Application And Development Of Passive Remote Sensing FTIR

Remote sensing FTIR technology is an accurate, sensitive, and high signal to noise ratio method which does not need point sampling and developed very fast in the last decade. The followings are the major content of this paper:1. Calibration of the Instrument Response Function in Passive Remote Sensing FTIR MeasurementRemote sensing FTIR is more privilege than the other optic remote sensing technology in that it can provide the absolute spectral energy of the emission sources. However, obtaining such an absolute spectral energy distribution needs the calibration of the system. Traditional point of view about system calibration is that the result is related to the frequency and the blackbody temperature. While in this paper, the signal amplitude received by the FTIR is also concerned for the system calibration and was testified by the response function calibration of the Bruker EQUINOX 55 remote sensing FTIR. Results illustrate that under different experimental conditions, the instrument response function varies not only with the frequency, the temperature of the blackbody but also with the signal amplitude received by the infrared instrument. When the signal amplitude received by the FTIR interferometer is larger, the response function is increased with the increasing of the blackbody temperature while decreased with the increasing of the blackbody temperature when the signal amplitude is smaller. So, in passive FTIR measurement, the temperature and the emission signal amplitude of the source must be observed carefully in order to get satisfied instrument response function.2. Investigation of Fine Structure and Its Applications on the Remote Sensing FTIR MeasurementThrough judicious utilization of the spectral running number ' m', the emission spectral fine structure temperature measurement method was improved to make temperature estimation more convenient and simpler. At the same time, the rapid scan method of remote sensing FTIR was developed so that we can get 8 spectra in one second which means the time resolution is 0.125 second. And the emission spectra of the combustion process of a double-based solid propellant were recorded with time resolution of 0.125...