According to the trajectory characteristics of hypersonic boost-glide vehicles. a tightly coupled integrated navigation algorithm for hypersonic vehicles based on the launch-centered Earth-fixed (LCEF) frame is proposed. First. the strapdown inertial navigation mechanization algorithm and discrete update algorithm in the LCEF frame are introduced. https://www.chiggate.com/grahams-natural-c-eczema-dermatitis-relief-cream-120g-supply/