On 31 October 2020, anonymous ftp access will officially be discontinued at CDDIS. Beginning October 1, 2020, CDDIS will bandwidth limit ALL IPs using anonymous ftp to just 50KB/s and will limit simultaneous downloads to only 3 per IP address. 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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Data discovery tools

In order to facilitate easy access to CDDIS data and information, several tools are under development. At this time, the following tools are available:

CDDIS archive explorer logo

CDDIS Archive Explorer

Search the CDDIS data archive for SLR, DORIS, or GNSS data.

site log viewer logo

Site Log Viewer

Browse SLR, DORIS, or GNSS site logs by individual site or across multiple sites. The tool will be expanded soon to include VLBI site logs.

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Site Selection Tool

Search and discover CDDIS data holdings using the GSAC-WS.