A5000099226- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Atmospheric chemistry and aerosols
- Calibration and Measurement Techniques
- Spectroscopy and Laser Applications
- Ionosphere and magnetosphere dynamics
- Meteorological Phenomena and Simulations
- Infrared Target Detection Methodologies
- Geophysics and Gravity Measurements
- Atmospheric aerosols and clouds
- Nuclear Physics and Applications
- Spacecraft and Cryogenic Technologies
- Climate variability and models
- Solar and Space Plasma Dynamics
- Vibration and Dynamic Analysis
- Oceanographic and Atmospheric Processes
- Geochemistry and Geologic Mapping
- GNSS positioning and interference
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Aerospace Engineering and Energy Systems
- Satellite Image Processing and Photogrammetry
- Isotope Analysis in Ecology
- Arctic and Antarctic ice dynamics
- Scientific Measurement and Uncertainty Evaluation
Karlsruhe Institute of Technology
2015-2024
FZI Research Center for Information Technology
2002-2008
Ludwig-Maximilians-Universität München
2004
Abstract. MIPAS, the Michelson Interferometer for Passive Atmospheric Sounding, is a mid-infrared emission spectrometer which part of core payload ENVISAT. It limb sounder, i.e. it scans across horizon detecting atmospheric spectral radiances are inverted to vertical temperature, trace species and cloud distributions. These data can be used scientific investigations in various research fields including dynamics chemistry altitude region between upper troposphere lower thermosphere. The...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an imaging limb emission sounder operating in thermal infrared region. It designed to provide measurements upper troposphere/lower stratosphere with high spatial and spectral resolution. instrument consists Fourier transform spectrometer integrated into a gimbal. assembly can be mounted belly pod German High Altitude Long Range research aircraft (HALO) bays Russian M55 Geophysica. Measurements are made...
Abstract. Remote sensing of atmospheric state variables typically relies on the inverse solution radiative transfer equation. An adequately characterized retrieval provides information uncertainties estimated as well how any constraint or a priori assumption affects estimate. Reported characterization data should be intercomparable between different instruments, empirically validatable, grid-independent, usable without detailed knowledge instrument technique, traceable and still have...
MIPAS-B2 is a balloon-borne limb-emission sounder for atmospheric research. The heart of the instrument Fourier spectrometer that covers mid-infrared spectral range (4–14 μm) and operates at cryogenic temperatures. Essential this application sophisticated line-of-sight stabilization system, which based on an inertial navigation system supplemented with additional star reference system. major scientific benefit simultaneous detection complete trace gas families in stratosphere without...
Abstract. Global distributions of profiles sulphur hexafluoride (SF6) have been retrieved from limb emission spectra recorded by the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on Envisat covering period September 2002 to March 2004. Individual SF6 a precision 0.5 pptv below 25 km altitude and vertical resolution 4–6 up 35 altitude. These data validated versus in situ observations obtained during balloon flights cryogenic whole-air sampler. For tropical troposphere...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an imaging Fourier transform spectrometer that capable operating on various high-altitude research aircraft. It measures atmospheric emission in thermal infrared spectral region limb and nadir geometry. GLORIA consists a classical Michelson interferometer combined with camera. detector has usable area 128 × pixels, measuring up to 16 384 interferograms simultaneously. spectrometers impose number...
Polar stratospheric clouds (PSCs) were observed by the high resolution mid infrared Michelson Interferometer for Passive Atmospheric Sounding, Balloon borne version (MIPAS‐B), on a flight from Kiruna/Sweden January 11, 2001. Highly resolved spectral features in limb measurements could only be explained tropospheric radiation scattered into line of sight large PSC particles. Furthermore, model calculations showed that PSCs with particles radius ≥1 μm, significant part broadband continuum...
