Gnss data download. downloadGnssDataSpecificDays to downlaod data Access GNSS data and services provided by the International GNSS Service (IGS) for scientific research and practical applications. gz and o. Access to the RINEX formated files is given by our HTTP and FTP server. GNSS Data Observational, navigational and meteorological data from more than 500 world-wide stations are available for download. Z or o. In addition to direct file server access, web based graphical user interfaces, command line clients, and web services are available. Use jupyter notebook or normal python, and import this as import gnss_data_downloader as gnss. Download the gnss_data_downloader. py file from here and put it in a directory where you want to download your n. Access daily broadcast ephemeris files from site-specific broadcast navigation data transmitted by Global Navigation Satellite System (GNSS) sites.