Ground-Based Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) Ionospheric Product from NASA CDDIS

Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) Ionospheric Product from the NASA Crustal Dynamics Data Information System (CDDIS). DORIS is a dual-frequency Doppler system consisting of a receiver flying aboard a satellite and a globally distributed network of ground beacons. The DORIS receiver on-board the orbiting satellite tracks the dual-frequency radio signals transmitted by the network of ground beacons and generates the DORIS data. A measurement is made of either the Doppler shift or absolute phase as the satellite’s orbit moves over the ground-based beacon. DORIS data records contain a time-tagged range-rate measurement with associated ancillary information. DORIS observations from a global network can be utilized for a variety of products. Analysis Centers (ACs) of the International DORIS Service (IDS) retrieve DORIS data on a regular basis to compute various DORIS products from data generated by the DORIS beacons supporting the IDS network. These products include ionospheric products providing time derivatives of the Total Electron Content (TEC) obtained from the DORIS doppler data. These DORIS derived ionospheric products are available in text format.

美国国家航空航天局（NASA）地壳动力学数据信息系统（CDDIS）提供的多普勒测轨与无线电定位综合卫星（DORIS）电离层产品。DORIS为一套双频多普勒系统，由搭载于卫星上的接收机和全球分布的地面信标网络组成。卫星上的DORIS接收机跟踪地面信标网络传输的双频无线电信号，并生成DORIS数据。当卫星的轨道经过地面信标时，测量其多普勒频移或绝对相位。DORIS数据记录包含带有时标的距离变化率测量以及相关的辅助信息。国际DORIS服务（IDS）的分析中心定期检索DORIS数据，以计算由支持IDS网络的DORIS信标生成的一系列DORIS产品。这些产品包括提供从DORIS多普勒数据中获取的总电子含量（TEC）时间导数的电离层产品。这些由DORIS推导的电离层产品以文本格式提供。