Abstract. This paper gives an overview of the MIPAS Level 1B (L1B) processor whose main objective is to calibrate atmospheric measurements radiometrically, spectrally and geo-located. It presents also results instrument characterization done on ground during first years in-flight. An accurate calibration mandatory for high quality retrievals. has shown very good performance stability. The noise equivalent spectral radiance ranges from 3 50 nW/(cm2 sr cm−1) well within requirements over...
Abstract. Altitude profiles of ClONO2 retrieved with the IMK (Institut für Meteorologie und Klimaforschung) science-oriented data processor from MIPAS/Envisat (Michelson Interferometer for Passive Atmospheric Sounding on Envisat) mid-infrared limb emission measurements between July 2002 and March 2004 have been validated by comparison balloon-borne (Mark IV, FIRS2, MIPAS-B), airborne (MIPAS-STR), ground-based (Spitsbergen, Thule, Kiruna, Harestua, Jungfraujoch, Izaña, Wollongong, Lauder),...
Abstract. The three-dimensional quantification of small-scale processes in the upper troposphere and lower stratosphere is one challenges current atmospheric research requires development new measurement strategies. This work presents first results from newly developed Gimballed Limb Observer for Radiance Imaging Atmosphere (GLORIA) obtained during ESSenCe (ESa Sounder Campaign) TACTS/ESMVal (TACTS: Transport composition troposphere/lowermost stratosphere, ESMVal: Earth System Model...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is an airborne infrared limb imager combining a two-dimensional detector with Fourier transform spectrometer. It was operated aboard new German Gulfstream G550 High Altitude LOng Range (HALO) research aircraft during Transport And Composition in upper Troposphere/lowermost Stratosphere (TACTS) and Earth System Model Validation (ESMVAL) campaigns summer 2012. This paper describes retrieval temperature trace...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) was operated on board German High Altitude and Long Range Research Aircraft (HALO) during PGS (POLSTRACC/GW-LCYCLE/SALSA) aircraft campaigns in Arctic winter 2015/2016. flights were conducted from 17 December 2015 until 18 March 2016 within 25–87∘ N, 80∘ W–30∘ E. From GLORIA infrared limb-emission measurements, two-dimensional cross sections temperature, HNO3, O3, ClONO2, H2O CFC-12 are retrieved. During 15...
Abstract. A new global set of atmospheric temperature profiles is retrieved from recalibrated radiance spectra recorded with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS). Changes respect to previous data versions include a radiometric calibration considering time dependency detector nonlinearity and more robust frequency scheme. Temperature using smoothing constraint, while tangent altitude pointing information constrained optimal estimation. ECMWF ERA-Interim used...
Abstract. The winter 2009/2010 was characterized by a strong Arctic vortex with extremely cold mid-winter temperatures in the lower stratosphere associated an intense activation of reactive chlorine compounds (ClOx) from reservoir species. Stratospheric limb emission spectra were recorded during flight balloon version Michelson Interferometer for Passive Atmospheric Sounding (MIPAS-B) Kiruna (Sweden) on 24 January 2010 inside vortex. Several fast sequences (in time steps about 10 min)...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a prototype an imaging Fourier Transform Spectrometer (FTS) PREMIER, former candidate mission ESA's Earth Explorer 7. GLORIA deployed on board various research aircraft such as Russian M55 Geophysica or German HALO. instrument provides detailed infrared images Upper Troposphere/Lower Stratosphere (UTLS) region, which plays crucial role in climate system. uses two-dimensional detector array limb...
Abstract. The Gimballed Limb Observer for Radiance Imaging of the Atmosphere (GLORIA) is a limb-imaging Fourier-Transform Spectrometer (iFTS) providing high-resolution mid-infrared spectra in 780–1400 cm-1 wavenumber range. Originally designed aircraft, GLORIA has been deployed eight research campaigns to date. To extend its observational range from middle troposphere stratosphere, instrument was adapted stratospheric balloon platform. GLORIA-B completed first flight Kiruna (Sweden) August...
