4.4 Practice 3
4.4.1 Objectives
1. To study the methodology of calculation transmission functions basing on using
different models of absorption bands.
2. To calculate with the computer and to study the spectral dependence of the
transmission function in IR spectral interval.
4.4.2 Software and Set of Input Parameters
1. Tables containing parameters of the statistical model.
2. Data of gaseous absorbing components content in the atmosphere.
4.4.3 Test Questions
1. What are the assumptions concerning location and intensity of spectral absorption lines used in the considered models of absorption bands?
2. What is the square root law?
4.4.4 Sequential Steps of the Exercise Implementation
1. To study theoretical bases of gaseous absorption lines forming in the
atmosphere.
2. To specify initial data for calculating transmission functions in IR interval.
3. To compile the program for PC that implements the calculation of transmission
functions in the IR wavelength range on the basis of the teaching model of the
absorption band.
4. Build with the help of packages EXCEL, SURFER or TABLECURVE, needed
graphs to the report showing the dependence of the transmission as a function of
the parameters of the model, and integral content of the absorbing gas.
4.4.5 Requirements to the Report
Compile a concise report reflecting the principal stages, the obtained results in the
form of tables and graphs, as well as the basic conclusions. Present the text drawn
up by the program to calculate the transmission function in the IR wavelength range
based on the absorption band model given by the teacher.
46
4 Calculating Transmission Functions with Modeling Absorption Bands
4.4.1 Objectives
1. To study the methodology of calculation transmission functions basing on using
different models of absorption bands.
2. To calculate with the computer and to study the spectral dependence of the
transmission function in IR spectral interval.
4.4.2 Software and Set of Input Parameters
1. Tables containing parameters of the statistical model.
2. Data of gaseous absorbing components content in the atmosphere.
4.4.3 Test Questions
1. What are the assumptions concerning location and intensity of spectral absorption lines used in the considered models of absorption bands?
2. What is the square root law?
4.4.4 Sequential Steps of the Exercise Implementation
1. To study theoretical bases of gaseous absorption lines forming in the
atmosphere.
2. To specify initial data for calculating transmission functions in IR interval.
3. To compile the program for PC that implements the calculation of transmission
functions in the IR wavelength range on the basis of the teaching model of the
absorption band.
4. Build with the help of packages EXCEL, SURFER or TABLECURVE, needed
graphs to the report showing the dependence of the transmission as a function of
the parameters of the model, and integral content of the absorbing gas.
4.4.5 Requirements to the Report
Compile a concise report reflecting the principal stages, the obtained results in the
form of tables and graphs, as well as the basic conclusions. Present the text drawn
up by the program to calculate the transmission function in the IR wavelength range
based on the absorption band model given by the teacher.
46
4 Calculating Transmission Functions with Modeling Absorption Bands