Euclid
A. AnselmiThales Alenia Space – Euclid satellite Prime contractorA. (A) AnselmiThales Alenia Space – Euclid satellite Prime contractorR. (R) LaureijsEuropean Space Agency/ESTECR. LaureijsEuropean Space Agency/ESTECG. (G.D) RaccaEuropean Space Agency/ESTECGiuseppe D. RaccaEuropean Space Agency/ESTECG. CostaAerospace Logistics Technology Engineering CompanyG. D. RaccaAerospace Logistics Technology Engineering CompanyG. A. CostaAirbus Defence & Space SASL. Courcould MifsudAirbus Defence & Space SASJ.-C. CuillandreUniversité Paris-SaclayM. GotteroThales Alenia Space – Euclid satellite Prime contractorH. (H) HoekstraLeiden Observatory, Leiden UniversityHenk HoekstraLeiden Observatory, Leiden UniversityK. KuijkenLeiden Observatory, Leiden UniversityK. (K) KuijkenLeiden Observatory, Leiden UniversityKonrad KuijkenThales Alenia Space – Euclid satellite Prime contractorV. MareschiThales Alenia Space – Euclid satellite Prime contractorL. MillerDepartment of Physics, Oxford UniversityL. (L) MillerDepartment of Physics, Oxford UniversityS. MottiniThales Alenia Space – Euclid satellite Prime contractorD. (D) StramaccioniEuropean Space Agency/ESTECSergio MottiniEuropean Space Agency/ESTECB. AltieriESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloB. (B) AltieriESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloA. (A) AmaraSchool of Mathematics and Physics, University of Surrey, GuildfordA. AmaraSchool of Mathematics and Physics, University of Surrey, GuildfordS. AndreonINAF – Osservatorio Astronomico di BreraS. (S) AndreonINAF – Osservatorio Astronomico di BreraN. (N) AuricchioINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaC. (C) BaccigalupiIFPU, Institute for Fundamental Physics of the UniverseN. AuricchioIFPU, Institute for Fundamental Physics of the UniverseM. (M) BaldiDipartimento di Fisica e Astronomia, Università di BolognaC. BaccigalupiDipartimento di Fisica e Astronomia, Università di BolognaA. (A) BalestraINAF – Osservatorio Astronomico di PadovaM BaldiINAF – Osservatorio Astronomico di PadovaS. BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. (S) BardelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaR. (R) BenderMax Planck Institute for Extraterrestrial PhysicsS BardelliMax Planck Institute for Extraterrestrial PhysicsR. BenderIFPU, Institute for Fundamental Physics of the UniverseA. (A) BivianoIFPU, Institute for Fundamental Physics of the UniverseE. BranchiniDipartimento di Fisica, Università di GenovaE. (E) BranchiniDipartimento di Fisica, Università di GenovaM. (M) BresciaDepartment of Physics “E. Pancini”, University Federico IIM. BresciaDepartment of Physics “E. Pancini”, University Federico IIM BresciaDipartimento di Fisica, Università degli Studi di TorinoS. (S) CameraDipartimento di Fisica, Università degli Studi di TorinoG. (G) Canas-HerreraEuropean Space Agency/ESTECS CameraEuropean Space Agency/ESTECG Cañas-HerreraINAF – Osservatorio Astrofisico di TorinoV. (V) CapobiancoINAF – Osservatorio Astrofisico di TorinoC. CarboneINAF-IASF MilanoC. (C) CarboneINAF-IASF MilanoJ. CarreteroCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)J. (J) CarreteroCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT)M. (M) CastellanoINAF-Osservatorio Astronomico di RomaG. (G) CastignaniINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM. G. CastellanoINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaG. CastignaniINAF – Osservatorio Astronomico di CapodimonteS. (S) CavuotiINAF – Osservatorio Astronomico di CapodimonteA. (A) CimattiDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaA. CimattiDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaC. (C) Colodro-CondeInstituto de Astrofísica de Canarias, Vía LácteaC. Colodro-CondeInstituto de Astrofísica de Canarias, Vía LácteaG. CongedoInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillG. (G) CongedoInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillC. (C.J) ConseliceJodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of ManchesterL. (L) ConversiESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloL. ConversiESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloY. CopinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822Y. (Y) CopinUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822F. CourbinInstitució Catalana de Recerca i Estudis Avançats (ICREA)F. (F) CourbinInstitució Catalana de Recerca i Estudis Avançats (ICREA)H. (H.M) CourtoisUCB Lyon 1, CNRS/IN2P3, IUF, IP2I LyonH. M. CourtoisUCB Lyon 1, CNRS/IN2P3, IUF, IP2I LyonM. (M) CropperMullard Space Science Laboratory, University College London, Holmbury St Mary, DorkingM. CropperMullard Space Science Laboratory, University College London, Holmbury St Mary, DorkingA. Da SilvaDepartamento de Física, Faculdade de