双色和三色观测在干涉测量中的应用

Application of Observations with Two or Three Colours to Interferometry

介绍双波段观测在射电干涉测量和光学干涉测量中消除电离层或大气湍流影响的原理和公式。并给出三色观测消除水汽对光干涉测量影响的公式。双色和三色观测对提高光干涉仪测定天体位置的精度有重要作用。

The observations with two bands in radio interferometry could eliminate the effect of ionosphere on the phase measurement. Also, the observations with two-colour (wavelength) in optical interferometry could eliminate the effect of turbulence on the star position measurement, and the remained effect of the fluctuation of the water vapour in the atmosphere could be eliminated by using threc-colour(wavelength) observations.