H. Michaelis
A5043067941- Astro and Planetary Science
- Planetary Science and Exploration
- Spacecraft Design and Technology
- Space Exploration and Technology
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Spacecraft and Cryogenic Technologies
- CCD and CMOS Imaging Sensors
- Space Satellite Systems and Control
- Astronomy and Astrophysical Research
- Infrared Target Detection Methodologies
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Isotope Analysis in Ecology
- Satellite Image Processing and Photogrammetry
- Solar and Space Plasma Dynamics
- Nuclear Physics and Applications
- Gamma-ray bursts and supernovae
- Geology and Paleoclimatology Research
- Space exploration and regulation
- Geophysics and Gravity Measurements
- Space Science and Extraterrestrial Life
- Medical Imaging Techniques and Applications
- Advanced Optical Sensing Technologies
- Robotics and Sensor-Based Localization
Planet
1998-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2024
Planetary Science Institute
2014-2016
Polish Academy of Sciences
1998
Daimler (Germany)
1997
TU Bergakademie Freiberg
1992
University of Cape Town
1968-1969
The amplitude of the extended x-ray-absorption fine structure concentrated samples measured in fluorescence mode (FLEXAFS) as well overall shape fluorescence-yield spectra strongly depend on detection geometry through self-absorption effect. In these cases, a conventional EXAFS analysis can lead to systematic errors determination physical parameters. We studied distortions FLEXAFS effect measuring NiO single crystal above oxygen K edge for various geometries. show that knowing stoichiometry...
Landing on the surface of Ryugu In October 2018, Hayabusa2 spacecraft dropped Mobile Asteroid Surface Scout (MASCOT) lander onto asteroid (162173) Ryugu. Jaumann et al. analyzed images taken by MASCOT camera during its descent and when resting surface. Colored light-emitting diodes were used to illuminate lander's surroundings at night produce color images. Ryugu's is dominated two types rock, but there no evidence for fine-grained dust. Millimeter-sized inclusions in rocks are similar those...
The structure of the upper layer a comet is product its surface activity. Rosetta Lander Imaging System (ROLIS) on board Philae acquired close-range images Agilkia site during descent onto 67P/Churyumov-Gerasimenko. These reveal photometrically uniform covered by regolith composed debris and blocks ranging in size from centimeters to 5 meters. At highest resolution 1 centimeter per pixel, appears granular, with no apparent deposits unresolved sand-sized particles. thickness varies across...
The detection of a super-Earth and three mini-Neptunes transiting the bright ($V$ = 9.2 mag) star HD 108236 (also known as TOI-1233) was recently reported on basis TESS ground-based light curves. We perform first characterisation planetary system through high-precision CHEOPS photometry improve transit ephemerides parameters. characterise host spectroscopic analysis derive radius with infrared flux method. constrain stellar mass age by combining results obtained from two sets evolutionary...
The recently approved ExoMars rover is the first element of ESA Aurora programme and scheduled to deliver Pasteur exobiology payload Mars by 2015. 0.7 kg Panoramic Camera will provide multi-spectral stereo images with 65 ° field-of-view (1.1 mrad/pixel) high-resolution (85 μrad/pixel) monoscopic ‘zoom’ 5 field-of-view. wide-angle cameras (WAC) are based on Beagle 2 Stereo System heritage (Griffiths et al . (2005). Planet. Space Sci 53 , 1466–1488). instrument designed fulfil digital terrain...
The CHaracterising ExOPlanet Satellite (CHEOPS) was selected in 2012, as the first small mission ESA Science Programme and successfully launched December 2019. CHEOPS is a partnership between Switzerland with important contributions by ten additional Member States. dedicated to search for transits of exoplanets using ultrahigh precision photometry on bright stars already known host planets. As follow-up mission, mainly improving, whenever possible, existing radii measurements or provide...
Abstract The BepiColombo Laser Altimeter (BELA) is the first European laser altimeter constructed for interplanetary flight. BELA uses a 50 mJ pulsed Nd:YAG operating at 10 Hz with 20 cm aperture receiver to perform ranging. instrument also digital approach range detection and pulse analysis. ranging accuracy expected be better than 2 metres ∼20 in optimum conditions. With given, only slightly elliptical, orbit, should return consistent data set most if not all of planet. required function...
By using the images acquired by OSIRIS (Optical, Spectroscopic and Infrared Remote Imaging System) ROLIS (ROsetta Lander cameras, we derive size-frequency distribution ( ...
The space-qualified design of a miniaturized laser for pulsed operation at wavelength 1064 nm and repetition rates up to 10 Hz is presented. This consists pair diode-laser pumped, actively q-switched Nd:YAG rod oscillators hermetically sealed encapsulated in an environment dry synthetic air. system delivers least 300 million pulses with 50 mJ energy 5 ns pulse width (FWHM). It will be launched 2017 aboard European Space Agency's Mercury Planetary Orbiter as part the BepiColombo Laser...
The CHEOPS space mission dedicated to exoplanet follow-up was launched in December 2019, equipped with the capacity perform photometric measurements at 20 ppm level. As carries out its observations a broad optical passband, it can provide insights into reflected light from exoplanets and constrain short-wavelength thermal emission for hottest of planets by observing occultations phase curves. Here, we report first observation an occultation, namely, that hot Jupiter WASP-189b, $M_P \approx 2...