On 31 October 2020, anonymous ftp access will officially be discontinued at CDDIS. Beginning August 10, 2020, CDDIS will bandwidth limit ALL IPs using anonymous ftp to just 250KB/s transfer rates. CDDIS is STRONGLY recommending all users begin to transition to using alternate method of access to the CDDIS archive. Examples of alternate methods can be found at: https://cddis.nasa.gov/Data_and_Derived_Products/CDDIS_Archive_Access.html.

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Real-time data

The CDDIS has configured dedicated servers for receipt and transmission of real-time GNSS data and product streams in support of the IGS Real Time Service. The CDDIS has installed and tested the required real-time streaming software (NTRIP, Networked Transport of RTCM via Internet Protocol). The available product streams consist of GNSS orbit and clock corrections, which enable varied applications such as precise point positioning (PPP). In the near term, the CDDIS plans to continue testing and coordination with the RTS. Future plans include capturing incoming data streams for generation of high-rate data files from real-time stations.

More information and registration details on the real-time GNSS streams available from the CDDIS can be viewed on the CDDIS Caster Description webpage.