elsevier
Abstract Renewed interest in Very Low Earth Orbits (VLEO)-ie altitudes below 450 km-has
led to an increased demand for accurate environment characterisation and aerodynamic …

[HTML][HTML] Satellite drag coefficient modeling for thermosphere science and mission operations

PM Mehta, SN Paul, NH Crisp, PL Sheridan… - Advances in Space …, 2023 - Elsevier
Satellite drag modeling remains the largest source of uncertainty affecting space operations
in low Earth orbit. The uncertainty stems from inaccurate models for mass density and drag …

New density estimates derived using accelerometers on board the CHAMP and GRACE satellites

PM Mehta, AC Walker, EK Sutton… - Space Weather, 2017 - Wiley Online Library
Atmospheric mass density estimates derived from accelerometers onboard satellites such as
CHAllenging Minisatellite Payload (CHAMP) and Gravity Recovery and Climate Experiment …

In-orbit aerodynamic coefficient measurements using SOAR (Satellite for Orbital Aerodynamics Research)

NH Crisp, PCE Roberts, S Livadiotti, AM Rojas… - Acta Astronautica, 2021 - Elsevier
Abstract The Satellite for Orbital Aerodynamics Research (SOAR) is a CubeSat mission, due
to be launched in 2021, to investigate the interaction between different materials and the …

[HTML][HTML] Uncertainty quantification techniques for data-driven space weather modeling: thermospheric density application

RJ Licata, PM Mehta - Scientific Reports, 2022 - nature.com
Abstract Machine learning (ML) has been applied to space weather problems with
increasing frequency in recent years, driven by an influx of in-situ measurements and a …

High-fidelity geometry models for improving the consistency of CHAMP, GRACE, GOCE and Swarm thermospheric density data sets

G March, EN Doornbos, P Visser - Advances in Space Research, 2019 - Elsevier
During the last two decades, accelerometers on board of the CHAMP, GRACE, GOCE and
Swarm satellites have provided high-resolution thermosphere density data to improve our …

Gas-surface interactions modelling influence on satellite aerodynamics and thermosphere mass density

G March, J Van Den Ijssel, C Siemes… - Journal of Space …, 2021 - swsc-journal.org
The satellite acceleration data from the CHAMP, GRACE, GOCE, and Swarm missions
provide detailed information on the thermosphere density over the last two decades. Recent …

ADBSat: Methodology of a novel panel method tool for aerodynamic analysis of satellites

LA Sinpetru, NH Crisp, D Mostaza-Prieto… - Computer Physics …, 2022 - Elsevier
ADBSat is a novel software that determines the aerodynamic properties of any body in free-
molecular flow. Its main advantage is the fast approximation of the aerodynamics of …

Qualitative and quantitative assessment of the SET HASDM database

RJ Licata, PM Mehta, WK Tobiska, BR Bowman… - Space …, 2021 - Wiley Online Library
Abstract The High Accuracy Satellite Drag Model (HASDM) is the operational thermospheric
density model used by the US Space Force Combined Space Operations Center. By using …

Comparing physical drag coefficients computed using different gas–surface interaction models

PM Mehta, A Walker, CA McLaughlin… - Journal of Spacecraft and …, 2014 - arc.aiaa.org
Drag coefficient is a major source of uncertainty in calculating the aerodynamic forces on
satellites in low Earth orbit. Closed-form solutions are available for simple geometries under …