Matches in DBpedia 2016-04 for { <http://dbpedia.org/resource/Star_tracker> ?p ?o }
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- Star_tracker abstract "A star tracker is an optical device that measures the position(s) of star(s) using photocell(s) or a camera.Many models are currently available. Star trackers, which require high sensitivity, may become confused by sunlight reflected from the spacecraft, or by exhaust gas plumes from the spacecraft thrusters (either sunlight reflection or contamination of the star tracker window). Star trackers are also susceptible to a variety of errors (low spatial frequency, high spatial frequency, temporal, ...) in addition to a variety of optical sources of error (spherical aberration, chromatic aberration, etc.). There are also many potential sources of confusion for the star identification algorithm (planets, comets, supernovae, the bimodal character of the point spread function for adjacent stars, other nearby satellites, point-source light pollution from large cities on Earth, ...). There are roughly 57 bright navigational stars in common use. However, for more complex missions, entire star field databases are used to determine spacecraft orientation. A typical star catalog for high-fidelity attitude determination is originated from a standard base catalog (for example from the United States Naval Observatory) and then filtered to remove problematic stars, for example due to apparent magnitude variability, color index uncertainty, or a location within the Hertzsprung-Russell diagram implying unreliability. These types of star catalogs can have thousands of stars stored in memory on board the spacecraft, or else processed using tools at the ground station and then uploaded.".
- Star_tracker thumbnail STARS_on_EBEX_ld2012_image.png?width=300.
- Star_tracker wikiPageID "3472310".
- Star_tracker wikiPageLength "3079".
- Star_tracker wikiPageOutDegree "27".
- Star_tracker wikiPageRevisionID "691844768".
- Star_tracker wikiPageWikiLink Algorithm.
- Star_tracker wikiPageWikiLink Apparent_magnitude.
- Star_tracker wikiPageWikiLink Category:Astrodynamics.
- Star_tracker wikiPageWikiLink Category:Celestial_navigation.
- Star_tracker wikiPageWikiLink Category:Navigation.
- Star_tracker wikiPageWikiLink Category:Orbits.
- Star_tracker wikiPageWikiLink Category:Spacecraft_attitude_control.
- Star_tracker wikiPageWikiLink Category:Spaceflight_concepts.
- Star_tracker wikiPageWikiLink Celestial_navigation.
- Star_tracker wikiPageWikiLink Chromatic_aberration.
- Star_tracker wikiPageWikiLink Color_index.
- Star_tracker wikiPageWikiLink Comet.
- Star_tracker wikiPageWikiLink Ephemeris.
- Star_tracker wikiPageWikiLink Ground_station.
- Star_tracker wikiPageWikiLink Hertzsprung–Russell_diagram.
- Star_tracker wikiPageWikiLink List_of_selected_stars_for_navigation.
- Star_tracker wikiPageWikiLink Multimodal_distribution.
- Star_tracker wikiPageWikiLink Photodetector.
- Star_tracker wikiPageWikiLink Planet.
- Star_tracker wikiPageWikiLink Point_spread_function.
- Star_tracker wikiPageWikiLink Satellite.
- Star_tracker wikiPageWikiLink Spherical_aberration.
- Star_tracker wikiPageWikiLink Star.
- Star_tracker wikiPageWikiLink Star_catalogue.
- Star_tracker wikiPageWikiLink Supernova.
- Star_tracker wikiPageWikiLink United_States_Naval_Observatory.
- Star_tracker wikiPageWikiLink File:STARS_on_EBEX_ld2012_image.png.
- Star_tracker wikiPageWikiLinkText "Star Tracker".
- Star_tracker wikiPageWikiLinkText "Star tracker".
- Star_tracker wikiPageWikiLinkText "Star trackers".
- Star_tracker wikiPageWikiLinkText "attitude determination".
- Star_tracker wikiPageWikiLinkText "optical navigation".
- Star_tracker wikiPageWikiLinkText "star sensor".
- Star_tracker wikiPageWikiLinkText "star tracker".
- Star_tracker wikiPageWikiLinkText "star trackers".
- Star_tracker wikiPageWikiLinkText "such as stars".
- Star_tracker wikiPageUsesTemplate Template:Reflist.
- Star_tracker subject Category:Astrodynamics.
- Star_tracker subject Category:Celestial_navigation.
- Star_tracker subject Category:Navigation.
- Star_tracker subject Category:Orbits.
- Star_tracker subject Category:Spacecraft_attitude_control.
- Star_tracker subject Category:Spaceflight_concepts.
- Star_tracker hypernym Device.
- Star_tracker type Device.
- Star_tracker comment "A star tracker is an optical device that measures the position(s) of star(s) using photocell(s) or a camera.Many models are currently available. Star trackers, which require high sensitivity, may become confused by sunlight reflected from the spacecraft, or by exhaust gas plumes from the spacecraft thrusters (either sunlight reflection or contamination of the star tracker window).".
- Star_tracker label "Star tracker".
- Star_tracker sameAs Q3561009.
- Star_tracker sameAs Sternsensor.
- Star_tracker sameAs Viseur_dxc3xa9toiles.
- Star_tracker sameAs Stäresensor.
- Star_tracker sameAs m.01237y.
- Star_tracker sameAs m.012mgfhp.
- Star_tracker sameAs Звёздный_датчик.
- Star_tracker sameAs Q3561009.
- Star_tracker wasDerivedFrom Star_tracker?oldid=691844768.
- Star_tracker depiction STARS_on_EBEX_ld2012_image.png.
- Star_tracker isPrimaryTopicOf Star_tracker.
