ExPRES Jovian Radio Emission Simulations Dataset v21

• DOI: 10.25935/txka-y235
• Publisher: PADC
• License: CC-BY 4.0
• Citation: Louis, C., B. Cecconi, Aicardi, S. & A. Loh (2026). ExPRES Jovian Radio Emission Simulations Dataset (Version 21) [Dataset]. PADC. https://doi.org/10.25935/txka-y235

This collection is a new version of:

• Louis, C., B. Cecconi & A. Loh (2023). ExPRES Jovian Radio Emission Simulations Dataset (Version 11) [Dataset]. PADC. https://doi.org/10.25935/y0f3-9n63

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Description

The data files are provided in CDF format, and the ExPRES input files are JSON files. They are named as follow:
expres_{observer}_jupiter_{source}_txka-y235_{YYYYMMHH}_v14

The precomputed observers and associated time ranges are:

• Earth (1977-01-01 to 2050-12-31)
• Juno (2016-01-01 to 2028-12-31)

The precomputed sources are:

• Jupiter-Io
• Jupiter-Europa
• Jupiter-Ganymede

This dataset contains pre-computed ExPRES simulation runs, with the following input parameters:

• Jovian Magnetic Field Model: JRM33 (Connerney et al, 2021)
• Jovian Current Sheet Model: Connerney et al (2020)
• CMI Mechanism: Loss Cone, with a 1° sheet thickness
• The magnetospheric plasma density is defined using two density model (see Eqs. (1) and (2) in Louis et al., 2017):
  • Jovian ionosphere (Hinson et al., 1998):
    • Ionospheric peak: 650 km
    • Electron peak density: 350,000 cm^-3
    • Scale height: 1600 km
  • Io torus (Bagenal, 1994):
    • Density at the center of the torus: 2000 cm^-3
    • Torus center located at 422517.72 km
    • Scale heigt: 71492 km
• Electron energy: 3 keV
• Lead angle model: Hue et al. (2023)
• Refraction effects: True

The altitude of the Jovian aurora is set to 650 km (this constrains the maximum value of fc).

The data files contain the modelled following parameters: polarization, theta, CML (obs longitude), obs latitude, obs distance, srcfreqmax, srcfreqmaxCMI, srcLongitude,fp and fc (detailed informations are available in Louis et al., 2019).

ExPRES v1.4.1 was used to create this dataset (Louis et al., 2026).

References

• Bagenal, F. (1994). Empirical model of the Io plasma torus: Voyager measurements, Journal of Geophysical Research, vol. 99, no. A6, Wiley, pp. 11043–11062. doi: 10.1029/93JA02908
• Connerney, J. E. P., Timmins, S., Oliversen, R. J., Espley, J. R., Joergensen, J. L., Kotsiaros, S., et al. (2022). A new model of Jupiter’s magnetic field at the completion of Juno’s Prime Mission. Journal of Geophysical Research: Planets, 127, e2021JE007055. doi: 10.1029/2021JE007055
• Connerney, J. E. P., Timmins, S., Herceg, M., & Joergensen, J. L. (2020). A Jovian magnetodisc model for the Juno era. Journal of Geophysical Research: Space Physics, 125, e2020JA028138. doi: 10.1029/2020JA028138
• Hinson, D. P., Twicken, J. D., and Karayel, E. T. (1998). Jupiter’s ionosphere: New results from Voyager 2 radio occultation measurements, Journal of Geophysical Research, vol. 103, no. A5, Wiley, pp. 9505–9520. doi: 10.1029/97JA03689
• Hue, V., Gladstone, G. R., Louis, C. K., Greathouse, T. K., Bonfond, B., Szalay, J. R., et al. (2023). The Io, Europa, and Ganymede auroral footprints at Jupiter in the ultraviolet: Positions and equatorial lead angles. Journal of Geophysical Research: Space Physics, 128, e2023JA031363. doi: 10.1029/2023JA031363
• Louis, C K, S L G Hess, B Cecconi, P Zarka, L Lamy, S Aicardi, and A Loh. 2019. “ExPRES: an Exoplanetary and Planetary Radio Emissions Simulator.” Astronomy and Astrophysics 627 (May): A30. doi: 10.1051/0004-6361/201935161.
• Louis, C. K., Hess, S. L. G., Cecconi, B., Zarka, P., Lamy, L., Aicardi, S., & Loh, A. 2026. "maserlib/ExPRES: Version 1.4.0 (1.4.0)". Zenodo. doi: 10.5281/zenodo.18633066