J. Caron
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View article: Infrared Satellite Detection Limits for Monitoring Atmospheric Ammonia
Infrared Satellite Detection Limits for Monitoring Atmospheric Ammonia Open
This study investigates single pixel nadir viewing detection limit of atmospheric ammonia for a range of area flux mapping satellite infrared sensor spectral resolutions (0.05–2.0 cm−1) and measurement noise levels. The detection level of …
View article: Laser-driven ion and electron acceleration from near-critical density gas targets: Towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime
Laser-driven ion and electron acceleration from near-critical density gas targets: Towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime Open
Ion acceleration from gaseous targets driven by relativistic-intensity lasers was demonstrated as early as the late 1990s, yet most of the experiments conducted to date have involved picosecond-duration, Nd:glass lasers operating at low re…
View article: Laser-driven ion and electron acceleration from near-critical density gas targets: towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime
Laser-driven ion and electron acceleration from near-critical density gas targets: towards high-repetition rate operation in the 1 PW, sub-100 fs laser interaction regime Open
Ion acceleration from gaseous targets driven by relativistic-intensity lasers was demonstrated as early as the late 90s, yet most of the experiments conducted to date have involved picosecond-duration, Nd:glass lasers operating at low repe…
View article: Scaling slowly rotating asteroids with stellar occultations
Scaling slowly rotating asteroids with stellar occultations Open
Context. As evidenced by recent survey results, the majority of asteroids are slow rotators (spin periods longer than 12 h), but lack spin and shape models because of selection bias. This bias is skewing our overall understanding of the sp…
View article: Performance and polarization response of slit homogenizers for the GeoCarb mission
Performance and polarization response of slit homogenizers for the GeoCarb mission Open
The observing strategy of the Geostationary Carbon Observatory (GeoCarb), which is a “step and stare” approach, can lead to distortions in the instrument spectral response function (ISRF) when there are gradients in brightness across instr…
View article: Performance and polarization response of Slit Homogenizers for the GeoCarb Mission
Performance and polarization response of Slit Homogenizers for the GeoCarb Mission Open
The observing strategy of the Geostationary Carbon Observatory (GeoCarb), which is a "step and stare" approach, can lead to distortions in the instrument spectral response function (ISRF) when there are gradients in brightness across instr…
View article: Progress in freeform mirror design for space applications
Progress in freeform mirror design for space applications Open
Off-axis systems with freeform mirrors is a design approach of increasing importance for space instruments. While the off-axis reflective approach allows simple, versatile and obstruction free designs, the use of freeform surfaces allows t…
View article: Prediction model for diffuser-induced spectral features in imaging spectrometers
Prediction model for diffuser-induced spectral features in imaging spectrometers Open
Wide-field spectrometers for Earth observation missions require in-flight radiometric calibration for which the Sun can be used as a known reference. Therefore, a diffuser is placed in front of the spectrometer in order to scatter the inco…
View article: Modeling of High-Energy Particles and Radiation Production for Multipetawatt Laser Facilities
Modeling of High-Energy Particles and Radiation Production for Multipetawatt Laser Facilities Open
The advent of high-energy short-pulse laser beams poses new problems related to radiation protection. The radiation generated in experiments using multipetawatt laser systems leads to prompt doses and potentially to the activation of the m…
View article: Ion acceleration by an ultrashort laser pulse interacting with a near-critical-density gas jet
Ion acceleration by an ultrashort laser pulse interacting with a near-critical-density gas jet Open
We demonstrate laser-driven Helium ion acceleration with cut-off energies above 25 MeV and peaked ion number above $10^8$ /MeV for 22(2) MeV projectiles from near-critical density gas jet targets. We employed shock gas jet nozzles at the h…
View article: Prediction Model for Diffuser Induced Spectral Features in Imaging Spectrometers
Prediction Model for Diffuser Induced Spectral Features in Imaging Spectrometers Open
Wide-field spectrometers for Earth Observation missions require inflight radiometric calibration, for which the sun can be used as a known reference. Therefor a diffuser is placed in front of the spectrometer in order to scatter the incomi…
View article: SPEXone: a compact multi-angle polarimeter
SPEXone: a compact multi-angle polarimeter Open
We have developed a 6 dm3-sized optical instrument to characterize the microphysical properties of fine particulate matter or aerosol in the Earth atmosphere from low Earth orbit. Our instrument can provide detailed and worldwide knowledge…
View article: StrayLux: an efficient tool for stray-light modelling in optical instruments
