發送短信 : GNSS signal tracking under weak signal or high dynamic environment

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