Jonas Hedin
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View article: The MATS satellite: limb image data processing and calibration
The MATS satellite: limb image data processing and calibration Open
MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite mission designed to investigate atmospheric gravity waves. In order to observe wave patterns, MATS observes structures in the O2 atmospheric band airglow…
View article: A statistical study of the O <sub>2</sub> Atm(0-0) aurora observed by the Swedish satellite MATS
A statistical study of the O <sub>2</sub> Atm(0-0) aurora observed by the Swedish satellite MATS Open
This study conducts a statistical analysis of the aurora observed by the Swedish satellite MATS. MATS' main instrument is a telescope that performs limb imaging at six different wavelengths intervals, among them the 762 nm wavelength emiss…
View article: Radio telemetry reveals extensive dispersal capabilities of reintroduced Great Capricorn beetles ( <i>Cerambyx cerdo</i> ) in oak habitats at their northern range limit
Radio telemetry reveals extensive dispersal capabilities of reintroduced Great Capricorn beetles ( <i>Cerambyx cerdo</i> ) in oak habitats at their northern range limit Open
Amid accelerating global biodiversity loss, reintroducing and translocating endangered species have become pivotal conservation strategies. This study used radio telemetry to investigate the dispersal and movement patterns of the reintrodu…
View article: The MATS satellite: Limb image data processing and calibration
The MATS satellite: Limb image data processing and calibration Open
MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite mission designed to investigate atmospheric gravity waves. In order to observe wave patterns MATS observes structures in the O2 atmospheric band airglow …
View article: Ionospheric Plasma Parameters Measured by SPIDER‐2 Sounding Rocket During a Pulsating Aurora Event
Ionospheric Plasma Parameters Measured by SPIDER‐2 Sounding Rocket During a Pulsating Aurora Event Open
The Small Payloads for Investigation of Disturbances in Electrojet by Rockets 2 (SPIDER‐2) sounding rocket was launched from Esrange, Sweden, on the 19th of February 2020 at 23:14 UT. It traversed a pulsating aurora event, deploying eight …
View article: A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia
A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia Open
The paper describes technical characteristics and presents the first scientific results of a novel infrared imaging system (imager) for studies of nightglow emissions coming from the hydroxyl (OH) and molecular oxygen (O2) layers in the me…
View article: Comment on amt-2023-208
Comment on amt-2023-208 Open
Abstract. The paper describes technical characteristics and presents first scientific results of a novel infrared imaging system (imager) for studies of nightglow emissions coming from hydroxyl (OH) and molecular oxygen (O2) layers in the …
View article: A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia
A novel infrared imager for studies of hydroxyl and oxygen nightglow emissions in the mesopause above northern Scandinavia Open
The paper describes technical characteristics and presents first scientific results of a novel infrared imaging system (imager) for studies of nightglow emissions coming from hydroxyl (OH) and molecular oxygen (O2) layers in the mesopause …
View article: First light from the MATS satellite
First light from the MATS satellite Open
Global three-dimensional data are a key to understanding gravity waves in the mesosphere and lower thermosphere. MATS is a small Swedish satellite that aims at providing such fields using tomographic measurements of oxygen A-band airglow a…
View article: Comparison of middle- and low-latitude sodium layer from a ground-based lidar network, the Odin satellite, and WACCM–Na model
Comparison of middle- and low-latitude sodium layer from a ground-based lidar network, the Odin satellite, and WACCM–Na model Open
The ground-based measurements obtained from a lidar network and the 6-year OSIRIS (optical spectrograph and infrared imager system) limb-scanning radiance measurements made by the Odin satellite are used to study the climatology of the mid…
View article: Comparison of middle- and low-latitude sodium layer from a ground-based lidar network, the Odin satellite, and WACCM-Na model
Comparison of middle- and low-latitude sodium layer from a ground-based lidar network, the Odin satellite, and WACCM-Na model Open
The ground-based measurements obtained from a lidar network and the six-year OSIRIS limb-scanning radiance measurements made by the Odin satellite are used to study the climatology of the middle- and low-latitude sodium (Na) layer. Up to J…
View article: Sounding rocket project PMWE for investigation of polar mesosphere winter echoes
Sounding rocket project PMWE for investigation of polar mesosphere winter echoes Open
<p>Polar mesosphere winter echoes (PMWE) are relatively strong radar returns which are regularly observed by mesosphere/stratosphere/troposphere (MST) radars at high latitudes in winter. A sounding rocket project PMWE aimed at invest…
View article: Sounding rocket project “PMWE” for investigation of polar mesosphere winter echoes
Sounding rocket project “PMWE” for investigation of polar mesosphere winter echoes Open
A first sounding rocket campaign dedicated to investigate the creation mechanism of Polar Mesosphere Winter Echoes (PMWE) was conducted in April 2018 from the north Norwegian Andøya Space Center (69
\n∘
\nN, 16
\n∘
\nE). Two instrumented…
View article: Endophytes dominate fungal communities in six-year-old veteranisation wounds in living oak trunks
Endophytes dominate fungal communities in six-year-old veteranisation wounds in living oak trunks Open
Old trees are rare in the landscape, as are many of their associated species. Veteranisation is a method by which attempts are made to create microhabitats, otherwise found only in old trees, in younger trees at an earlier stage than would…
View article: The MATS satellite mission – gravity wave studies by Mesospheric Airglow/Aerosol Tomography and Spectroscopy
The MATS satellite mission – gravity wave studies by Mesospheric Airglow/Aerosol Tomography and Spectroscopy Open
