DIFFERENTIAL METHOD FOR DETERMINING VERTICAL PROFILE OF GASES CONCENTRATION IN ATMOSPHERE Russian patent published in 2015 - IPC G01W1/00 

FIELD: instrumentation.

SUBSTANCE: natural radiation of the atmosphere and background is measured for some set of frequencies in area of the line of absorption of the measured gas. The design values of the natural radiation of the atmosphere and background are calculated based on the a priori or standard data on the vertical profile of temperature, atmosphere pressure, concentration of the measured gas, background radiation. Deviation of the measured gas profile from the standard is determined according to difference between the measured and calculated values of the natural radiation at the selected set of frequencies. To get data on the concentration of the measured gas at the given height the difference of natural radiation (differential signal) is measured at the first pair of frequencies located on the low frequency slope of the absorption line of the measured gas that corresponds to the set height. The same difference is measured at the second pair of frequencies located on the high frequency slope of the same line. Based on the deviation of the linear combination of the difference (differential) signals from its design value for the standard atmosphere and background the gas concentration is calculated at the given height.

EFFECT: higher measurement accuracy.

5 dwg, 1 tbl