Austrasien wrote:
Doppler inertial navigation is significantly less accurate, especially given the missiles significant flight time to maximum range.
True, but the missile only periodically has to use TERCOM as a reference. The point of TERCOM after all, like astrotracking and GPS, is to correct for the spin drift in the gyros. Make the INS accurate enough with modern strapdown laser ring gyros and accelerators all and the rate at which it had to be corrected can be made pretty small, maybe only a handful of times in the entire flight (10 max for the ACM according to the paper).