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Proceedings Paper

Novel method to compare tropospheric path delay fluctuations with 22-GHz water vapor line emissions
Author(s): Yoshiharu Asaki; Hideyuki Kobayashi; Naoki Hagiwara; Masato Ishiguro
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Paper Abstract

Tropospheric phase fluctuation due to the water vapor content is one of difficult problems which degrades imaging performances of radio interferometry. One of the potential solutions is differential radiometry observations to measure the differential water vapor content along the line of sights. We developed a 22-GHz-line radiometer to be mounted on a ground data-link antenna which supplies the timing reference signal for a space VLBI satellite, HALCA. This system will allow us to compare directly the atmospheric phase fluctuation with the water vapor content along a single line of sight measured by the radiometer.

Paper Details

Date Published: 3 July 2000
PDF: 8 pages
Proc. SPIE 4015, Radio Telescopes, (3 July 2000); doi: 10.1117/12.390456
Show Author Affiliations
Yoshiharu Asaki, Institute of Space and Astronautical Science (Japan)
Hideyuki Kobayashi, National Astronomical Observatory (Japan)
Naoki Hagiwara, Univ. of Electro-Communications (Japan)
Masato Ishiguro, Nobeyama Radio Observatory (Japan)


Published in SPIE Proceedings Vol. 4015:
Radio Telescopes
Harvey R. Butcher, Editor(s)

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