Zenith cameras for this kind of measurements have been developed or are being developed by a number of research groups. The paper describes a research project by Institute of Geodesy and Geoinformatics of the University of Latvia, intended to design a portable digital zenith camera for vertical deflection determination with 0.1" expected accuracy.
Russian camera maker Zenit's new digital camera, the Zenit M, has been released in the US. The camera's exterior was designed in Russia but the camera was built at the luxury German camera maker Leica's Wetzlar plant. It is the first camera made by the Russian manufacturer since the last of its film SLRs in 2005.
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A zenith camera combines an optical lens (about 10–20 cm aperture) with a digital image sensor ( CCD) in order to image stars near the zenith. Electronic levels (tilt sensors) serve as a means to point the lens towards zenith. Zenith cameras are generally mounted on a turnable platform to allow star images to be taken in two camera directions ...
Digital models. During the 2018 Photokina expo, Zenit announced that it was resuming camera and lens production for the M-mount, as well as for unspecified Nikon and Canon mounts in 2019. Zenit M. The digital Zenit M camera was released in a limited edition set with the Zenitar-M 35mm F/1.0 lens.
The portable digital zenith camera (DZC) VESTA (VErtical by STArs) determines the deflection of vertical (DoV) components as the difference between the direction to the ellipsoidal zenith (calculated from reference star observations, fixing precise time moment and site coordinates) and the direction of the plumb line, which is determined with a sensitive tiltmeter.
The design of digital zenith camera was started in 2010 by Institute of Geodesy and Geoinformatics. Since then the prototype of digital zenith camera has been developed.
Digital Image Capture. The central piece of the digital zenith camera is the CCD sensor KAF 1602E with 1530 x 1020 image elements, which enables the capture of stars up to an apparent magnitude of 14 mag. Spread out across the entire celestial sphere over …
The Zenit was an SLR camera that was inspired by the Zorki rangefinder design. After being launched in 1953, the Zenit went on to sell millions of cameras …
Applied Research Laboratories, The University of Texas at Austin (ARL:UT) has developed a digital zenith camera system for the purpose of measuring the gravitational deflection of the vertical (DoV). This portable instrument is capable of determining the DoV at a location to 0.1 arc-second accuracy in approximately one hour of automated observations.
The digital zenith camera VESTA (VErtical by STArs) was designed by the Institute of Geodesy and Geoinformatics (GGI) of the University of Latvia and completed in 2016. Since that more than 300 terrestrial vertical deflection measurements were observed in the territory of Latvia. These observations were post-processed by the GGI developed ...
Key words: digital zenith cameras, vertical deflections, geodetic astronomy, geoid, quasigeoid SUMMARY Over recent years, significant progress has been made in astrogeodetic research with the development of digital zenith camera systems (DZCSs) at ETH Zurich, Switzerland, and the University of Hanover, Germany.
The design of digital zenith camera was started in 2010 by Institute of Geodesy and Geoinformatics. Since then the prototype of digital zenith camera has been developed. Now, after improvements of ...
