Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34114
Title: | Estimating atmospheric density profiles using orbit determination with a focus on JUICE and Cassini | Authors: | Hickey, A. Durante, D. Iess, L. Plainaki, C. MILILLO, Anna MURA, Alessandro |
Issue Date: | 2019 | Volume: | AIAC18: 18th Australian International Aerospace Congress (2019): HUMS - 11th Defence Science and Technology (DST) International Conference on Health and Usage Monitoring (HUMS 2019): ISSFD - 27th International Symposium on Space Flight Dynamics (ISSFD) | First Page: | 995 | Abstract: | Orbit determination allows us to determine a spacecraft’s position, velocity, and dynamical model parameters that directly affect a spacecraft’s trajectory, such as gravity field coefficients, which relate to the interior structure of a planetary body, and tidal forces. In addition, when a spacecraft experiences substantial drag in the presence of an exosphere/atmosphere, the density profile may be estimated. This work presents an analysis of two cases where atmospheric drag has effects on the orbit and gravity measurements in planetary missions: Cassini, the mission to Saturn’s system which ended with a plunge into the planet in 2017, and JUICE, the future mission to Jupiter’s icy moons which will include an insertion into a circular, polar orbit around Ganymede. For Saturn, we have estimated a vertical atmospheric density profile which we have compared with in-situ measurements taken by Cassini’s INMS (Ion and Neutral Mass Spectrometer). For Ganymede, we find that the exosphere may be dense enough to affect JUICE’s trajectory around the moon. | Conference Name: | 18th Australian Aerospace Congress | Conference Place: | Melbourne (Australia) | Conference Date: | 24-28 February 2019 | URI: | http://hdl.handle.net/20.500.12386/34114 | URL: | https://issfd.org/ISSFD_2019/ISSFD_2019_AIAC18_Hickey-Anne.pdf https://search.informit.org/doi/book/10.3316/informit.9781925627213 |
Fulltext: | reserved |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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Hickey_etal_ISSFD 2019.pdf | [Administrators only] | 876.9 kB | Adobe PDF |
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