1. NASA Quarterly UVIS Q
(May - July 2008)

2. UVIS: Science Highlights
Matching Enceladus jets seen by UVIS and imaging: Plotted here as a function of UTC are: (1) the altitude above Enceladus' limb of the line-of-sight from Cassini to the star; (2) the attenuation of the HSP signal, scaled by a factor of 300; and (3) the projections of the 8 jets seen by the ISS instrument6 into the plane of the figure. The jets have each, for purposes of illustration, been assigned a length of 50 km. In the labels, the letters A, B, C, and D refer to the "tiger stripes" Alexandria, Baghdad, Cairo, and Damascus, respectively, and the original Roman numerals have been replaced by Arabic. The label C/A marks the closest approach of the line-of-sight to Enceladus. The times and positions at which the line-of-sight intersected the centerlines of the jets are marked by squares. Jet B7 was intersected 35 km from its source on Enceladus' surface; the corresponding distances for jets B6 and C8 were within km, and for the others, within km. Other things (such as jet strength) being equal, the width of the attenuation feature associated with each jet should be proportional, and the magnitude inversely proportional, to this distance.

3. UVIS: Accomplishments
Publications
Published this quarter
In Press (Went into press May-Jul and also includes still in press from earlier quarters) 2
Submitted (Submitted May-Jul and also includes submitted earlier and still in review) 6
Published 2008 to date:
Published Entire mission
Presentations at scientific meetings
2 papers at AGU Joint Assembly in Ft. Lauderdale, FL, May, 2008 (Colwell, Bradley)
4 papers at the COSPAR in Montreal, July 2008 (Colwell, Esposito, Hansen, Pryor)
1 paper at The Science of Solar System Ices workshop in Oxnard, CA, May 2008 (Hendrix)
5 papers at Saturn After Cassini/Huygens workshop in London, July 2008 (Albers, Bradley, Colwell, Esposito, Hendrix & Hansen)
1 paper at Ring Workshop in Paris, France, July 2008
2 papers at EGU in Vienna Austria, April 2008
Public Outreach and Press Activities
4: public talks
0: press releases
0: press conferences

4. UVIS: Plans
Science Plans (Aug - Oct 2008)
Scientific organizer for Cassini Rings Workshop to be held in Paris France, July 24-25, 2008 (Colwell)
Analysis of sharp edges in Saturn’s rings using multiple stellar occultation profiles. (Colwell)
Finish HDAC analysis and find best fitting model parameters to learn something about atomic hydrogen in Titans exosphere (Hedelt)
Close Enceladus flyby in August
Publications (Aug - Oct 2008)
In preparation (includes all papers submitted up to now, but not yet published) 9
1 paper to Nature
1 paper to Icarus
1 paper to Astrophys. J. Suppl.
1 paper to GRL
1 paper submitted to JGR
1 paper submitted to Rev. Geophys
1 paper submitted to Origin of Life and Evolution of Biospheres
1 paper submitted to Astronomy and Astrophysics
1 paper submited to Scholarpedia
Upcoming presentations at scientific meetings (Aug - Oct 2008)
4 papers at European Planetary Science Conference in Muenster Germany, September (Colwell, Hedelt, Esposito, Hansen)
3 papers at DPS in Ithaca New York, October (Colwell, Albers, Hansen)
Public Outreach and Press Activities (Aug - Oct 2008)
0: public talks
0: press releases
0: press conferences

