Ground-Based Global Navigation Satellite System (GNSS) Galileo Broadcast Ephemeris Data (daily files) from NASA CDDIS

This dataset consists of ground-based Global Navigation Satellite System (GNSS) Galileo Broadcast Ephemeris Data (daily files) from the NASA Crustal Dynamics Data Information System (CDDIS). GNSS provide autonomous geo-spatial positioning with global coverage. GNSS data sets from ground receivers at the CDDIS consist primarily of the data from the U.S. Global Positioning System (GPS) and the Russian GLONASS. Since 2011, the CDDIS GNSS archive includes data from other GNSS (Europe’s Galileo, China’s Beidou, Japan’s Quasi-Zenith Satellite System/QZSS, the Indian Regional Navigation Satellite System/IRNSS, and worldwide Satellite Based Augmentation Systems/SBASs), which are similar to the U.S. GPS in terms of the satellite constellation, orbits, and signal structure. The daily Galileo broadcast ephemeris files contain one day of Galileo broadcast navigation data in RINEX format from a global permanent network of ground-based receivers, one file per site. More information about these data is available on the CDDIS website at https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/daily_30second_data.html.

本数据集由美国国家航空航天局（NASA）地壳动力学数据信息系统（CDDIS）提供的地面全球导航卫星系统（GNSS）伽利略广播星历数据（每日文件）组成。GNSS系统提供具有全球覆盖范围的自主地理空间定位服务。CDDIS的地面接收器GNSS数据集主要包含来自美国全球定位系统（GPS）和俄罗斯格洛纳斯（GLONASS）的数据。自2011年起，CDDIS的GNSS档案包括了来自其他GNSS（欧洲的伽利略、中国的北斗、日本的准地球静止卫星系统/QZSS、印度的区域导航卫星系统/IRNSS以及全球卫星基于增强系统/SBASs）的数据，这些系统在卫星星座、轨道和信号结构方面与美国GPS相似。每日伽利略广播星历文件包含来自全球固定地面接收器网络一天的伽利略广播导航数据，每个站点一个文件。更多关于这些数据的信息可在CDDIS网站https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/daily_30second_data.html上获取。