## The PAH/RAH initialization routine PRAHINIT

The Matlab program PRAHINIT can be used to initialize the Pitch Attitude Hold and Roll Attitude Hold simulation models PAH, RAH, and PAHRAH. This routine needs to be run before starting a new simulation of these systems.

The program can be started by typing `prahinit` at the Matlab command-line, or by double-clicking the PRAHINIT button in the PAH/RAH systems. A menu will be displayed in the command window; the user is expected to walk through all menu options in the shown order and enter all required parameter values. PRAHINIT calls several subroutines; see the source-code of PRAHINIT.M in the FDC directory APILOT for more details.