===== Wind Calibration and Processing Programs =====

All the calibration and processing software module's described below are executed from the shell prompt.  Type the name of the processing module to get a list of input parameters for that program.  Each software module is started with a "csh" script that calls an IDL subroutine.    
   
== alpha_cal ==
Calibration routine to determine the alpha angle calibration coefficients.
== beta_cal  ==
Calibration routine to determine the beta angle calibration coefficients.
== hoffset_cal ==
Calibration routine to determine the offset between the aircraft heading angle and track angle.
== winds_cal ==
Calibration routine to determine the pitot nose and pitot wing calibration coefficients.  Uses reverse tracks flight data.
== winds_file ==
Data Level 3 processing module used to create the "*.wind.txt" and  "*.SBET.winds.txt" data file.

===== Library Subroutines =====

The "citation_constants" subroutine is used by all the calibration and processing subroutines to obtain the calibration coefficients.  When ever new calibration coefficients are computed they need to be updated in the "citation_constants.pro" subroutine.  The flight date is used by the "citation_constants.pro" subroutine to determine the correct calibration coefficient.

To calculate all new coefficients, start with "alpha_cal", determine new alpha angle calibration coefficients, update "citation_constants.pro", run "beta_cal", update "citation_constants.pro", run "wind_cal", update "citation_constants.pro".  Repeat the above procedure until the calibration coefficients converge.