Catherine Hourtolle

The 2023 Flight of the Faint Intergalactic-medium Redshifted Emission Balloon

Drew M. Miles, Vincent Picouet, Zeren Lin, Ignacio Cevallos-Aleman et autres

Abstract The second iteration of the Faint Intergalactic-medium Redshifted Emission Balloon (FIREBall-2) is a UV multiobject spectrograph designed to detect emission from the circumgalactic and circumquasar medium at low redshifts (z < 1). The FIREBall-2 instrument uses a zero-pressure suborbital balloon to …

The Faint Intergalactic-medium Redshifted Emission Balloon (FIREBall-2)

Drew M. Miles, Vincent Picouet, Chris Martin, Erika Hamden et autres

The Faint Intergalactic Medium Redshifted Emission Balloon (FIREBall-2) is a UV multi-object spectrograph designed to detect emission from the circumgalactic and circumquasar medium at low redshifts (0.3 < z < 1.0). The FIREBall-2 spectrograph uses a suborbital balloon vehicle to access a …

us, fr (code pays fourni par la source)

FIREBall-2 UV balloon telescope in-flight calibration system

Jessica Li, Nazende I. Kerkeser, Aafaque R. Khan, Simran Agarwal et autres

We present the integration of a new calibration system into the Faint Intergalactic-medium Redshifted Emission Balloon-2 (FIREBall-2), which added in-flight calibration capability for the recent September 2023 flight. This system is composed of a calibration source box containing zinc and deuterium lamp …

us, fr (code pays fourni par la source)

Formation flight handling with 4 satellites – Electronic Earth Observation as an application

Cédric Delmas, Catherine Hourtolle, Yoann Prevot

operates several satellites dedicated to earth observation of many kinds.Some of these observations, as the ones made by the ELISA satellites, require to fly in formation to fulfill its objectives. ELISA (ELectronic Intelligence by SAtellite) is a project sponsored by CNES and …

fr, my (code pays fourni par la source)

Mitigate collision risk: different approaches for different missions

S. Ait-Zaid, Christophe Ferrier, Yoann Ducassou, Catherine Hourtolle et autres

CNES operates nine "Mini-Micro" spacecrafts.CNES' flight dynamics team is responsible for these satellites' station-keeping as well as for the mitigation of collision risks with space debris.CNES' CAESAR department is dedicated to collision risks detection, monitoring and collision probability calculation.When the probability of …

fr, my (code pays fourni par la source)

De-Orbit Strategies With Low-Thrust Propulsion

Audrey Gaudel, Catherine Hourtolle, J. F. Goester, Natalia Fuentes et autres

fr (code pays fourni par la source)

Risk Assessment During the Final Phase of an Uncontrolled Re-Entry

Audrey Gaudel, Catherine Hourtolle, J. F. Goester, Natalia Fuentes

Debris assessment for Skybridge constellation

F. Alby, M. Danvel, Catherine Hourtolle, Eric Frayssinhes

fr (code pays fourni par la source)

A software fault tolerance experiment for space applications

David E. Simon, Catherine Hourtolle, H. Biondi, J. Bernelas et autres

The aim of the experiment described was to implement and assess fault-tolerant software within an industrial framework. Another significant aspect was to adapt the classical software engineering life cycle to this type of project. Two complementary techniques are considered: fault avoidance through …

fr (code pays fourni par la source)

Conception de logiciels sûrs de fonctionnement : analyse de la sécurité des logiciels : mécanismes de décision pour la programmation en n-versions

Catherine Hourtolle

Une etude d'analyse de securite permettant la recherche des fonctions et des modes de defaillance critiques du logiciel est presentee. Elle repose sur l'utilisation conjointe de trois techniques d'analyses: l'analyse des modes de defaillance et de leurs effets (amde), l'analyse par arbres …