METHOD AND DEVICE FOR DETECTING DISPERSIVE EFFECTS ON A MEASUREMENT

摘要

The invention relates to a method and to a device for detecting dispersive effects on the measurement along a line of sight according to the principle of phase or pulse modulation. The propagation times of electromagnetic radiation of at least two different carrier wavelengths are measured along a path. A first carrier wavelength in a wavelength range without molecular or atomic absorption of atmospheric gases (4) is selected and a second carrier wavelength in a wavelength range with molecular or atomic absorption, preferably in a spectral range with effective spectral lines, of atmospheric gases (4) is selected, and the dispersive effects are calculated from at least two measured propagation times of the electromagnetic radiation.