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

This dataset consists of ground-based Global Navigation Satellite System (GNSS) Beidou 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 Beidou broadcast ephemeris files contain one day of Beidou 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.

本数据集由美国宇航局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）北斗广播星历数据（每日文件）构成。GNSS技术能够提供具有全球覆盖能力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GLONASS的数据。自2011年起，CDDIS的GNSS档案纳入了其他GNSS数据，包括欧洲的伽利略系统、中国的北斗系统、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以及全球卫星增强系统/SBASs，这些系统在卫星星座、轨道和信号结构方面与美国GPS相似。每日北斗广播星历文件包含全球固定地面接收网络中某一天内北斗广播导航数据，以RINEX格式存储，每个站点对应一个文件。有关这些数据的更多信息，可访问CDDIS网站：https://cddis.nasa.gov/Data_and_Derived_Products/GNSS/daily_30second_data.html。