Novel method to compare tropospheric path delay fluctuations with 22-GHz water vapor line emissions

Yoshiharu Asaki; Hideyuki Kobayashi; Naoki Hagiwara; Masato Ishiguro

doi:10.1117/12.390456

3 July 2000 Novel method to compare tropospheric path delay fluctuations with 22-GHz water vapor line emissions

Yoshiharu Asaki, Hideyuki Kobayashi, Naoki Hagiwara, Masato Ishiguro

Proceedings Volume 4015, Radio Telescopes; (2000) https://doi.org/10.1117/12.390456
Event: Astronomical Telescopes and Instrumentation, 2000, Munich, Germany

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.

Citation Download Citation

Yoshiharu Asaki, Hideyuki Kobayashi, Naoki Hagiwara, and Masato Ishiguro "Novel method to compare tropospheric path delay fluctuations with 22-GHz water vapor line emissions", Proc. SPIE 4015, Radio Telescopes, (3 July 2000); https://doi.org/10.1117/12.390456

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