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Water Vapour Radiometers for the Australia Telescope Compact Array

  • Balthasar T. Indermuehle (a1) (a2), Michael G. Burton (a2) and Jonathan Crofts (a3)

Abstract

We have developed water vapour radiometers (WVRs) for the Australia Telescope Compact Array that are capable of determining signal path-length fluctuations by virtue of measuring small temperature fluctuations in the atmosphere using the 22.2-GHz water vapour line for each of the six antennae. By measuring the line-of-sight variations of the water vapour, the induced path excess and thus the phase delay can be estimated and corrections can then be applied during data reduction. This reduces decorrelation of the source signal. We demonstrate how this recovers the telescope's efficiency as well as how this improves the telescope's ability to use longer baselines at higher frequencies, thereby resulting in higher spatial resolution. A description of the WVR hardware design, their calibration, and water vapour retrieval mechanism is given.

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Copyright

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References

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Bremer, M. 1997, Phase Monitoring with Cloud Correction near the 22.2 GHz Water Line. IRAM Working Report No 247
Carilli, C. L., Carlstrom, J. E., & Holdaway, M. A. 1999, ASPC, 180, 565
Cooper, D. N., James, G. L., Parsons, B. F., & Yabsley, D. E. 1992, J. Electr. Electron. Eng. Aust., 12, 121
Indermuehle, B. 2011, PhD thesis, UNSW
Kraus, J. D. 1966, Radio Astronomy (New York: McGraw-Hill)
Liebe, Hans J. 1985, Radio Sci., 20, 1069
Pardo, J. R., Cernicharo, J., & Serabyn, E. 2001, IEEE Trans. Antennas Propag., 49, 1683
Ruze, J. 1966, Proc. IEEE, 54, 633
Tahmoush, D. A., & Rogers, Alan E. E. 2000, Radio Sci., 35, 1241
Thompson, A. R., Moran, J. M., & Swenson, G. W. Jr. 2001, Interferometry and Synthesis in Radio Astronomy (2nd edn.; Wiley-VCH Verlag GmbH & Co. KHaA: Weinheim)
Torrence, C., & Compo, G. P. 1998, Bull. Am. Meteorol. Soc., 79, 61
Ulaby, F., Moore, R., & Fung, A. 1981, Microwave Remote Sensing Fundamentals and Radiometry, Vol. 1. (1st edn.; Norwood, MA: Artech House)
Wilson, W. E. et al. 2011, MNRAS 416, 832

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