Abstract. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) is a Fourier transform spectrometer measuring the radiance emitted from atmosphere in limb geometry thermal infrared spectral region. It was operated onboard ENVISAT satellite 2002 to 2012. Calibrated and geolocated spectra, so-called level 1b data, are basis retrieval of atmospheric parameters. In this paper we present error budget data most recent version 8 terms radiometric, spectral, line sight accuracy....
Abstract. In this study, we present simultaneous airborne measurements of peroxyacetyl nitrate (PAN), ethane (C2H6), formic acid (HCOOH), methanol (CH3OH), and ethylene (C2H4) above the South Atlantic in September October 2019. Observations were obtained from Gimballed Limb Observer for Radiance Imaging Atmosphere (GLORIA), as two-dimensional altitude cross sections along flight path. The flights part SouthTRAC (Transport Composition Southern Hemisphere Upper Troposphere/Lower Stratosphere)...
Vertical profiles of the most important species nocturnal total reactive nitrogen (NO y = NO 2 + HNO 3 ClONO N O 5 HO ) together with its source gas were retrieved from infrared limb emission spectra measured by Michelson Interferometer for Passive Atmospheric Sounding, Balloon‐borne version (MIPAS‐B) instrument inside late winter arctic vortex Kiruna (Sweden, 68°N) on 24 March 1997 and in summer midlatitudes Gap (France, 44°N) July 1997. The data compared to calculations performed...
A flight of the balloon‐borne version Michelson Interferometer for Passive Atmospheric Sounding (MIPAS‐B) was performed from Kiruna (Sweden, 68°N, 21°E) on 20/21 March 2003 as part validation program chemistry instruments MIPAS, GOMOS, and SCIAMACHY aboard European environmental satellite ENVISAT. The 15 hour long duration this provided a good match with Japanese Improved Limb Spectrometer (ILAS)‐II sensor ADEOS‐II satellite, launched in December 2002, addition to primary goal ENVISAT...
Abstract. We examine volume mixing ratios (vmr) retrieved from limb emission spectra recorded with the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) on board Envisat. In level 2 (L2) data products of three different retrieval processors, which perform one dimensional (1-D) retrievals, we find significant differences between species' profiles ascending and descending orbit parts. The relative vary systematically time year, latitude, altitude. lower stratosphere their...
Abstract. Measurements of the pollution trace gases ethane (C2H6), ethyne (C2H2), formic acid (HCOOH), and peroxyacetyl nitrate (PAN) were performed in North Atlantic upper troposphere lowermost stratosphere (UTLS) region with airborne limb imager GLORIA (Gimballed Limb Observer for Radiance Imaging Atmosphere) high spatial resolution down to cloud top. Observations made during flights German research aircraft HALO (High Altitude LOng Range Research Aircraft) frame WISE (Wave-driven...
Abstract. Organic compounds play a central role in troposphere chemistry and increasingly are viable target for remote sensing observations. In this paper, infra-red spectral features of three organic investigated thermal emission spectra recorded on flight 8 May 1998 near Aire sur l'Adour by balloon-borne instrument, MIPAS-B2, operating at high resolution. It is demonstrated, the first time, that PAN acetone can be detected upper troposphere; detection results presented tangent altitudes...
Abstract. Active chlorine species play a dominant role in the catalytic destruction of stratospheric ozone polar vortices during late winter and early spring seasons. Recently, correct understanding ClO dimer cycle was challenged by release new laboratory absorption cross sections (Pope et al., 2007) yielding significant model underestimates observed loss (von Hobe 2007). Under this aspect, nocturnal Arctic limb emission measurements carried out balloon version Michelson Interferometer for...
Abstract. Water vapour (H2O) is one of the operationally retrieved key species Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument aboard Environmental Satellite (ENVISAT) which was launched into its sun-synchronous orbit on 1 March 2002 and operated until April 2012. Within MIPAS validation activities, independent observations from balloons, aircraft, satellites, ground-based stations have been compared to European Space Agency (ESA) version 4.61 operational H2O...