Stefan Noll
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View article: PALACE v1.0: Paranal Airglow Line And Continuum Emission model
PALACE v1.0: Paranal Airglow Line And Continuum Emission model Open
Below about 2.3 µm, the nighttime emission of the Earth's atmosphere is dominated by non-thermal radiation. Excluding aurorae, the emission is caused by chemical reaction chains that are driven by the daytime photolysis and photoionisation…
View article: PALACE v1.0: Paranal Airglow Line And Continuum Emission model
PALACE v1.0: Paranal Airglow Line And Continuum Emission model Open
Below about 2.3 µm, the nighttime emission of the Earth's atmosphere is dominated by non-thermal radiation. Excluding aurorae, the emission is caused by chemical reaction chains which are driven by the daytime photolysis and photoionisatio…
View article: Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1800 nm: evidence for HO <sub>2</sub> emission in the near-infrared
Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1800 nm: evidence for HO <sub>2</sub> emission in the near-infrared Open
The Earth's mesopause region between about 75 and 105 km is characterised by chemiluminescent emission from various lines of different molecules and atoms. This emission was and is important for the study of the chemistry and dynamics in t…
View article: Reply on RC1
Reply on RC1 Open
Abstract. The Earth's mesopause region between about 75 and 105 km is characterised by chemiluminescent emission from various lines of different molecules and atoms. This emission was and is important for the study of the …
View article: Reply on RC2
Reply on RC2 Open
Abstract. The Earth's mesopause region between about 75 and 105 km is characterised by chemiluminescent emission from various lines of different molecules and atoms. This emission was and is important for the study of the …
View article: Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1,800 nm: evidence for HO <sub>2</sub> emission in the near-infrared
Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1,800 nm: evidence for HO <sub>2</sub> emission in the near-infrared Open
The Earth's mesopause region between about 75 and 105 km is characterised by chemiluminescent emission from various lines of different molecules and atoms. This emission was and is important for the study of the chemistry and dynamics in t…
View article: Measurements and simulations of the nightglow continuum at Cerro Paranal
Measurements and simulations of the nightglow continuum at Cerro Paranal Open
The provided ASCII files constitute data sets that are related to the paper "Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1,800 nm: evidence for HO2 emission in the near-infrared", which has be…
View article: Measurements and simulations of the nightglow continuum at Cerro Paranal
Measurements and simulations of the nightglow continuum at Cerro Paranal Open
The provided ASCII files constitute data sets that are related to the paper "Structure, variability, and origin of the low-latitude nightglow continuum between 300 and 1,800 nm: evidence for HO2 emission in the near-infrared", which has be…
View article: Hypothesis to Explain Threshold Drift due to Dynamic Bipolar Gate Stress
Hypothesis to Explain Threshold Drift due to Dynamic Bipolar Gate Stress Open
We supply a hypothesis that explains threshold voltage ( V th ) drift under dynamic bipolar gate stress in SiC-MOSFETs, postulating that ionized donor-like interface traps in the lower half of the bandgap, give rise to an increased interna…
View article: Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra"
Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra" Open
The provided ASCII tables are related to the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra", which has been published in Journal of Geophysical Research: Atmospheres, Vol. 128, 2023 (DOI: 10.1029/2022JD038275…
View article: Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra"
Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra" Open
The provided ASCII tables are related to the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra", which has been published in Journal of Geophysical Research: Atmospheres, Vol. 128, 2023 (DOI: 10.1029/2022JD038275…
View article: Climatologies of Various OH Lines From About 90,000 X‐Shooter Spectra
Climatologies of Various OH Lines From About 90,000 X‐Shooter Spectra Open
The nocturnal mesopause region of the Earth's atmosphere radiates chemiluminescent emission from various roto‐vibrational bands of hydroxyl (OH), which is therefore a good tracer of the chemistry and dynamics at the emission altitudes. Int…
View article: Climatologies of Various OH Lines From About 90,000 X-shooter Spectra
Climatologies of Various OH Lines From About 90,000 X-shooter Spectra Open
The nocturnal mesopause region of the Earth's atmosphere radiates chemiluminescent emission from various roto-vibrational bands of hydroxyl (OH), which is therefore a good tracer of the chemistry and dynamics at the emission altitudes. Int…
View article: Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra"
Data for the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra" Open
The provided ASCII tables are related to the paper "Climatologies of Various OH Lines From About 90,000 X-shooter spectra", which has been accepted for publication in Journal of Geophysical Research: Atmospheres (expected DOI: 10.1029/2022…
View article: X-shooter-based climatologies of intensity, solar cycle effect, and residual variability for 298 OH lines
X-shooter-based climatologies of intensity, solar cycle effect, and residual variability for 298 OH lines Open
The line emission from the various roto-vibrational bands of the OH radical is an important tracer of the chemistry and dynamics in the Earth's nocturnal mesopause region between about 80 and 100 km. As most studies have focused either on …
View article: 3D reconstruction of atmospheric gravity waves and derivation of vertical wave parameters with tomography applied to data from two ground-based cameras observing OH airglow
