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1976 to present data comprises full-rate satellite laser ranging observations, including all valid satellite returns, transmitted daily and consolidated into monthly, satellite-specific files. The NASA Crustal Dynamics Data Information System (CDDIS) archives and provides this dataset, which supports both engineering evaluation and scientific research. Data formats evolved from ILRS/CSTG (1976-2011) to CRD format, which became operational in January 2011.
License is listed as 'other-license-specified' on Data.gov but is 'None' on NASA Earthdata; users must verify terms. Data is provided in BIN, ISO, and HTML file formats.