Titan's ionosphere: Model comparisons with Cassini Ta data

T. E. Cravens, I. P. Robertson, J. Clark, J. E. Wahlund, Jr H. Waite, S. A. Ledvina, H. B. Niemann, Roger Yelle, W. T. Kasprzak, J. G. Luhmann, R. L. McNutt, W. H. Ip, V. De La Haye, I. Müller-Wodarg, D. T. Young, A. J. Coates

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Abstract

On October 26, 2004, during its first encounter with Titan (Ta), the Cassini Orbiter moved from the dayside to the nightside with a closest approach altitude of 1174 km. In situ measurements of the main part of Titan's ionosphere were made by the Langmuir probe on the Cassini Radio and Plasma Wave Experiment (RPWS), while the Ion and Neutral Mass Spectrometer (INMS) measured the main constituents of the neutral atmosphere. The results of model calculations of Titan's ionosphere for Ta encounter conditions (e.g., near the terminator) are presented in this paper. The paper includes comparisons of calculated and measured electron densities along the spacecraft track. Ionization both by solar radiation and by incoming energetic electrons from Saturn's magnetosphere are needed to obtain good agreement between the measured and calculated electron densities.

Original languageEnglish (US)
Pages (from-to)1-5
Number of pages5
JournalGeophysical Research Letters
Volume32
Issue number12
DOIs
StatePublished - Jun 28 2005

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Titan
ionospheres
ionosphere
encounters
electron density
neutral atmospheres
radio waves
Saturn
electrostatic probes
plasma waves
solar radiation
in situ measurement
magnetospheres
mass spectrometers
magnetosphere
spacecraft
ionization
spectrometer
energetics
probe

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Cravens, T. E., Robertson, I. P., Clark, J., Wahlund, J. E., Waite, J. H., Ledvina, S. A., ... Coates, A. J. (2005). Titan's ionosphere: Model comparisons with Cassini Ta data. Geophysical Research Letters, 32(12), 1-5. https://doi.org/10.1029/2005GL023249

Titan's ionosphere : Model comparisons with Cassini Ta data. / Cravens, T. E.; Robertson, I. P.; Clark, J.; Wahlund, J. E.; Waite, Jr H.; Ledvina, S. A.; Niemann, H. B.; Yelle, Roger; Kasprzak, W. T.; Luhmann, J. G.; McNutt, R. L.; Ip, W. H.; De La Haye, V.; Müller-Wodarg, I.; Young, D. T.; Coates, A. J.

In: Geophysical Research Letters, Vol. 32, No. 12, 28.06.2005, p. 1-5.

Research output: Contribution to journalArticle

Cravens, TE, Robertson, IP, Clark, J, Wahlund, JE, Waite, JH, Ledvina, SA, Niemann, HB, Yelle, R, Kasprzak, WT, Luhmann, JG, McNutt, RL, Ip, WH, De La Haye, V, Müller-Wodarg, I, Young, DT & Coates, AJ 2005, 'Titan's ionosphere: Model comparisons with Cassini Ta data', Geophysical Research Letters, vol. 32, no. 12, pp. 1-5. https://doi.org/10.1029/2005GL023249
Cravens TE, Robertson IP, Clark J, Wahlund JE, Waite JH, Ledvina SA et al. Titan's ionosphere: Model comparisons with Cassini Ta data. Geophysical Research Letters. 2005 Jun 28;32(12):1-5. https://doi.org/10.1029/2005GL023249
Cravens, T. E. ; Robertson, I. P. ; Clark, J. ; Wahlund, J. E. ; Waite, Jr H. ; Ledvina, S. A. ; Niemann, H. B. ; Yelle, Roger ; Kasprzak, W. T. ; Luhmann, J. G. ; McNutt, R. L. ; Ip, W. H. ; De La Haye, V. ; Müller-Wodarg, I. ; Young, D. T. ; Coates, A. J. / Titan's ionosphere : Model comparisons with Cassini Ta data. In: Geophysical Research Letters. 2005 ; Vol. 32, No. 12. pp. 1-5.
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