Practical Considerations for Pointing a Binocular Telescope
Identifieur interne : 000A83 ( Main/Exploration ); précédent : 000A82; suivant : 000A84Practical Considerations for Pointing a Binocular Telescope
Auteurs : Michele D. De La Pena [États-Unis] ; David L. Terrett [Royaume-Uni] ; David Thompson [États-Unis] ; Christopher J. Biddick [États-Unis]Source :
- Proceedings of SPIE, the International Society for Optical Engineering [ 0277-786X ] ; 2010.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Observateur.
English descriptors
- KwdEn :
Abstract
The Large Binocular Telescope (LBT) consists of two 8.4-meter primary mirrors on a common mount. When the telescope is complete, to complement the two primaries there will be two 0.9-meter adaptive secondaries and two tertiary mirror flats that all work to support a variety of Gregorian focal stations, as well as prime focus. A fundamental goal of the telescope is to perform interferometric observations, and therefore, there is a critical need for the ability to co-point the individual telescopes to high precision. Further, a unique aspect of the LBT is the comparatively large range over which the optics can be adjusted which provides flexibility for the acquisition of targets. In the most general case, an observer could be performing an observation using different targets, within constraints, with different instruments on each of the two telescope sides, with different observing duty cycles. As a consequence of the binocular nature of the telescope and the number of possible observing combinations, there are unique requirements imposed on the Telescope Control System (TCS), and in particular, on the Pointing Control Subsystem (PCS). It is the responsibility of the PCS to arbitrate the pointing requests made on the two sides of the telescope by the observers, incorporate guide updates, and generate tracking trajectories for the mount and the rotators, in conjunction with providing tip/tilt demands on the subsystem controlling the optical elements, and ensure each target remains on the specified location (i.e., pointing origin) in the focal plane during an active observation. This paper describes the current design and implementation of the LBT PCS.
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De La Pena</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Large Binocular Telescope Observatory, 933 N. Cherry Ave.</s1><s2>Tucson, AZ 85721-0065</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Terrett, David L" sort="Terrett, David L" uniqKey="Terrett D" first="David L." last="Terrett">David L. Terrett</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Space Science and Technology Department, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus</s1><s2>Didcot OX11 0QX</s2><s3>GBR</s3><sZ>2 aut.</sZ></inist:fA14><country>Royaume-Uni</country><wicri:noRegion>Didcot OX11 0QX</wicri:noRegion></affiliation></author><author><name sortKey="Thompson, David" sort="Thompson, David" uniqKey="Thompson D" first="David" last="Thompson">David Thompson</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Large Binocular Telescope Observatory, 933 N. Cherry Ave.</s1><s2>Tucson, AZ 85721-0065</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Biddick, Christopher J" sort="Biddick, Christopher J" uniqKey="Biddick C" first="Christopher J." last="Biddick">Christopher J. Biddick</name><affiliation wicri:level="2"><inist:fA14 i1="01"><s1>Large Binocular Telescope Observatory, 933 N. Cherry Ave.</s1><s2>Tucson, AZ 85721-0065</s2><s3>USA</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>4 aut.</sZ></inist:fA14><country>États-Unis</country><placeName><region type="state">Arizona</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Proceedings of SPIE, the International Society for Optical Engineering</title><title level="j" type="abbreviated">Proc. SPIE Int. Soc. Opt. Eng.</title><idno type="ISSN">0277-786X</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Proceedings of SPIE, the International Society for Optical Engineering</title><title level="j" type="abbreviated">Proc. SPIE Int. Soc. Opt. Eng.</title><idno type="ISSN">0277-786X</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptive method</term><term>Flexibility</term><term>Focal plane</term><term>High precision</term><term>Interferometric observation</term><term>Localization</term><term>Mirror</term><term>Model matching</term><term>Motion control</term><term>Observer</term><term>Position control</term><term>System identification</term><term>Target detection</term><term>Target tracking</term><term>Telescope</term><term>Tilt angle</term><term>Updating</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Détection cible</term><term>Identification système</term><term>Mise à jour</term><term>Commande mouvement</term><term>Commande position</term><term>Angle inclinaison</term><term>Localisation</term><term>Télescope</term><term>Miroir</term><term>Observation interférométrique</term><term>Précision élevée</term><term>Flexibilité</term><term>Méthode adaptative</term><term>Observateur</term><term>Plan focal</term><term>Ajustement modèle</term><term>.</term><term>Poursuite cible</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Observateur</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The Large Binocular Telescope (LBT) consists of two 8.4-meter primary mirrors on a common mount. When the telescope is complete, to complement the two primaries there will be two 0.9-meter adaptive secondaries and two tertiary mirror flats that all work to support a variety of Gregorian focal stations, as well as prime focus. A fundamental goal of the telescope is to perform interferometric observations, and therefore, there is a critical need for the ability to co-point the individual telescopes to high precision. Further, a unique aspect of the LBT is the comparatively large range over which the optics can be adjusted which provides flexibility for the acquisition of targets. In the most general case, an observer could be performing an observation using different targets, within constraints, with different instruments on each of the two telescope sides, with different observing duty cycles. As a consequence of the binocular nature of the telescope and the number of possible observing combinations, there are unique requirements imposed on the Telescope Control System (TCS), and in particular, on the Pointing Control Subsystem (PCS). It is the responsibility of the PCS to arbitrate the pointing requests made on the two sides of the telescope by the observers, incorporate guide updates, and generate tracking trajectories for the mount and the rotators, in conjunction with providing tip/tilt demands on the subsystem controlling the optical elements, and ensure each target remains on the specified location (i.e., pointing origin) in the focal plane during an active observation. This paper describes the current design and implementation of the LBT PCS.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li><li>États-Unis</li></country><region><li>Arizona</li></region></list><tree><country name="États-Unis"><region name="Arizona"><name sortKey="De La Pena, Michele D" sort="De La Pena, Michele D" uniqKey="De La Pena M" first="Michele D." last="De La Pena">Michele D. De La Pena</name></region><name sortKey="Biddick, Christopher J" sort="Biddick, Christopher J" uniqKey="Biddick C" first="Christopher J." last="Biddick">Christopher J. Biddick</name><name sortKey="Thompson, David" sort="Thompson, David" uniqKey="Thompson D" first="David" last="Thompson">David Thompson</name></country><country name="Royaume-Uni"><noRegion><name sortKey="Terrett, David L" sort="Terrett, David L" uniqKey="Terrett D" first="David L." last="Terrett">David L. Terrett</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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