StrayLux: an efficient tool for stray-light modelling in optical instruments Open
Stray-light components are an unavoidable part of the signal detected by most optical instrument; they can originate from different sources and optical design solutions can help reducing some of them. Diffuse stray-light results from the s…
View article: Slit homogenizers for Earth observation spectrometers: overview on performance, present and future designs
Slit homogenizers for Earth observation spectrometers: overview on performance, present and future designs Open
Tropomi, successfully launched in October 2017, and Sentinel-5, with launch due in 2021, are two pushbroom spectrometers measuring Earth's radiance from a Low Earth Orbit (LEO) at a high spectral resolution. Both instruments have strongly …
View article: Photochemistry on the Space Station—Aptamer Resistance to Space Conditions: Particles Exposure from Irradiation Facilities and Real Exposure Outside the International Space Station
Photochemistry on the Space Station—Aptamer Resistance to Space Conditions: Particles Exposure from Irradiation Facilities and Real Exposure Outside the International Space Station Open
Some microarray-based instruments that use bioaffinity receptors such as antibodies or aptamers are under development to detect signatures of past or present life on planetary bodies. Studying the resistance of such instruments against spa…
View article: The GMES Sentinel-5 mission for operational atmospheric monitoring: status and developments
The GMES Sentinel-5 mission for operational atmospheric monitoring: status and developments Open
Sentinel-5 is an atmospheric monitoring mission planned in the frame of the joint EU/ESA initiative Global Monitoring for Environment and Security (GMES). The objective of the mission, planned to be launched in 2020, is the operational mon…
View article: LIDAR technology developments in support of ESA Earth observation missions
LIDAR technology developments in support of ESA Earth observation missions Open
Critical lidar technology developments have been ongoing at the European Space Agency (ESA) in support of EarthCARE (Earth Clouds, Aerosols, and Radiation Explorer), the 6th Earth Explorer mission, and A-SCOPE (Advanced Space Carbon and Cl…
View article: Polarization scramblers in Earth observing spectrometers: lessons learned from Sentinel-4 and 5 phases A/B1
Polarization scramblers in Earth observing spectrometers: lessons learned from Sentinel-4 and 5 phases A/B1 Open
Sensitivity to polarization is a major design driver for Earth observing dispersive spectrometers. While the measured Earth radiance observed from space in the UV, visible and near IR bands has a strong and highly variable linearly polariz…
View article: The MetOp second generation 3MI mission
The MetOp second generation 3MI mission Open
ESA is currently running two parallel, competitive phase A/B1 studies for MetOp Second Generation (MetOp-SG). MetOp-SG is the space segment of EUMETSAT Polar System (EPS-SG) consisting of the satellites and instruments. The Phase A/B1 stud…
View article: The CarbonSat candidate mission: radiometric and spectral performances over spatially heterogeneous scenes
The CarbonSat candidate mission: radiometric and spectral performances over spatially heterogeneous scenes Open
CarbonSat is one of the two candidate missions for the 8th cycle of European Space Agency (ESA) Earth Explorers, currently undergoing feasibility studies with two industrial consortia. The mission aims at quantifying the spatial distributi…
View article: The CarbonSat candidate mission for imaging greenhouse gases from space: concepts and system requirements
The CarbonSat candidate mission for imaging greenhouse gases from space: concepts and system requirements Open
CarbonSat is a candidate mission for ESA's Earth Explorer program, currently undergoing industrial feasibility studies. The primary mission objective is the identification and quantification of regional and local sources and sinks of carbo…
View article: Towards a standardized method to assess straylight in earth observing optical instruments
Towards a standardized method to assess straylight in earth observing optical instruments Open
Straylight is a spurious effect that can seriously degrade the radiometric accuracy achieved by Earth observing optical instruments, as a result of the high contrast in the observed Earth radiance scenes and spectra. It is considered criti…
View article: Sodern recent development in the design and verification of passive polarization scramblers for space applications
Sodern recent development in the design and verification of passive polarization scramblers for space applications Open
For an imaging spectrometer, the changing polarization properties of the incoming beam is a performance limiting factor. Indeed, while it is impossible to know in advance what the polarization state of the beam will be, the efficiency of t…
View article: Carbonsat instrument pre- developments: towards monitoring carbon dioxide and methane concentrations from space
Carbonsat instrument pre- developments: towards monitoring carbon dioxide and methane concentrations from space Open
CarbonSat was a candidate satellite mission in the frame of ESA's Living Planet Programme, which targeted high-precision measurements of carbon dioxide (CO2) and methane (CH4) concentrations from space.