A5013141299- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Atmospheric Ozone and Climate
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Solar Radiation and Photovoltaics
- Geomagnetism and Paleomagnetism Studies
- Plasma Diagnostics and Applications
- Planetary Science and Exploration
- Electrohydrodynamics and Fluid Dynamics
- Infrared Target Detection Methodologies
- Astronomy and Astrophysical Research
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Space Satellite Systems and Control
- Laser-induced spectroscopy and plasma
- Earthquake Detection and Analysis
- Spacecraft Design and Technology
- Geophysics and Sensor Technology
- Molecular spectroscopy and chirality
- Plasma Applications and Diagnostics
- Optical Polarization and Ellipsometry
- Atmospheric chemistry and aerosols
- Solar Thermal and Photovoltaic Systems
Space Research Institute
2024-2025
Austrian Academy of Sciences
2024-2025
KTH Royal Institute of Technology
2017-2024
Leibniz Institute of Atmospheric Physics at the Rostock University
2017-2021
National Astronomical Observatory of Japan
2013-2018
National Institutes of Natural Sciences
2016-2017
The Graduate University for Advanced Studies, SOKENDAI
2017
Gunma Astronomical Observatory
2015
Université Claude Bernard Lyon 1
2011
There is a thin transition region (TR) in the solar atmosphere where temperature rises from 10,000 K chromosphere to millions of degrees corona. Little known about mechanisms that dominate this enigmatic other than magnetic field plays key role. The magnetism TR can only be detected by polarimetric measurements few ultraviolet (UV) spectral lines, Lyman-$\alpha$ line neutral hydrogen at 121.6 nm (the strongest UV spectrum) being particular interest given its sensitivity Hanle effect...
Abstract. Global three-dimensional data are a key to understanding gravity waves in the mesosphere and lower thermosphere. MATS (Mesospheric Airglow/Aerosol Tomography Spectroscopy) is new Swedish satellite mission that addresses this need. It applies space-borne limb imaging combination with tomographic spectroscopic analysis obtain wave on relevant spatial scales. Primary measurement targets O2 atmospheric band dayglow nightglow near infrared, sunlight scattered from noctilucent clouds...
Abstract The Small Payloads for Investigation of Disturbances in Electrojet by Rockets 2 (SPIDER‐2) sounding rocket was launched from Esrange, Sweden, on the 19th February 2020 at 23:14 UT. It traversed a pulsating aurora event, deploying eight free falling units which provided situ multi‐point measurements electric field, magnetic field and plasma parameters. In this article, measured parameters have been analyzed compared with each other optical obtained ground based instrumentation. Peaks...
Abstract. MATS (Mesospheric Airglow/Aerosol Tomography and Spectroscopy) is a Swedish satellite mission designed to investigate atmospheric gravity waves. In order observe wave patterns observes structures in the O2 band airglow (light emitted by oxygen molecules Mesosphere Lower Thermosphere), as well noctilucent clouds which form around Mesopause. The main instrument telescope that continuously captures high-resolution images of limb. Using tomographic analysis acquired images, can...
BepiColombo, the joint ESA-JAXA mission on route to planet Mercury, was launched in 2018. After eight successful planetary flybys, spacecraft had its final Mercury flyby 08 Jan 2025. The PICAM (Planetary Ion Camera) instrument, part of SERENA package, operational from 48 hours prior closest encounter, until afterwards. This ion sensor successfully monitored upstream solar wind, as well magnetospheric and ions at vicinity Mercury. Near planet, operated mass spectrometry mode using Hadamard...
A first sounding rocket campaign dedicated to investigate the creation mechanism of Polar Mesosphere Winter Echoes (PMWE) was conducted in April 2018 from north Norwegian Andøya Space Center (69 °N, 16 °E). Two instrumented rockets were launched on 13th and 18th under PMWE non-PMWE conditions, respectively. In this paper we give an overview mission. We describe discuss some results combined situ ground-based measurements which allow verify existing theories. Our ultimately show that: a)...
ABSTRACT High-cadence observations by the slit-jaw (SJ) optics system of sounding rocket experiment known as Chromospheric Lyman Alpha Spectropolarimeter (CLASP) reveal ubiquitous intensity disturbances that recurrently propagate in either chromosphere or transition region both at a speed much higher than sound. The CLASP/SJ instrument provides time series two-dimensional images taken with broadband filters centered on Ly α line 0.6 s cadence. multiple fast-propagating appear quiet Sun and...
Abstract Several recent studies derived the existence of plumes on Jupiter’s moon Europa. The only technique that provided multiple detections is far-ultraviolet imaging observations Europa in transit Jupiter taken by Space Telescope Imaging Spectrograph (STIS) Hubble ( HST ). In this study, we reanalyze three /STIS images which Sparks et al. identified limb anomalies as evidence for Europa’s plume activity. After reproducing results al., find positive outliers are similarly present negative...
