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.

Calibration routine to determine the alpha angle calibration coefficients.

Calibration routine to determine the beta angle calibration coefficients.

Calibration routine to determine the offset between the aircraft heading angle and track angle.

Calibration routine to determine the pitot nose and pitot wing calibration coefficients. Uses reverse tracks flight data.

Data Level 3 processing module used to create the “*.wind.txt” and “*.SBET.winds.txt” data file.

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.