5. Backup Material

6. UVIS: Publications
Aguilar, A., J.M, Ajello, R.S. Mangina, G.K. James, H. Abgrall, E. Roueff The Electron Excited Middle UV to Near IR Spectrum of H2: Cross sections and Transition Probabilities. ApJ. Supp. (Published July 1, 2008)
Ajello J.M., A. Aguilar, R. S. Mangina, G. K. James, P.Geissler, L. Trafton The Middle UV to Near IR Spectrum of Electron Excited SO2. JGR-Planets. (Published March 21, 2008)
Ajello, J, J. Gustin, A.I.F. Stewart, K. Larsen, L.W. Esposito, W. Pryor, W. McClintock, M. H. Stevens, C.P. Malone and D. Dziczek Titan airglow spectra from the Cassini Ultraviolet Imaging Spectrograph: FUV disk analysis. Geophys. Res. Lett. 35, L06102, doi: /2007GL (Published 3/21/08)
Esposito, L.W., B. K. Meinke, J.E. Colwell, P.D. Nicholson, M.M. Hedman Moonlets and Clumps in Saturn’s F Ring. Icarus (Published March 2008)
Hendrix, A.R., C.J. Hansen Ultraviolet Observations of Phoebe from Cassini UVIS. Icarus. (Published Feb. 7, 2008)
Hendrix, A.R., Hansen, C.J The Albedo Dichotomy of Iapetus Measured at UV wavelengths. Icarus. (Published Feb. 7, 2008)
Jones, G. H., E. Roussos, N. Krupp, U. Beckmann, A. J. Coates, F. Crary, I. Dandouras, V. Kikarev, M. K. Dougerty, P. Garnier, C. J. Hansen, A. R. Hendrix, G. B. Hospodarsky, R. E. Johnson, S. Kempf, K. K. Khurana, S. M. Krimigis, H. Krueger, W. S. Kurth, A. Lagg, H. J. McAndrews, D. G. Mitchell, C. Paranicas, F. Postberg, C. T. Russell, J. Saur, M. Seiss, F. Spahn, R. Srama, D. F. Strobel, R. Tokar, J.-E. Wahlund, R. J. Wilson, J. Woch, D. Young The Dust Halo of Saturn’s Largest Icy Moon, Rhea. Science no. 5868, pp doi: /science (published March 7, 2008)
Liu, X., D.E. Shemansky, C.P. Malone, P.V. Johnson, J.M. Ajello, I. Kanik, A.N. Heays, B.R. Lewis, S.T. Gibson and G. Stark Experimental and coupled-channels investigation of the radiative properties of the N2 1Σ–X 1Σ band system. JGR. (Published Feb. 2008)
Parkinson, C.D., M-C.  Liang,  Y. L. Yung, J. L. Kirschivnk “Habitability of Enceladus: Planetary Conditions for Life”. Origin of Life and Planetary Evolution. (As of 7/1, should be published any day)

7. UVIS: Publications (In Press)
Andre, N., M. Blanc, S. Maurice, P. Schippers, E. Pallier, T. I. Gombosi, K. C. Hansen, D. T. Young, F. J. Crary, S. Bolton, E. C. Sittler, H. T. Smith, R. E. Johnson, R. A Baragiola, A. J. Coates, A. M. Rymer, M. K. Dougherty, N. Achilleos, C. S. Arridge, S. M. Krimigis, D. G. Mitchell, N. Krupp, D. C. Hamilton, I. Dandouras, D. A. Gurnett, W. S. Kurth, P. Louarn, R. Srama, S. Kempf, J. H. Waite, L. W. Esposito, J. T. Clarke Magnetospheric Regions and Associated Plasma Processes: Synopsis of Cassini Observations During Orbit Insertion. Rev. Geophys. (Submitted July Accepted June 2008.)
Pryor, W., P. Gangopadhyay, B. Sandel, T. Forrester, E. Quemerais, E. Moebius, L. Esposito, I. Stewart, B. McClintock, A. Jouchoux, J. Colwell, V. Izmodenov, Y. Malama, K. Tobiska, D. Shemansky, J. Ajello, C.Hansen, M. Bzowski and P. Frisch Radiation transport of heliospheric Lyman-alpha from combined Cassini and Voyager data sets. Astronomy and Astrophysics. (Submitted October 16, 2007, went into press as of June 5, 2008)