Global three-dimensional data are a key to understanding gravity waves in the mesosphere and lower thermosphere. MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a new Swedish satellite mission that addresses this need. It…
View article: Simultaneous in situ measurements of small-scale structures in neutral, plasma, and atomic oxygen densities during the WADIS sounding rocket project
Simultaneous in situ measurements of small-scale structures in neutral, plasma, and atomic oxygen densities during the WADIS sounding rocket project Open
In this paper we present an overview of measurements conducted during the WADIS-2 rocket campaign. We investigate the effect of small-scale processes like gravity waves and turbulence on the distribution of atomic oxygen and other species …
View article: Atomic oxygen number densities in the mesosphere–lower thermosphere region measured by solid electrolyte sensors on WADIS-2
Atomic oxygen number densities in the mesosphere–lower thermosphere region measured by solid electrolyte sensors on WADIS-2 Open
Absolute profiles of atomic oxygen number densities with high vertical resolution have been determined in the mesosphere–lower thermosphere (MLT) region from in situ measurements by several rocket-borne solid electrolyte sensors. The amper…
View article: A new method of inferring the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe
A new method of inferring the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe Open
We present a new method of analyzing measurements of mesospheric dust made with DUSTY rocket-borne Faraday cup probes. It can yield the variation in fundamental dust parameters through a mesospheric cloud with an altitude resolution down t…
View article: Simultaneous in situ measurements of small-scale structures inneutral, plasma, and atomic oxygen densities during WADISsounding rocket project
Simultaneous in situ measurements of small-scale structures inneutral, plasma, and atomic oxygen densities during WADISsounding rocket project Open
In this paper we present an overview of measurements conducted during the WADIS-2 rocket campaign. We investigate the effect of small-scale processes like gravity waves and turbulence on the distribution of atomic oxygen and other species …
View article: Atmospheric band fitting coefficients derived from a self-consistent rocket-borne experiment
Atmospheric band fitting coefficients derived from a self-consistent rocket-borne experiment Open
Based on self-consistent rocket-borne measurements of temperature, the densities of atomic oxygen and neutral air, and the volume emission of the atmospheric band (762 nm), we examined the one-step and two-step excitation mechanism of O2b1…
View article: The MATS Satellite Mission – Gravity Waves Studies by Mesospheric Airglow/Aerosol Tomography and Spectroscopy
The MATS Satellite Mission – Gravity Waves Studies by Mesospheric Airglow/Aerosol Tomography and Spectroscopy Open
Global three-dimensional data are a key to understanding gravity wave interactions in the mesosphere and lower thermosphere. MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a new Swedish satellite mission that addresses t…
View article: Atomic oxygen number densities in the MLT region measured bysolid electrolyte sensors on WADIS-2
Atomic oxygen number densities in the MLT region measured bysolid electrolyte sensors on WADIS-2 Open
Absolute profiles of atomic oxygen number densities with high vertical resolution have been determined in the MLT region from in-situ measurements by several rocket-borne solid electrolyte sensors. The amperometric sensors were operated in…
View article: Atmospheric Band Fitting Coefficients Derived from Self-Consistent Rocket-Borne Experiment
Atmospheric Band Fitting Coefficients Derived from Self-Consistent Rocket-Borne Experiment Open
Based on self-consistent rocket-borne measurements of temperature, densities of atomic oxygen and neutral air, and volume emission of the Atmospheric Band (762 nm) we examined the one-step and two-step excitation mechanism of O2(b1Σg&p…
View article: A new method to infer the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe
A new method to infer the size, number density, and charge of mesospheric dust from its in situ collection by the DUSTY probe Open
We present a new extended method of analyzing measurements of mesospheric dust made with DUSTY rocket-borne Faraday cup probes. It yields the variation of fundamental dust parameters through a mesospheric cloud with an unrivalled altitude …
View article: New insights for mesospheric OH: multi-quantum vibrational relaxation as a driver for non-local thermodynamic equilibrium
New insights for mesospheric OH: multi-quantum vibrational relaxation as a driver for non-local thermodynamic equilibrium Open
The question of whether mesospheric OH(v) rotational population distributions are in equilibrium with the local kinetic temperature has been debated over several decades. Despite several indications for the existence of non-equilibrium eff…
View article: Atmosphere Density Measurements Using GPS Data from Rigid Falling Spheres
Atmosphere Density Measurements Using GPS Data from Rigid Falling Spheres Open
Atmospheric density profiles in the stratosphere and mesosphere are determined by means of low cost Global Positioning System (GPS) receivers on in situ rigid falling spheres released from a sounding rocket. Values below an altitude of 80 …
View article: Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign
Spatial and temporal variability in MLT turbulence inferred from in situ and ground-based observations during the WADIS-1 sounding rocket campaign Open
In summer 2013 the WADIS-1 sounding rocket campaign was conducted at the Andøya Space Center (ACS) in northern Norway (69° N, 16° E). Among other things, it addressed the question of the variability in mesosphere/lower thermosphere (MLT) t…
View article: Design and Implementation of Corporate Actions on a Decentralized Securities Depository
Design and Implementation of Corporate Actions on a Decentralized Securities Depository Open
Trading securities is a process that requires multiple trusted intermediaries to ensure that the trade is done correctly. The securities industry is therefore very slow and expensive; the central securities depository (CSD) being one of th…