Results 1 to 10 of about 1,671 (165)
Remote Sensing, 2023 Nowadays, zenith telescope-based digital zenith cameras (DZC), such as the COmpact DIgital Astrometric Camera (CODIAC) and VErtical by STArs (VESTA), are used to determine highly precise astrogeodetic deflections of the vertical (DoVs).
Müge Albayrak +2 more
exaly +6 more sources
Performance analysis of Latvian zenith camera
Geodesy and Cartography, 2018 Since finalizing of design in 2016, the digital zenith camera of the University of Latvia was involved in a number of test observations as well as field observations at about 70 different sites.
Ansis Zariņš +2 more
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Digital zenith camera of the University of Latvia
Geodesy and Cartography, 2016 Design of digital zenith camera in Institute of Geodesy and Geoinformatics of the University of Latvia started in 2009. Now, after tests of a prototype, improvements of design and manufacturing of the second version, it has reached operational status ...
Ansis Zariņš +2 more
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Digital zenith camera for vertical deflection determination
Geodesy and Cartography, 2012 Recent accomplishments in advancement of accurate astrometric reference star catalogues, development of digital imaging technology, high accuracy tiltmeter technology, and geocentric coordinate availability provided by GNSS, have made possible accurate ...
Māris Abele +5 more
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Modern Determination of Vertical Deflections Using Digital Zenith Cameras [PDF]
Journal of Surveying Engineering, - ASCE, 2010 At the beginning of the 21st century, a significant technological change took place in geodetic astronomy. In Zurich and Hannover, digital zenith camera systems were developed based on digital imaging sensors (charge-coupled device) that strongly improved the degree of automation, efficiency, and accuracy of the observation of the direction of the ...
Hirt, Christian +3 more
exaly +4 more sources
THE USE OF THE AUTOMATED DIGITAL ZENITH CAMERA SYSTEM IN ISTANBUL FOR THE DETERMINATION OF ASTROGEODETIC VERTICAL DEFLECTION [PDF]
Boletim De Ciencias Geodesicas, 2019 The Digital Zenith Camera Systems (DZCSs) are dedicated astrogeodetic instruments used to obtain highly accurate astrogeodetic vertical deflection (VD) data. The first Turkish DZCS, the Astrogeodetic Camera System (ACSYS), was developed in Istanbul, Turkey in 2015.
Müge Albayrak +2 more
exaly +4 more sources
Accuracy analysis of vertical deflection data observed with the Hannover Digital Zenith Camera System TZK2-D [PDF]
Journal of Geodesy, 2007 This paper analyses the accuracy of vertical deflection measurements carried out with the Digital Zenith Camera System TZK2-D, an astrogeodetic state-of-the-art instrumentation developed at the University of Hannover. During 107 nights over a period of 3.5 years, the system was used for repeated vertical deflection observations at a selected station in
Hirt, Christian, Seeber, G.
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Monitoring and analysis of anomalous refraction using a digital zenith camera system [PDF]
Astronomy and Astrophysics, 2006 Context. Anomalous refraction is considered to be a limiting factor for ground-based astrometry in general and astrogeodetic observations in particular. Typical characteristics of anomalous refraction are basically known by means of spot-check-data, however the fluctuation is rather little studied. Aims.
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AUTOMATIC EXTRACTION OF SOLAR AND SENSOR IMAGING GEOMETRY FROM UAV-BORNE PUSH-BROOM HYPERSPECTRAL CAMERA [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 Calculating solar-sensor zenith and azimuth angles for hyperspectral images collected by UAVs are important in terms of conducting bi-directional reflectance function (BRDF) correction or radiative transfer modeling-based applications in remote sensing ...
S. Bhadra +8 more
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Separating Surface Reflectance from Volume Reflectance in Medical Hyperspectral Imaging [PDF]
DiagnosticsHyperspectral imaging has shown great promise for diagnostic applications, particularly in cancer surgery. However, non-bulk tissue-related spectral variations complicate the data analysis. Common techniques, such as standard normal variate normalization,
Lynn-Jade S. Jong +5 more
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