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Scheduled for launch in 2029, it carries an off-axis, unobscured Cassegrain telescope that feeds photometers and spectrometers operating in the 0.5–7.8 µm band at cryogenic temperatures. The telescope architecture, including its primary, secondary, tertiary and folding mirrors, requires beam-position and orientation tolerances to be validated against potential misalignments within the Structural, Thermal, Optical and Performance Analysis framework.",{"@graph":69,"@context":127},[70,84,106],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/preliminary-analysis-of-ground-to-flight-mechanical-tolerances-of-the-ariel-mission-telescope/148785/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/preliminary-analysis-of-ground-to-flight-mechanical-tolerances-of-the-ariel-mission-telescope/148785.png","ImageObject",300,407,{"name":92,"@type":93},"Aria","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-17","2026-08-26",true,{"@type":102,"interactionType":103,"userInteractionCount":105},"InteractionCounter",{"@type":104},"ViewAction",14,{"@type":107,"mainEntity":108},"FAQPage",[109,115,119,123],{"name":110,"@type":111,"acceptedAnswer":112},"What is the main purpose of the Ariel mission described in the document?","Question",{"text":113,"@type":114},"To survey known exoplanet atmospheres using transit spectroscopy, supported by an infrared space telescope payload.","Answer",{"name":116,"@type":111,"acceptedAnswer":117},"What wavelength range and operating temperature characterize Ariel’s scientific payload?",{"text":118,"@type":114},"The payload observes in the 0.5 to 7.8 µm waveband and operates at cryogenic temperatures.",{"name":120,"@type":111,"acceptedAnswer":121},"How is the Ariel telescope configured in the document?",{"text":122,"@type":114},"It uses an off-axis, unobscured Cassegrain design with a primary parabolic mirror, a hyperbolic secondary, a parabolic tertiary and a flat folding mirror to direct the beam parallel to the optical bench.",{"name":124,"@type":111,"acceptedAnswer":125},"Why does the document discuss ground-to-flight mechanical tolerances?",{"text":126,"@type":114},"Proper instrument operation depends on position and orientation tolerances of the telescope output beam, which must be verified against possible telescope misalignments during the analysis.","https://schema.org",{"og:url":83,"og:type":129,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":131,"canonical":83},"index,follow",{"doc_id":133,"site_id":62},148785,1787786056,{"code":4,"msg":5,"data":136},{"doc_id":133,"user_id":137,"nickname":92,"user_avatar":138,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":139,"file_id":140,"file_url":141,"file_type":142,"file_size":143,"view_count":105,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":144,"language":145,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":146,"faqs":147,"seo_title":148,"seo_description":67,"update_tm":134,"read_time":149,"preview_page_count":4},2336464648322,"https://ap-avatar.wpscdn.com/avatar/2200025388227c56fec?_k=1778556882303663488","This is a copy of the published version, or version of record, available on the publisher’s website. This version does not track changes, errata, or withdrawals on the publisher’s site.  \nPreliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission  \ntelescope  \nPaolo Chioetto, Andrea Tozzi, Anna Brucalassi, Debora Ferruzzi, Andrew Caldwell, et al.  \nPublished version information:  \nCitation: P Chioetto et al. Preliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission telescope. Proc SPIE 12180 (2022): 121804R. Is in proceedings of: Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, Montréal, Québec, Canada, 17-23 Jul 2022.  \nDOI: 10.1117/12.2628900  \nCopyright 2022 Society of Photo-Optical Instrumentation Engineers (SPIE) . One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, and modification of the contents of the publication are prohibited.  \nThis version is made available in accordance with publisher policies. Please cite only the published version using the reference above. This is the citation assigned by the publisher at the time of issuing the APV. Please check the publisher’s website for any updates.  \nThis item was retrieved from ePubs, the Open Access archive of the Science and Technology Facilities Council, UK. Please contact [epublications@stfc.ac.uk](epublications@stfc.ac.uk or go to)[ or go to](epublications@stfc.ac.uk or go to) [http://epubs.stfc.ac.uk/](http://epubs.stfc.ac.uk/ for)[ for](http://epubs.stfc.ac.uk/ for)[ ](http://epubs.stfc.ac.uk/ for)[further information and policies.](further information and policies.)  \nPROCEEDINGS OF SPIE  \n[SPIEDigitalLibrary.org/conference-proceedings-of-spie](SPIEDigitalLibrary.org/conference-proceedings-of-spie)  \nPreliminary analysis of ground-toflight mechanical tolerances of the Ariel mission telescope  \nPaolo Chioetto, Andrea Tozzi, Anna Brucalassi, Debora Ferruzzi, Andrew Caldwell, et al.  \nPaolo Chioetto, Andrea Tozzi, Anna Brucalassi, Debora Ferruzzi, Andrew Caldwell, Martin Caldwell, Fausto Cortecchia, Emiliano Diolaiti, Paul Eccleston, Elisa Guerriero, Matteo Lombini, Giuseppe Malaguti, Giuseppina Micela, Emanuele Pace, Enzo Pascale, Raffaele Piazzolla, Giampaolo Preti, Mario Salatti, Giovanna Tinetti, Elisabetta Tommasi, Paola Zuppella,\"Preliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission telescope,\" Proc. SPIE 12180, Space Telescopes and Instrumentation 2022: Optical, Infrared, and Millimeter Wave, 121804R (27 August 2022); doi: 10.1117/12.2628900  \nEvent: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada  \nDownloaded From: [https://www.spiedigitallibrary.org/conference-proceedings-of-spie on](https://www.spiedigitallibrary.org/conference-proceedings-of-spie on) 02 Sep 2022 Terms of Use: [https://www.spiedigitallibrary.org/terms-of-use](https://www.spiedigitallibrary.org/terms-of-use)  \nPreliminary analysis of ground-to-flight mechanical tolerances  \nof the Ariel mission telescope  \nPaolo Chioetto*a,b,c , Andrea Tozzid , Anna Brucalassid , Debora Ferruzzid , Andrew Caldwellf, Martin Caldwellf, Fausto Cortecchiae , Emiliano Diolaitie , Paul Ecclestonf, Elisa Guerrierom , Matteo Lombinie , Giuseppe Malagutie , Giuseppina Micelag , Emanuele Paceh , Enzo Pascalei , Raffaele Piazzollak , Giampaolo Pretih , Mario Salattik , Giovanna Tinettil , Elisabetta Tommasik ,  \nand Paola Zuppellac  \naCNR-Istituto di Fotonica e Nanotecnologie di Padova, Via Trasea 7, 35131 Padova, Italy b Centro di Ateneo di Studi e Attività Spaziali “Giuseppe Colombo”-CISAS, Via Venezia 15,  \n35131 Padova, Italy  \ncINAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy dINAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Firenze, Italy eINAF-Osservatorio di Astrofisica e S","cbCaij8Fy6ygBSAL","https://ap.wps.com/l/cbCaij8Fy6ygBSAL","pdf",371721,13,"English","# Abstract\n## Mission and payload overview\n## Telescope optical architecture\n## Tolerance requirements and validation context","[{\"question\":\"What is the main purpose of the Ariel mission described in the document?\",\"answer\":\"To survey known exoplanet atmospheres using transit spectroscopy, supported by an infrared space telescope payload.\"},{\"question\":\"What wavelength range and operating temperature characterize Ariel’s scientific payload?\",\"answer\":\"The payload observes in the 0.5 to 7.8 µm waveband and operates at cryogenic temperatures.\"},{\"question\":\"How is the Ariel telescope configured in the document?\",\"answer\":\"It uses an off-axis, unobscured Cassegrain design with a primary parabolic mirror, a hyperbolic secondary, a parabolic tertiary and a flat folding mirror to direct the beam parallel to the optical bench.\"},{\"question\":\"Why does the document discuss ground-to-flight mechanical tolerances?\",\"answer\":\"Proper instrument operation depends on position and orientation tolerances of the telescope output beam, which must be verified against possible telescope misalignments during the analysis.\"}]","Preliminary analysis of ground-to-flight mechanical tolerances of the Ariel mission telescope | PDF",33]