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ALMA Memo # 514

Saturation Correction With Atmospheric Fluctuations

A. Bacmann and S. Guilloteau

Abstract: We revisit memo 461 by taking into account the fluctuations of J_sky. A calibration precision of 1% is achievable at millimeter wavelenghts. For sub-millimeter wavelengths a precision of 2 to 3% at most can be achieved. In order to obtain such precisions, receiver stability is essential. These numbers should however be taken with some caution as the atmospheric fluctuations may differ from the values assumed here and the calibration device switch faster. This memo shows that noise may not be the limiting factor in the calibration process.

View a pdf version of ALMA Memo #514.

Last modified: 2005-02-20