The combination of the strapdown inertial navigation system (SINS) and the global navigation satellite system (GNSS) is an ingenious means to measure the deflection of the vertical (DOV). The error characteristics of the traditional direct difference model show that the DOV cannot be recovered by the traditional method because of the ignorance of the frequency characteristics of DOV. ... https://www.chiggate.com/devacurl-arc-angel-gel-maximum-hold-no-crunch-styler-32oz-for-cheap/