Ciências, Universidade de LisboaA. (A) da SilvaDepartamento de Física, Faculdade de Ciências, Universidade de LisboaH. (H) DegaudenziDepartment of Astronomy, University of GenevaH. DegaudenziDepartment of Astronomy, University of GenevaG. (G) de LuciaINAF – Osservatorio Astronomico di TriesteH. DoleUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeH. (H) DoleUniversité Paris-Saclay, CNRS, Institut d’astrophysique spatialeF. (F) DubathDepartment of Astronomy, University of GenevaF. (F) DucretAix-Marseille Université, CNRS, CNES, LAMF. DucretAix-Marseille Université, CNRS, CNES, LAMC. A. J. DuncanInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillC. (C.A.J) DuncanInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillX. (X) DupacESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloX. DupacESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloS. (S) DusiniINFN – PadovaS. DusiniAix-Marseille Université, CNRS/IN2P3, CPPMS. (S) EscoffierAix-Marseille Université, CNRS/IN2P3, CPPMS. EscoffierMax Planck Institute for Extraterrestrial PhysicsM. (M) FabriciusMax Planck Institute for Extraterrestrial PhysicsM. FarinaINAF – Istituto di Astrofisica e Planetologia SpazialiM. (M) FarinaINAF – Istituto di Astrofisica e Planetologia SpazialiR. FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaR. (R) FarinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. (F) FaustiniINAF-Osservatorio Astronomico di RomaF. FaustiniINAF-Osservatorio Astronomico di RomaS. FerriolUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822S. (S) FerriolUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822F. (F) FinelliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaF. Finelli⋆INAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaN. (N) FourmanoitAix-Marseille Université, CNRS/IN2P3, CPPMN. FourmanoitAix-Marseille Université, CNRS/IN2P3, CPPMM. FrailisINAF – Osservatorio Astronomico di TriesteM. (M) FrailisINAF – Osservatorio Astronomico di TriesteE. FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaE. (E) FranceschiINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaM. FumanaINAF-IASF MilanoM. (M) FumanaINAF-IASF MilanoS. GaleottaINAF – Osservatorio Astronomico di TriesteS. (S) GaleottaINAF – Osservatorio Astronomico di TriesteKoshy GeorgeUniversity Observatory, LMU Faculty of PhysicsK. (K) GeorgeUniversity Observatory, LMU Faculty of PhysicsB. (B) GillisInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillB GillisInstitute for Astronomy, University of Edinburgh, Royal Observatory, Blackford HillC. (C) GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaC. GiocoliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaJ Graciá-CarpioMax Planck Institute for Extraterrestrial PhysicsJ. (J) Gracia-CarpioMax Planck Institute for Extraterrestrial PhysicsA. (A) GrazianINAF – Osservatorio Astronomico di PadovaA EniaINAF – Osservatorio Astronomico di PadovaF. (F) GruppMax Planck Institute for Extraterrestrial PhysicsF. GruppMax Planck Institute for Extraterrestrial PhysicsS. (S.V.H) HauganInstitute of Theoretical Astrophysics, University of OsloS.V.H HauganInstitute of Theoretical PhysicsJ. HoarESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloJ. (J) HoarESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloW. N. HolmesJet Propulsion Laboratory, California Institute of TechnologyW. (W) HolmesJet Propulsion Laboratory, California Institute of TechnologyF HormuthFelix Hormuth EngineeringF. (F) HormuthFelix Hormuth EngineeringA. (A) HornstrupCosmic Dawn Center (DAWN)A. HornstrupCosmic Dawn Center (DAWN)K JahnkeMax-Planck-Institut für AstronomieK. (K) JahnkeMax-Planck-Institut für AstronomieM. (M) JhabvalaNASA Goddard Space Flight CenterM. JhabvalaNASA Goddard Space Flight CenterE. KeihänenE. (E) KeihänenS. (S) KermicheAix-Marseille Université, CNRS/IN2P3, CPPMS. KermicheAix-Marseille Université, CNRS/IN2P3, CPPMA. (A) KiesslingJet Propulsion Laboratory, California Institute of TechnologyA KiesslingJet Propulsion Laboratory, California Institute of TechnologyR. KohleyESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloR. (R) KohleyESAC/ESA, Camino Bajo del Castillo, s/n., Urb. Villafranca del CastilloB. KubikUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822B. (B) KubikUniversité Claude Bernard Lyon 1, CNRS/IN2P3, IP2I Lyon, UMR 5822M. (M) KunzUniversité de Genève, Département de Physique Théorique and Centre for Astroparticle PhysicsM. KunzUniversité de Genève, Département de Physique Théorique and Centre for Astroparticle PhysicsH Kurki-SuonioDepartment of PhysicsH. (H) Kurki-SuonioDepartment of PhysicsA. (A.M.C) Le BrunLaboratoire d’etude de l’Univers et des phenomenes eXtremes, Observatoire de Paris, Université PSL, Sorbonne Université, CNRSA. M. C. Le BrunLaboratoire d’etude