For purposes of indexing, BRO files are considered data and will appear in these files. 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.
There are also four sets of three files from the surface reflection investigation. 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. At PDS the assistance of Joel Wilf, Lyle Huber, and Ed Guinness was appreciated.