读取gps数据，从中获得星点数据，卫星参数-Read the gps data and gain a star data, satellite parameters

A*搜寻算法俗称A星算法。A*算法是比较流行的启发式搜索算法之一，被广泛应用于路径优化领域[。它的独特之处是检查最短路径中每个可能的节点时引入了全局信息，对当前节点距终点的距离做出估计，并作为评价该节点处于最短路线上的可能性的量度。(A * search algorithm commonly known as A Star algorithm. A * algorithm is one of the more popular heuristic search algorithms and is