8. UVIS: Publications (Submitted)
Colwell, J. E., Cooney, J. H., Esposito, L. W., Sremcevic, M Density Waves in Cassini UVIS Stellar Occultatios 1. The Cassini Division. Icarus. (Submitted June 6, 2008).
Glass-Maujean, M., X. Liu and D. E. Shemansky, Analysis of Electron-Impact Excitation and Emission of the npσ 1S and npπ 1Πu Rydberg Series of H2, Astrophys J. Suppl. Ser., (Submitted on April 14, 2008)
Hansen, C. J., Esposito, L.W., Stewart, A.I.F., Meinke, B., Wallis, B., Colwell, J., Hendrix, A.R., Larsen, K., Pryor, W., Tian, F Water Vapor Jets in Enceladus’ Plume. Nature. (Submitted June 3, 2008.)
Howard, J.E "Stability of Hamiltonian Flows" Scholarpedia. (Submitted in October.) No printed copy, just online.
Larsen, K., J.Ajello, J. Gustin, and A.I.F. Stewart “Variability in Titan's Nitrogen Emissions” GRL (to be submitted in July)
Liu, X., A. Heays, D. E. Shemansky, B. R. Lewis and P. D. Feldman, Analysis of terrestrial-thermospheric N2 c 1S(0)~b’1S(1) - X 1S dayglow emission observed by the Far Ultraviolet Spectroscopic Explorer, J. Geophys. Res., (Submitted May 12, 2008)

9. UVIS: Science Presentations - 2008
AGU Joint Assembly in Ft. Lauderdale, FL, May, 2008
Colwell, J. E., Esposito, L. W., Cooney, J. H., Jerousek, R. G., Lissauer, J. J., Stewart, G. R., Sremcevic, M.: Mass and Thickness of the Cassini Division in Saturn’s Rings.
Bradley: Composition and size properties of Saturn's rings determined from ultraviolet measurements made by the Cassini Ultraviolet Imaging Spectrograph
COSPAR in Montreal, July 2008
Colwell: Vertical Structure of Saturn's Rings from Cassini UVIS Stellar Occultations, Colwell, J. E., Esposito, L. W., Jerousek, R., Lissauer, J. J.
Esposito: Structure and history of Saturn’s rings from Cassini-UVIS Observations
Hansen: Exploration of a New World: Saturn's moon Titan
Pryor: Lyman-alpha observations of Comet Holmes from SORCE SOLSTICE and SOHO SWAN, W. Pryor, M. Snow, and E. Quemerais. (re: cross-calibrating UV instruments)
The Science of Solar System Ices workshop in Oxnard, CA, May 2008
Hendrix and Hansen: UV Spectra of the Icy Moons of Jupiter and Saturn.
Saturn After Cassini/Huygens workshop in London, July 2008
Albers, N., Sremcevic, M., Esposito, L.W.: Saturn’s F ring: Observations by Cassini UVIS
Colwell : Ring Structure, Colwell, J. E., French, R. G., Marouf, E. A., Murray, C. D., Nicholson, P. D., Tiscareno, M. S.
Esposito : Structure and history of Saturn’s rings from Cassini-UVIS Observation
Hendrix and Hansen: Ultraviolet Spectroscopy of the Surfaces of the Saturnian Satellites
Ring Workshop, July 2008, Paris, France
Albers.: F ring models
EGU, April 2008, Vienna Austria
Yung: Evolution andOrigin of Titanﾕs Atmosphere
Yung: Habitability of Enceladus:Planetary Conditions for Life

10. UVIS: Outreach - 2008 #: Press releases None
#: Press conferences & interviews
#: EPO: Talks to school children, teachers and public
Esposito: History of Saturn’s Rings, Ball Aerospace, June 27
Esposito: History of Saturn’s Rings, Oulu University, Finland, May 16
Liu: Experimental and coupled-channels investigations of N2 radiative properties for analysis of FUSE day glow observation, Caltech graduate students. June 10.
Hansen: The Discovery of Enceladus’ Water Vapor Plume, California Institute of Technology Alumni Seminar, May, 2008, Pasadena, CA