Search Publications
Modeling of observations of the OH nightglow in the Venusian mesosphere
Bougher, S. W.; Parkinson, C. D.; Yung, Y. L. +4 more
Venus airglow emissions have been unambiguously detected in the wavelength ranges of 1.40-1.49 and 2.6-3.14 µm in limb observations by the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) onboard the Venus Express (VEx) spacecraft and are attributed to the OH(2-0) and OH(1-0) Meinel band transitions. The integrated (limb slant path…
Tropopause and lower stratosphere winds and eddy fluxes on Saturn as seen by Cassini imaging
Del Genio, Anthony D.; Barbara, John M.
An automated cloud feature tracking algorithm is applied to 2004 Cassini Imaging Science Subsystem images of Saturn's southern hemisphere and equatorial region (5°N-70°S) in continuum, methane band, and ultraviolet filters to derive zonal wind profiles and eddy momentum fluxes from the middle troposphere cloud tops to the lower stratosphere. Zonal…
Titan occultations of Orion's belt observed with Cassini/UVIS
Yelle, Roger V.; Koskinen, T. T.; Palmer, M. Y.
On 1 February 2016 Titan occulted the three stars in Orion's belt, as seen from the Casssini spacecraft. The ultraviolet spectrometer on Cassini observed this event with the stars arranged along the instrument's entrance slit. These three stellar occultations probed different latitudes in Titan's northern hemisphere but similar longitudes. The occ…
On the derivation of thermospheric temperatures from dayglow emissions on Mars
González-Galindo, Francisco; López-Valverde, Miguel Ángel; Forget, François +2 more
The Cameron bands and the UV doublet are two of the most prominent emission systems in the UV in Mars dayside. Their altitude variation has been exploited in the past to derive thermospheric temperatures from measurements obtained by the Mariner 6, 7, and 9 missions, the SPICAM instrument on board Mars Express, and the IUVS instrument on board MAV…
Asymmetrical meridional expansion of bright clouds from Saturn's 2010 great white storm
Dowling, Timothy E.; Li, Liming; Creecy, Ellen C. +4 more
Saturn's recurring great white storms play an important role in modifying its atmosphere. In 2010, such a storm with clouds encircling the planet occurred in the northern hemisphere. An interesting phenomenon of this storm is that the associated bright clouds expanded asymmetrically with respect to latitude, such that the southern boundary of the …
Evidence for fluvial and glacial activities within impact craters that excavated into a Noachian volcanic dome on Mars
Harish; Vijayan, S.; Mangold, N.
Impact craters on Mars preserve diverse records of volcanic, fluvial, and glacial activities. Enigmatically, the preservation of these major activities or records altogether within impact craters is rare. We report one such new observation of impact craters that formed on a volcanic dome studied using data from the Mars Reconnaissance Orbiter's (M…
Neptune's HCl upper limit from Herschel/HIFI
Irwin, P. G. J.; Teanby, N. A.; Gould, B.
Here we search for hydrogen chloride (HCl) in Neptune's stratosphere using observations of the 1876.22 GHz J=3-2 transition from the Heterodyne Instrument for the Far-Infrared (HIFI) on Herschel. Observations comprise a 7.2 hr disc-averaged integration, originally designed to investigate stratospheric methane. Significant HCl emission was not dete…
Forbidden atomic oxygen emissions in the Martian dayside upper atmosphere
Bhardwaj, Anil; Jain, Sonal Kumar; Raghuram, Susarla
Recently, Nadir and Occultation for Mars Discovery (NOMAD) ultraviolet and visible spectrometer instrument on board the European Space Agency's ExoMars Trace Gas Orbiter (TGO) simultaneously measured the limb emission intensities for both [OI] 2972 and 5577 Å (green) emissions in the dayside of Martian upper atmosphere. But the atomic oxygen red-d…
Multiscale spectral discrimination of poorly crystalline and intermixed alteration phases using aerial and ground-based ExoMars rover emulator data
Allender, E. J.; Cousins, C. R.; Gunn, M. D. +1 more
A key goal of the ExoMars rover Rosalind Franklin is to analyze accessible hydrated mineral deposits using panoramic multiscale and multispectral imagery. We conducted a multiscale spectroscopic study on hydrothermally-altered basalt-hosted soils in the geothermal area of Námafjall in northern Iceland. Basaltic lavas here that have experienced fir…
Comet 21P/Giacobini-Zinner: Water production activity over 20 years with SOHO/SWAN
Bertaux, J. -L.; Combi, M. R.; Quémerais, E. +3 more
In 1985 Comet 21P/Giacobini-Zinner was the first comet visited by a spacecraft, the International Cometary Explorer (ICE) satellite, several months before the armada of Halley spacecraft had their encounters in 1986. ICE was originally the ISEE-3 satellite, designed for magnetospheric measurements near the Earth, and was diverted via a lunar gravi…