de l’Univers et des phenomenes eXtremes, Observatoire de Paris, Université PSL, Sorbonne Université, CNRSS LigoriINAF – Osservatorio Astrofisico di TorinoS. (S) LigoriINAF – Osservatorio Astrofisico di TorinoP. B. LiljeInstitute of Theoretical Astrophysics, University of OsloP. (P.B) LiljeInstitute of Theoretical Astrophysics, University of OsloV. (V) LindholmDepartment of PhysicsV. LindholmDepartment of PhysicsI. (I) LloroSKAO, Jodrell Bank, Lower WithingtonI. LloroSKAO, Jodrell Bank, Lower WithingtonG. MainettiCentre de Calcul de l’IN2P3/CNRSG. (G) MainettiCentre de Calcul de l’IN2P3/CNRSD. MainoDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di MilanoD. (D) MainoDipartimento di Fisica “Aldo Pontremoli”, Università degli Studi di MilanoE. (E) MaioranoINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaE. MaioranoINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaO MansuttiINAF – Osservatorio Astronomico di TriesteO. (O) MansuttiINAF – Osservatorio Astronomico di TriesteO. (O) MarggrafUniversität Bonn, Argelander-Institut für AstronomieO MarggrafUniversität Bonn, Argelander-Institut für AstronomieM. MartinelliINAF-Osservatorio Astronomico di RomaM. (M) MartinelliINAF-Osservatorio Astronomico di RomaN. (N) MartinetAix-Marseille Université, CNRS, CNES, LAMN. MartinetAix-Marseille Université, CNRS, CNES, LAMF. MarulliDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaF. (F) MarulliDipartimento di Fisica e Astronomia “Augusto Righi” – Alma Mater Studiorum Università di BolognaR. MasseyR. (R) MasseyE. MedinaceliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaE. (E) MedinaceliINAF-Osservatorio di Astrofisica e Scienza dello Spazio di BolognaS. (S) MeiInternational University of BeirutS MeiCNRS-UCB International Research Laboratory, Centre Pierre Binétruy, IRL2007, CPB-IN2P3Y MellierInstitut d’Astrophysique de ParisY. MellierInstitut d’Astrophysique de Paris
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Annotatsiya
Context . The performance of the Euclid system is defined in terms of image quality metrics tuned to the weak gravitational lensing cosmological probe. The weak lensing measurement induces stringent requirements on the shape and stability of the VIS instrument system point spread function (PSF). The PSF is affected by error contributions from the telescope, the focal plane, and image motion, and it is controlled by a global error budget, with error allocations for each contributor. Aims . During development of the spacecraft, we verified through a structural-thermal-optical performance (STOP) analysis that the built and verified telescope with its spacecraft interface meets the in-orbit steady-state and transient image quality requirements under temperature-induced loads in all permitted spacecraft attitudes after all permitted attitude transitions. Based on data from its first year in orbit, we compared the performance we expected with the actual performance. Methods . For the purposes of the STOP analysis, we set up a detailed finite-element mathematical model and defined a standard set of test cases, both steady-state and transient, comprising combinations of worst-case boundary conditions. Iterations of the analysis were performed in conjunction with the major reviews of the spacecraft verification cycle. After launch, we applied the model in sensitivity analyses using realistic boundary conditions. Results . The STOP analysis addressed the interaction of all spacecraft components in transmitting temperature-induced loads that lead to optical train deformation. The results of the prelaunch analysis demonstrated that temperature-induced optical perturbations would be well below the allowable limits for all permitted observing conditions. We used the STOP analysis predictions to help interpret the measured performance of the spacecraft as a function of environmental variables during its first year in orbit. We discovered unpredicted disturbances (heat pulses from instrument operation propagating into the telescope), and unexpected sensitivities (e.g. a high dependence of the telescope baseplate temperature on the solar aspect angle; a nearly absent dependence on the azimuth angle after the attitude domain was redefined for stray light avoidance). In-orbit temperature variations are small (<300 mK) and so are their effects on the telescope structure (displacements <1 μm, rotations <1 μrad), but they are detected in the time histories of the image quality metrics and are a non-negligible factor in the point spread function stability budget demanded by the weak lensing science (Δ e < 2×10 −3 over 11 000 s). Taking everything into account, our analysis confirms the overall excellent performance of the telescope.
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