Estimation of Venus' atmospheric density through EnVision precise orbit determination Article Swipe
Anna Maria Gargiulo
,
Antonio Genova
,
Flavio Petricca
,
Edoardo Del Vecchio
,
Simone Andolfo
,
Tommaso Torrini
,
P. Rosenblatt
,
S. Lebonnois
,
Jean‐Charles Marty
,
Caroline Dumoulin
·
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.5194/egusphere-egu24-13314
YOU?
·
· 2024
· Open Access
·
· DOI: https://doi.org/10.5194/egusphere-egu24-13314
EnVision radio science investigation will deepen our understanding of Venus’ gravity, interior structure and atmospheric properties. To address these scientific questions, a two-way link communication (configuration X/X/Ka-band) is established with the ESA ESTRACK ground stations enabling precise orbit determination (POD) during the science phase. An accurate modeling of the spacecraft’s dynamics, including the atmospheric drag acceleration, is key for retrieving EnVision’s trajectory and constraining Venus’ gravity field, tides and orientation parameters.Dedicated radio occultation campaigns are designed to characterize electron density profiles in the ionosphere and atmospheric density, pressure and temperature in the mesosphere and upper troposphere of Venus. Furthermore, an accurate POD of the spacecraft also provides complementary information on the atmospheric density at the altitudes crossed by the probe, extending the science return of the EnVision mission.The atmospheric drag perturbation strongly affects spacecraft trajectories that are characterized by a pericenter altitude above Venus’ surface of less than 220 km. By accounting for different Venus’ atmospheric models, e.g., the Venus Climate Database (VCD) and the Venus Global Reference Atmospheric Model (Venus-GRAM), we investigate the impact of potential errors and uncertainties in the predicted atmospheric properties on the orbit evolution of the spacecraft. We note significant inconsistencies between Venus’ atmospheric models at the spacecraft altitudes including atmospheric density differences of more than 200%. These discrepancies may be representative of the current knowledge of Venus’ upper atmosphere and thermosphere. Thus, we carried out a perturbative analysis of the dynamical forces by introducing a mismodeling in the atmospheric density profiles. We assumed the VCD for the simulation of the radio tracking measurements and we included as a priori model in the estimation process the Venus-GRAM. By developing a batch sequential filter that adjusts a set of atmospheric density scale factors, we compensated for the mismodeling and improved the quality of the dynamical model and of the orbit determination. The proposed approach enables an estimation of the atmospheric density at the spacecraft altitudes with an accuracy of 25% and accuracies in the orbit reconstruction of 1-2 m, 30-40 m and 20-30 m in the radial, transverse and normal directions.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- https://doi.org/10.5194/egusphere-egu24-13314
- OA Status
- gold
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4392753869
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4392753869Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.5194/egusphere-egu24-13314Digital Object Identifier
- Title
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Estimation of Venus' atmospheric density through EnVision precise orbit determinationWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
- Publication year
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2024Year of publication
- Publication date
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2024-03-09Full publication date if available
- Authors
-
Anna Maria Gargiulo, Antonio Genova, Flavio Petricca, Edoardo Del Vecchio, Simone Andolfo, Tommaso Torrini, P. Rosenblatt, S. Lebonnois, Jean‐Charles Marty, Caroline DumoulinList of authors in order
- Landing page
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https://doi.org/10.5194/egusphere-egu24-13314Publisher landing page
- Open access
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YesWhether a free full text is available
- OA status
-
goldOpen access status per OpenAlex
- OA URL
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https://doi.org/10.5194/egusphere-egu24-13314Direct OA link when available
- Concepts
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Venus, Astrobiology, Remote sensing, Orbit (dynamics), Orbit determination, Environmental science, Geodesy, Astronomy, Physics, Geology, Aerospace engineering, Satellite, EngineeringTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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