3D reconstruction of atmospheric gravity waves and derivation of vertical wave parameters with tomography applied to data from two ground-based cameras observing OH airglow Open
Atmospheric gravity waves transport energy and momentum through the atmosphere and can travel large horizontal and vertical distances from the troposphere to the mesosphere and higher. They contribute to atmospheric dynamics and among othe…
View article: Ambient conditions and infrared sky brightness in the Chilean Atacama Desert
Ambient conditions and infrared sky brightness in the Chilean Atacama Desert Open
The Atacama Desert in the Chilean Andes region is one of the dryest areas in the world. Due to its unique location with stable subtropical meteorological conditions and high mountains, it is an ideal site for the astronomical telescope fac…
View article: Effective Emission Heights of Various OH Lines From X‐Shooter and SABER Observations of a Passing Quasi‐2‐Day Wave
Effective Emission Heights of Various OH Lines From X‐Shooter and SABER Observations of a Passing Quasi‐2‐Day Wave Open
Chemiluminescent radiation of the vibrationally and rotationally excited hydroxyl (OH) radical, which dominates the nighttime near‐infrared emission of the Earth's atmosphere in wide wavelength regions, is an important tracer of the chemic…
View article: Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave
Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave Open
Chemiluminescent radiation of the vibrationally and rotationally excited OH radical, which dominates the nighttime near-infrared emission of the Earth's atmosphere in wide wavelength regions, is an important tracer of the chemical and dyna…
View article: Data for the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave"
Data for the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave" Open
The provided ASCII tables are related to the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave", which has been published in Journal of Geophysical Research: Atmospher…
View article: Data for the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave"
Data for the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave" Open
The provided ASCII tables are related to the paper "Effective Emission Heights of Various OH Lines From X-shooter and SABER Observations of a Passing Quasi-2-Day Wave", which has been published in Journal of Geophysical Research: Atmospher…
View article: Vertical layering of OH line emission from X-shooter and SABER observations of a passing quasi-2-day wave
Vertical layering of OH line emission from X-shooter and SABER observations of a passing quasi-2-day wave Open
<p>The nighttime near-infrared radiation of the Earth's atmosphere is mainly produced in the mesopause region between 80 and 100 km by chemiluminescent emission of the OH radical. The line radiation of various vibrational and rotatio…
View article: A small DOAS device for student training
A small DOAS device for student training Open
<p>Differential optical absorption spectroscopy (DOAS) has become a standard method for analysing the amount of various molecular species in the Earth's atmosphere. For student education we have developed a small device aiming to be …
View article: The ESO’s Extremely Large Telescope Working Groups
The ESO’s Extremely Large Telescope Working Groups Open
Since 2005 ESO has been working with its community and industry to develop an extremely large optical/infrared telescope. ESO’s Extremely Large Telescope, or ELT for short, is a revolutionary ground-based telescope that will have a 39-metr…
View article: Variability of various nightglow emissions from about 100,000 VLT/X-shooter spectra
Variability of various nightglow emissions from about 100,000 VLT/X-shooter spectra Open
<p>Chemiluminescent emission from the mesopause region between 75 and 105 km dominates the Earth's low-to-mid-latitude nocturnal radiation in the wavelength domain from the near-UV to the near-IR. This nightglow consists of various r…
View article: A full decade (2009-2019) of continuous nightglow observations from the NUV to the NIR
A full decade (2009-2019) of continuous nightglow observations from the NUV to the NIR Open
<p>The airglow emission of the mesopause region comprises molecular bands and atomic lines in the near-ultraviolet to the near-infrared wavelength range, e.g. the prominent roto-vibrational OH bands, a weak FeO/NiO continuum, the gre…
View article: Bolometric night sky temperature and subcooling of telescope structures
Bolometric night sky temperature and subcooling of telescope structures Open
\nContext. The term sky temperature is used in the literature to refer to different phenomena in different contexts which often leads to confusion. In this work, we study Tsky, the effective bolometric sky temperature at which a hemispheri…
View article: PCB-Embedded GaN-on-Si Half-Bridge and Driver ICs With On-Package Gate and DC-Link Capacitors
PCB-Embedded GaN-on-Si Half-Bridge and Driver ICs With On-Package Gate and DC-Link Capacitors Open
A low-inductive half-bridge and gate driver package with on-package gate and dc-link capacitors is realized by printed circuit board (PCB) embedding of two GaN-on-Si ICs. While monolithic half-bridge and driver integration reduces on-chip …
View article: OH level populations and accuracies of Einstein- <i>A</i> coefficients from hundreds of measured lines
OH level populations and accuracies of Einstein- <i>A</i> coefficients from hundreds of measured lines Open
OH airglow is an important nocturnal emission of the Earth's mesopause region. As it is chemiluminescent radiation in a thin medium, the population distribution over the various roto-vibrational OH energy levels of the electronic ground st…
View article: Model studies on vibrationally-rotationally excited hydroxyl molecules in the mesopause region
Model studies on vibrationally-rotationally excited hydroxyl molecules in the mesopause region Open
<p>One of the standard methods to remotely sense the temperature of the mesopause region is based on spectroscopic measurements of near-infrared emissions of vibrationally-rotationally excited hydroxyl molecules, and to calculate &am…