treatment also helps in understanding what happens in spectral filtering of 

 time series to eliminate unwanted parts of a signal. The analysis discussed 

 in Part V uses the results of Part IV to generate some simple bimodal proces- 

 ses where each mode is individually a Rayleigh process. Results can then be 

 classified purely by modal separation and ratio of modal energies. Comparison 

 of analyzed synthetic time series with model curves then reveals which 

 processes are approximately Rayleigh and under which, if any, circumstances 

 the Modified Rayleigh model excels. 



