The diagram below shows the organization of each volume, starting from the root of the compact disc. The remaining directories at the root level contain data files and detached PDS labels. All data files on the disc are accompanied by detached PDS labels, which describe their contents. PDS TEXT objects have attached labels. The label fully describes the format and content of its associated file.
Some data files contain more than one structure.
Both models are based on Mariner 9, Viking, and MGS data. Each file gives Doppler residuals, spline fit residuals, and inferred spacecraft acceleration as a function of time with respect to the 75x75 gravity model. These data were collected under auspices of the Mars Global Surveyor Project. G. Leonard Tyler of Stanford University was the Radio Science Team Leader. Members of the Team and its support elements involved in data acquisition and validation included Patricia Priest, Paula Eshe, William Sjogren, Frank Lemoine, and Joe Twicken.