A High Efficient Method of Downloading GNSS Data Automaticly

 Traditional method of GNSS data download wastes too much time in loging in and out the empty folder. To solve this problem, this paper proposes an improved method. The principle of this method is obtaining the filename of the GNSS data which is stored under the path of ftp in advance, and then using the data download command to download the data. This method can avoid the disadvantage of the traditional method and improve the efficiency of data downloaded greatly. It can be seen from the results of the experiment that this method can save about 34 min in downloading data from IGS and 17 min form MGEX in average comparing to the traditional method. Thus, this method can actually improve the efficiency of data download.