A5008950878- Planetary Science and Exploration
- Astro and Planetary Science
- Space Exploration and Technology
- Space Science and Extraterrestrial Life
- Atmospheric and Environmental Gas Dynamics
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Scientific Research and Discoveries
- Geomagnetism and Paleomagnetism Studies
- Isotope Analysis in Ecology
- Spaceflight effects on biology
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Aeolian processes and effects
- Hydrocarbon exploration and reservoir analysis
- Spacecraft and Cryogenic Technologies
- Species Distribution and Climate Change
- Geological Studies and Exploration
- Atmospheric Ozone and Climate
- Astrophysics and Star Formation Studies
- Calibration and Measurement Techniques
- Space exploration and regulation
- Paleontology and Stratigraphy of Fossils
- Spacecraft Design and Technology
- Solar and Space Plasma Dynamics
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2022-2024
Planet
2024
Laboratory for Atmospheric and Space Physics
2014-2022
University of Colorado Boulder
2014-2022
University of Colorado System
2014-2021
University of Bern
2009-2013
International Space Science Institute
2010
Max Planck Institute for Solar System Research
2009
Max Planck Society
2009
Jet Propulsion Laboratory
2009
To date dynamical observations of the Venus clouds have delivered mainly either only short‐term or long‐term averaged results. With Monitoring Camera (VMC) it finally became possible to investigate global dynamics with a relatively high resolution in space and time on basis. Our findings from manual cloud feature wind tracking VMC UV image sequences so far show that details mesospheric appear be highly variable. Although general rotation atmosphere remained stable since Mariner 10, more than...
We report on an initial analysis of Herschel/HIFI observations hydrogen chloride (HCl), peroxide (H_2O_2), and molecular oxygen (O_2) in the Martian atmosphere performed 13 16 April 2010 (L_s ~ 77{\deg}). derived a constant volume mixing ratio 1400 +/- 120 ppm for O_2 determined upper limits 200 ppt HCl 2 ppb H_2O_2. Radiative transfer model calculations indicate that vertical profile may not be constant. Photochemical models determine lowest values H_2O_2 to around L_s 75{\deg} but...
We report on the initial analysis of a <i>Herschel<i/>-PACS full range spectrum Neptune, covering 51–220 <i>μ<i/>m with mean resolving power ~3000, and complemented by dedicated observation CH<sub>4<sub/> at 120 <i>μ<i/>m. Numerous spectral features due to HD (R(0) R(1)), H<sub>2<sub/>O, CH<sub>4<sub/>, CO are present, but so far no new species have been found. Our results indicate that (i) Neptune's thermal profile is warmer ~3 K than inferred from <i>Voyager<i/> radio-occultation; (ii) D/H...
Observations acquired at ultraviolet wavelengths are uniquely well-suited to investigate the composition and structure of Enceladus' plume. This paper describes observations, analysis techniques results all Enceladus occultations observed by Cassini's Ultraviolet Imaging Spectrograph (UVIS) other observations designed study Limits on gas non-polar latitudes derived. Constraints minor constituents' primarily water vapor plume evaluated. The overall source rate variability over a time span 13...
Many discoveries of active surface processes on Mars have been made due to the availability repeat high-resolution images from High Resolution Imaging Science Experiment (HiRISE) onboard Reconnaissance Orbiter. HiRISE stereo are used make digital terrain models (DTMs) and orthorectified (orthoimages). DTMs orthoimage time series crucial for advancing study such as recurring slope lineae, dune migration, gully activity, polar processes. We describe process making DTMs, series, DTM mosaics,...
Abstract Reliable and accurate environmental sensing is a cornerstone of modern meteorology. This paper presents laboratory simulator capable reproducing extreme environments performing tests calibrations meteorological sensor systems under controlled conditions. facility available to the research community as well industry intended encourage advancement in field metrology applied meteorology climatology. Discussion will be made temperature, pressure, humidity wind flow control, with...
[1] We use data from the High Resolution Imaging Science Experiment (HiRISE) camera and Compact Reconnaissance Spectrometer for Mars (CRISM) imaging spectrometer onboard Orbiter to follow evolution of appearance composition 12 regions south polar layered deposits spring summer time. distinguish three steps in volatile layer: a decrease both CO2 band strength albedo until Ls = 190°–210°, significant increase 240°–260° finally rapid complete defrosting ground. In contrast, water ice displays...
In this paper, we use morphological and numerical methods to test the hypothesis that seasonally formed fracture patterns in Martian polar regions result from brittle failure of seasonal CO 2 slab ice. The observations by High Resolution Imaging Science Experiment (HiRISE) Mars show very narrow dark elongated linear are observed during some periods time spring, disappear summer re‐appear again following spring. They repeatedly same areas but they do not repeat exact pattern year year. This...
Abstract An occultation of ε Orionis by Enceladus' plume was observed with Enceladus at an orbital longitude near apoapsis in order to investigate whether water vapor flow is modulated diurnally, similar ice particles. The showed that the bulk emanating from changes little position. amount gas least one supersonic jet increased significantly, implying increase number particles lofted could be due more coming jets and not overall flux tiger stripe fissures cross south polar region.
On day 138 of 2010, the plume dust and gas emerging from Enceladus' South Polar Terrain passed between Sun Cassini spacecraft. This solar occultation enabled Cassini's Ultraviolet Imaging Spectrograph (UVIS) Visual Infrared Mapping Spectrometer (VIMS) to obtain simultaneous measurements plume's components along same lines sight. The UVIS content are described in Hansen et al. (2011, GRL 38:11202) , while this paper describes VIMS data information they provide about particle content....