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  • Vilnius Gediminas Technical University  (4)
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  • Vilnius Gediminas Technical University  (4)
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  • 1
    Online Resource
    Online Resource
    DIGITAL ZENITH CAMERA FOR VERTICAL DEFLECTION DETERMINATION
    Vilnius Gediminas Technical University ; 2012
    In:  Geodesy and Cartography Vol. 38, No. 4 ( 2012-12-21), p. 123-129
    Details
    In: Geodesy and Cartography, Vilnius Gediminas Technical University, Vol. 38, No. 4 ( 2012-12-21), p. 123-129
    Abstract: 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, fast and automated determination of vertical deflections using astrometric methods. Zenith cameras for this kind of measurements have been developed or are being developed by several research groups. The paper describes a research project by Institute of Geodesy and Geoinformation, intended to design a portable digital zenith camera for vertical deflection determination with 0.1” expected accuracy. Camera components are described, proposed data processing algorithm and preliminary results, obtained with prototype instrument, are presented.
    Type of Medium: Online Resource
    ISSN: 2029-6991 , 2029-7009
    URL: Article
    DOI: 10.3846/20296991.2012.755324
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2012
    detail.hit.zdb_id: 2737682-5
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    Online Resource
  • 2
    Online Resource
    Online Resource
    PARAMETERS FOR AUTOMATED STAR IDENTIFICATION
    Vilnius Gediminas Technical University ; 2014
    In:  Geodesy and cartography Vol. 40, No. 4 ( 2014-12-16), p. 163-170
    Details
    In: Geodesy and cartography, Vilnius Gediminas Technical University, Vol. 40, No. 4 ( 2014-12-16), p. 163-170
    Abstract: The determination of parameters for identifying stars sensed by charge-coupled device (CCD) is discussed. Numerical experiments are summarized which support the parameter space bound estimation practicality of the proposed star pattern recognition and identification by matching with coordinate list in star catalogue. The parameter analysis performed to apply them for proper identification algorithm which is developed and used at the Institute of Geodesy and Geoinformatics. This algorithm is applied for identification of large volume star sets.
    Type of Medium: Online Resource
    ISSN: 2029-6991 , 2029-7009
    URL: Article
    DOI: 10.3846/20296991.2014.987457
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2014
    detail.hit.zdb_id: 2737682-5
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  • 3
    Online Resource
    Online Resource
    FIELD TESTS OF ASTROMETRIC SUBSYSTEM
    Vilnius Gediminas Technical University ; 2016
    In:  Geodesy and cartography Vol. 42, No. 1 ( 2016-04-08), p. 1-6
    Details
    In: Geodesy and cartography, Vilnius Gediminas Technical University, Vol. 42, No. 1 ( 2016-04-08), p. 1-6
    Abstract: The paper presents results of astrometric subsystem’s functionality tests for space object laser ranging and astrometric position determination device, which is under construction in the Institute of Geodesy and Geoinformatics (GGI) of the University of Latvia. Properties of hardware performance for astrometric image acquisition were evaluated and optimal parameters have been selected. Software for image processing and calculation of instrument orientation was tested and adjustments have been made for real-time operation support. Object tracking properties were evaluated, and mount error model parameters were calculated, using test measurements.
    Type of Medium: Online Resource
    ISSN: 2029-6991 , 2029-7009
    URL: Article
    DOI: 10.3846/20296991.2016.1168029
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2016
    detail.hit.zdb_id: 2737682-5
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  • 4
    Online Resource
    Online Resource
    ON REFERENCE STAR RECOGNITION AND IDENTIFICATION
    Vilnius Gediminas Technical University ; 2014
    In:  Geodesy and cartography Vol. 40, No. 4 ( 2014-12-16), p. 143-147
    Details
    In: Geodesy and cartography, Vilnius Gediminas Technical University, Vol. 40, No. 4 ( 2014-12-16), p. 143-147
    Abstract: The paper deals with a research in the area of automation of positional star observations. In order to fully employ recent progress in imaging technologies, star image recognition and reference star identification process should gain comparable level of automation. A software package for this purpose has been developed in the Institute of Geodesy of the University of Latvia. It is capable of near-real-time image processing, star identification and astrometric position determination.
    Type of Medium: Online Resource
    ISSN: 2029-6991 , 2029-7009
    URL: Article
    DOI: 10.3846/20296991.2014.987456
    Language: Unknown
    Publisher: Vilnius Gediminas Technical University
    Publication Date: 2014
    detail.hit.zdb_id: 2737682-5
    Location Call Number Limitation Availability
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    Online Resource
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