Search Publications
Sizes of the smallest particles at Saturn's ring edges
Colwell, Joshua E.; Esposito, Larry W.; Becker, Tracy M. +1 more
The Ultraviolet Imaging Spectrograph (UVIS) on the Cassini spacecraft observed 275 ring stellar occultations from July 2004 until August 2017. We use stellar occultation data from the UVIS High Speed Photometer (HSP) to characterize the smallest particles at ring edges by modeling observed diffraction signatures. We identify these signatures as sp…
Constraining the surface properties of Helene
Royer, E.; Howett, C. J. A.
We analyze two sets of observations of Dione's co-orbital satellite Helene taken by Cassini's Composite Infrared Spectrometer (CIRS). The first observation was a CIRS FP3 (600 to 1100 cm-1, 9.1 to 16.7 µm) stare of Helene's trailing hemisphere, where two of the ten FP3 pixels were filled. The daytime surface temperatures derived f…
Characterizing southern portion of Mare Vaporum with improved Chandrayaan-1 M3 data
Videen, Gorden; Shkuratov, Yuriy; Surkov, Yehor +3 more
We investigate a southern portion of Mare Vaporum using Chandrayaan-1 M3 images for which we suppress striped noise. Additional data processing allows us to analyze such spectral parameters as the depths and positions of the absorption bands near 1 and 2 µm. Mineral types were mapped using the cluster analysis of Adams diagram for…
Venus night-side photometry with "cleaned" Akatsuki/IR2 data: Aerosol properties and variations of carbon monoxide
Sato, Takao M.; Satoh, Takehiko; Horinouchi, Takeshi +2 more
We have developed a novel method called Restoration by Simple Subtraction (RSS) to clean and restore the Venus night-side disk in "contaminated" Akatsuki/IR2 images at 2.26 and 1.735 µm. Light spread from the intense day crescent is cancelled by subtracting a near-simultaneous 2.32-µm image (scaled) from a 2.26-µm image. Net-cont…
Martian roughness analogues of Europan terrains for radar sounder investigations
Gerekos, Christopher; Grima, Cyril; Steinbrügge, Gregor +5 more
Understanding the implications of Europa's roughness on backscattered radar signals is central to ensure that the future radar sounding instruments heading for the Jovian icy moons, the Radar for Icy Moons Exploration (RIME) and the Radar for Europa Assessment and Sounding: Ocean to Near-surface (REASON), will yield fruitful observations over thei…
Light-toned deposit in the northeastern Hellas basin formed by terrain-conforming airfall sedimentation
Wilson, S. A.; Howard, A. D.; Morgan, A. M. +2 more
Extensive exposures of a light-toned deposit (LTD) occurs on the northeastern interior slope of the Hellas basin. This deposit is on the floors of all but the youngest craters greater than 30 km in diameter in the study region centered at 83°E and 30°S, as well as in exposures on crater interior and exterior walls, on intercrater plains, and the n…
Water production rates from SOHO/SWAN observations of six comets: 2017-2020
Bertaux, J. -L.; Combi, M. R.; Shou, Y. +4 more
The Solar Wind ANisotropies (SWAN) all-sky hydrogen Lyman-alpha camera on the SOlar and Heliosphere Observer (SOHO) satellite makes daily images of the entire sky to monitor the three-dimensional distribution of solar wind and solar radiation via its imprint on the stream of interstellar hydrogen that flows through the solar system. In the process…
The Faraday rotation effect in Saturn Kilometric Radiation observed by the CASSINI spacecraft
Lamy, Laurent; Fischer, Georg; Kurth, William S. +7 more
Non-thermal radio emissions from Saturn, known as Saturn Kilometric Radiation (SKR), are analyzed for the Faraday rotation effect detected in Cassini RPWS High Frequency Receiver (HFR) observations. This phenomenon, which mainly affects the lower-frequency part of SKR below 200 kHz, is characterized by a rotation of the semi-major axis of the SKR …
Revisiting magnetospheric CAPS TOF data post Cassini
Wilson, R. J.; Reisenfeld, D. B.; Allen, R. C. +2 more
The Cassini Plasma Spectrometer has a Time-of-Flight sensor capable of separating out the major magnetospheric ions at Saturn of protons, ions with a mass to charge of 2 amu/q, and water group ions (O+, OH+, H2O+ and H3O+), yet until this study a survey of their relative proportions…
Corrigendum to "Photometrically-corrected global infrared mosaics of Enceladus: New implications for its spectral diversity and geological activity" [Icarus 349 (2020) 113848]
Le Mouélic, S.; Rodriguez, S.; Sotin, C. +4 more
The authors regret that the longitude grid in Figures. 9 and 11 was wrongly shifted by 180° in the original manuscript. We provide below the correct versions of Figures. 9 and 11.