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dc.contributor.authorHawat, T.
dc.contributor.authorStephen, T.M.
dc.contributor.authorDe Maziere, M.
dc.contributor.authorNeefs, E.
dc.date2003
dc.date.accessioned2017-05-03T11:14:10Z
dc.date.available2017-05-03T11:14:10Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/5166
dc.descriptionA heliostat has been designed and built for use in optical remote sensing of the atmosphere. The heliostat uses two flat mirrors to track the sun and direct the sunlight to optical instruments. A stepper motor driven horizontal turntable is used to track the sun in azimuth and support an elevation assembly and a mechanical tower. The stepper motor driven elevation assembly drives an acquisition mirror that tracks the sun in elevation. This mirror directs the solar beam to a secondary mirror fixed on the mechanical tower. The secondary mirror then directs the solar beam along the axis of the tracker for use in measurements. A sensitive, high resolution CCD camera, receives a small part of the solar beam to analyze for fine servo-control. Ground based tests have demonstrated this instrument's tracking capability for the sun, the moon, stars and for long pathlength sources. Presently, this system is coupled with a high-resolution Brucker 120M spectrometer used to obtain solar absorption spectra. The heliostat directs the solar radiation along the spectrometer optical axis. The pointing precision was measured to be better than 0.5 arcsec. A description of the heliostat is presented, as well as the results of ground tests.
dc.languageeng
dc.titleHigh precision heliostat for long path light tracking
dc.typeConference
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeCameras
dc.subject.freeCharge coupled devices
dc.subject.freeData acquisition
dc.subject.freeHeliostats (instruments)
dc.subject.freeMirrors
dc.subject.freeOptical systems
dc.subject.freeRemote sensing
dc.subject.freeSolar absorbers
dc.subject.freeSpectroscopic analysis
dc.subject.freeBrucker 120M spectrometer
dc.subject.freeSolar beams
dc.subject.freeAutomatic target recognition
dc.source.titleProceedings of SPIE 5082, Acquisition, Tracking, and Pointing XVII
dc.source.volume5082
dc.source.page13-20
Orfeo.peerreviewedNo
dc.identifier.doi10.1117/12.499060
dc.identifier.scopus2-s2.0-0242719979


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