Malabo, it's as HC says: Raw Data is the information coming straight from the ground based navaid, through the onboard receiver, and appearing on your display, either using the bearing pointers or CDI. It would exclude Flight Director processed information, even if the FD was coupled to a ground navaid.
TSO-145 also allows LPV (Localiser Precision, Vertical guidance) approaches, as well as being sole aid. Having said that, despite only being TSO-129'd, the UNS-1 uses angular scaling inside the final approach (rather than fixed distance scaling) fix when used for an NPA: hence the expression 'Pseudo-ILS' that Sikorsky use.
Last edited by 212man; 15th Jun 2007 at 09:27.