Abstract The Chromospheric Lyman-Alpha Spectro-Polarimeter is a sounding rocket experiment that has provided the first successful measurement of linear polarization produced by scattering processes in hydrogen Ly α line (121.57 nm) radiation solar disk. In this paper, we report Si iii at 120.65 nm also shows and compare signals observed lines order to search for observational signatures Hanle effect. We focus on four selected bright structures investigate how U / I spatial variations vary...
We present measurements of the electron density, effective temperature, plasma potential, and energy probability function (EEPF) in plume a 1.5 kW-class SPT-100 Hall thruster, derived from cylindrical Langmuir probe measurements. The were taken on axis at distances between 550 1550 mm thruster exit plane, different angles for three operating points characterized by discharge voltages mass flow rates. bulk population can be approximated as Maxwellian distribution, but measured distributions...
Context. The study of solar irradiance variability is great importance in heliophysics, the Earth's climate, and space weather applications. These studies require careful identifying, tracking monitoring active regions (ARs), coronal holes (CHs), quiet Sun (QS).
Context. The magnetic field plays a dominant role in the solar irradiance variability. Determining contribution of various features to this variability is important context heliospheric studies and Sun-Earth connection.
The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is a sounding-rocket instrument developed at the National Astronomical Observatory of Japan (NAOJ) as part an international collaboration. main scientific goal to achieve polarization measurement Lyman-α line 121.56 nm emitted from solar upper-chromosphere and transition region with unprecedented 0.1% accuracy. optics are composed Cassegrain telescope coated "cold mirror" coating optimized for UV reflection dual-channel...
Abstract. Characterising the photoelectron current induced by Sun's UV radiation is crucial to ensure accurate daylight measurements from particle detectors. This article lays out methodology used address this problem in case of meteoric smoke detectors (MSPDs), developed Leibniz Institute Atmospheric Physics Kühlungsborn (IAP) and flown on board PMWEs (Polar Mesosphere Winter Echoes) sounding rockets April 2018. The focuses two complementary aspects: modelling experimental measurements. A...
Abstract The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is a suborbital rocket experiment that on 2015 September 3 measured the linear polarization produced by scattering processes in hydrogen Ly α line of solar disk radiation. line-center photons this spectral radiation mostly stem from chromosphere-corona transition region (TR). These unprecedented spectropolarimetric observations revealed an interesting surprise, namely there practically no center-to-limb variation (CLV) Q / I...
Abstract The Small Payloads for Investigation of Disturbances in Electrojet by Rockets (SPIDER) sounding rocket was launched on February 2nd, 2016 (21:09 UT), deploying 10 free falling units (FFUs) inside a westward traveling auroral surge. Each FFUs deployed spherical electric field and Langmuir probes wire‐booms, providing situ multi‐point recordings the plasma properties. analytical retrieval parameters, namely electron density, temperature potential, from probe measurements non‐trivial...
The atmosphere of Jupiter's volcanic moon Io consists mainly sulfur dioxide (SO2), and this main constituent has been studied with a variety observing techniques across many wavelengths over the years. Here we study absorption by SO2 at hydrogen Ly-α line (1216 Å) in large set images taken Space Telescope Imaging Spectrograph (STIS) onboard Hubble (HST) between 1997 2018. An advanced statistical analysis using Monte-Carlo trial method is applied to derive column density from intensity, which...
Abstract A central challenge in the modeling of near-collisionless expansion a plasma thruster plume into vacuum is inadequacy traditional fluid closure relations for electron species, such as isothermal or adiabatic laws, because response essentially kinetic and global. This work presents validation model presented (Merino et al 2018 Plasma Sources Sci. Technol. 27 035013) against experimental measurements SPT-100-ML Hall running on xenon (Giono 015006). The predictions are compared...
The MATS satellite aims at observing airglow and noctilucent clouds in the mesosphere. main instrument consists of a six channels limb imager near-ultraviolet near-infrared. A high signal-to-noise ratio is required for detecting these mesospheric phenomena: 100 500 ultraviolet infrared, respectively. This achieved by an optical design minimizing stray-light, but also with dedicated read-out analogue chain CCD on each channel. requirements expected light level imaging are brie y discussed...
Abstract. Global three-dimensional data are a key to understanding gravity wave interactions in the mesosphere and lower thermosphere. MATS (Mesospheric Airglow/Aerosol Tomography Spectroscopy) is new Swedish satellite mission that addresses this need. It applies space-borne limb imaging combination with tomographic spectroscopic analysis obtain on relevant spatial scales. Primary measurement targets O2 Atmospheric Band dayglow nightglow near infrared, sunlight scattered from noctilucent...