Publications
Journal & Conference Papers
Brownhall, I., Lifson, M., Hall, S., Constant, C., Lavezzi, G., Ziebart, M., Linares, R., Bhattarai, S. MOCAT-pySSEM: An open-source Python library and user interface for orbital debris and source-sink environmental modeling. SoftwareX, Vol. 30, 102062, 2025. DOI
Peto-Madew, F., Bhattarai, S., Constant, C., Brownhall, I. Investigating the Application of the Orbit Domain Calibration Method in Sun Synchronous Orbits. Proceedings of the 9th European Conference on Space Debris, ESA Space Debris Office, April 2025. PDF
Bhattarai, S., Peto-Madew, F., Constant, C. Toward an On-Orbit Reference Network for Enhanced Ephemeris Quality Testing in Low Earth Orbit. The Advanced Maui Optical and Space Surveillance (AMOS) Technologies Conference, 2025.
Constant, C., Mutschler, S.M., Bhattarai, S., Pilinski, M. Bring the Noise: Three Rules for Improving Thermospheric Density Retrieval From LEO POD Data. The Advanced Maui Optical and Space Surveillance (AMOS) Technologies Conference, 2025.
Constant, C., Bhattarai, S., Brownhall, I., Aruliah, A., Ziebart, M. Evaluating Near-Real-Time Thermospheric Density Retrieval Methods from Precise Low Earth Orbit Spacecraft Ephemerides During Geomagnetic Storms. arXiv preprint arXiv:2408.16805, 2024. arXiv
Constant, C., Hanson, B., Brownhall, I., Bhattarai, S., Ziebart, M. An Evaluation of Physics-Based Force Model Performance in LEO: Implications for Next-Generation Space Traffic Management. 45th COSPAR Scientific Assembly, July 2024. NASA ADS
Constant, C., Bhattarai, S., Ziebart, M. Limitations of Current Practices in Uncooperative Space Surveillance: Analysis of Mega-Constellation Data Time-Series. Proceedings of the AMOS Conference, 2023. Abstract
Conference Talks & Posters
Constant, C., Brownhall, I., Aguilar, L., Dable, E., Ziebart, M., Aruliah, A., Bhattarai, S. Thermospheric Response and Operational Impacts During the 2024 “Mother’s Day” Geomagnetic Storm. European Space Weather Week, 2024. Poster
Constant, C., Hanson, B., Brownhall, I., Bhattarai, S., Ziebart, M. An Evaluation of Physics-Based Force Model Performance in LEO: Implications for Next-Generation Space Traffic Management. COSPAR, 2024. Interactive Presentation
Bhattarai, S., Brownhall, I., Constant, C., Peto-Madew, F., Rotheram, E. Orbit Domain Calibration for Space Surveillance & Tracking (ODC4SST): Design Concept, Network Selection & Initial Validation Tests. COSPAR, 2024.
Brownhall, I., Lifson, M., Hall, S., Constant, C., Lavezzi, G., Ziebart, M., Linares, R., Bhattarai, S. MOCAT-PYSSEM: An Open-Source Python Library and User Interface for Orbital Debris and Source-Sink Environmental Modelling. COSPAR, 2024. ResearchGate
Constant, C., Bhattarai, S., Ziebart, M. Limitations of Current Practices in Uncooperative Space Surveillance: Analysis of Mega-Constellation Data Time-Series. AMOS, 2023. Poster • Video
Constant, C., Bhattarai, S., Brownhall, I., Ziebart, M. Astrodynamics and Space Geodesy for Space Domain Awareness and Sustainability. GNOSIS, 2022. Poster