發送短信 : Land-vehicle mems INS/GPS positioning during GPS signal blockage periods

  ______    _____     _____    _    _   __    __  
 /_   _//  |  ___||  /  ___|| | || | || \ \\ / // 
   | ||    | ||__   | // __   | || | ||  \ \/ //  
  _| ||    | ||__   | \\_\ || | \\_/ ||   \  //   
 /__//     |_____||  \____//   \____//     \//    
 `--`      `-----`    `---`     `---`       `