Search Publications
Emission profiles of neutral oxygen and sulfur in Io's exospheric corona
Feldman, P. D.; Moos, H. W.; Strobel, D. F. +4 more
Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph (STIS) observations of Io acquired in 1997 [Roesler et al., 1999] provided the first simultaneous spatially resolved measurements of emission from neutral sulfur and oxygen, the dominant atomic species in Io's exospheric corona. Previous measurements of Io's corona relied primarily …
Hubble Space Telescope observations of the Martian aphelion cloud belt prior to the Pathfinder mission: Seasonal and interannual variations
Wolff, Michael J.; James, Philip B.; Lee, Steven W. +1 more
The presence of a globally extant equatorial belt of water ice clouds on Mars is quantitatively investigated using data from three seasons of our Hubble Space Telescope synoptic monitoring program (1993-1997). A subset of the 1996-1997 images covers the landing site of the Mars Pathfinder including a set of images taken after touchdown. Using mult…
Spectrophotometry of Saturn's small satellites and rings from Hubble Space Telescope images
Sicardy, Bruno; Poulet, François; Karoschka, Erich
We investigate the photometric properties of four of Saturn's inner satellites (Prometheus, Pandora, Janus, and Epimetheus) and five ring regions (the A, B, and C rings; the Cassini division; and the F ring). We have used Hubble Space Telescope images taken in July 1991 and during the Saturn's ring plane crossings by the Earth (August 1995) and th…
New models of Jupiter's magnetic field constrained by the Io flux tube footprint
Connerney, J. E. P.; Satoh, T.; Acuña, M. H. +1 more
Spherical harmonic models of the planetary magnetic field of Jupiter are obtained from in situ magnetic field measurements and remote observations of the position of the foot of the Io flux tube in Jupiter's ionosphere. The Io flux tube (IFT) footprint locates the ionospheric footprint of field lines traced from Io's orbital radial distance in the…
Hubble Space Telescope imaging of Jupiter's UV aurora during the Galileo orbiter mission
Gérard, Jean-Claude; Clarke, John T.; Ben Jaffel, Lotfi
Hubble Space Telescope (HST) Wide-Field Planetary Camera 2 (WFPC 2) images of Jupiter's aurora have been obtained close in time with Galileo ultraviolet spectrometer (UVS) spectra and in situ particles, fields, and plasma wave measurements between June 1996 and July 1997, overlapping Galileo orbits G1, G2, G7, G8, and C9. This paper presents HST i…
Detailed study of FUV Jovian auroral features with the post-COSTAR HST faint object camera
Prangé, Renée; Rego, Daniel; Pallier, Laurent +3 more
A set of Hubble Space Telescope faint object camera images taken in the H2 bands near 1550 Å is used to infer the morphological properties of the steady state Jovian FUV aurorae. We focus on issues best addressed using the excellent spatial resolution available after correction of the spherical aberration, i.e., those related to high la…
Characteristics of the Galileo probe entry site from Earth-based remote sensing observations
Baines, Kevin H.; Hora, Joseph; Hinkley, Sasha +14 more
A reassessment of ground-based observations confirms to better than a 98% confidence level that the Galileo probe entered a 5-µm hot spot, a region of unusual clarity and dryness, some 900+/-300km north of its southern boundary. Cloud conditions at that point were similar to those in the center of this region, some 600 km further north. At t…
OH in Saturn's magnetosphere: Observations and implications
Richardson, J. D.; McGrath, M. A.; Eviatar, A. +1 more
The discovery of OH in Saturn's inner magnetosphere changed our view of this region from one where plasma dominated the physics to one where neutrals are dominant. We revisit Hubble Space Telescope observations of OH and derive revised OH brightnesses for observations in 1992, 1994, and 1995. These OH observations as well as Voyager observations a…
Saturn's hydrogen aurora: Wide field and planetary camera 2 imaging from the Hubble Space Telescope
Krist, John E.; Holtzman, Jon A.; Trauger, John T. +8 more
Wide field and planetary camera 2/Hubble Space Telescope (WFPC2/HST) images of Saturn's far ultraviolet aurora reveal emissions confined to a narrow band of latitudes near Saturn's north and south poles. The aurorae are most prominent in the morning sector with patterns that appear fixed in local time. The geographic distribution and vertical exte…
Mars surface mineralogy from Hubble Space Telescope imaging during 1994-1995: Observations, calibration, and initial results
Bell, James F.; Wolff, Michael J.; Clancy, R. Todd +3 more
Visible to near-infrared observations of Mars were made with the Hubble Space Telescope (HST) during 1994-1995 with the goals of monitoring seasonal variability of the surface and atmosphere and mapping specific spectral units to constrain the planet's surface mineralogy. This paper presents the details of the collection and calibration of the dat…