This directory contains 28 Mars Global Surveyor Orbiter Camera (MOC) images in Planetary Data System (PDS) compressed image (IMQ) format. To create PDS uncompressed image (IMG) format, use the program 'readmoc' which is provided on the PDS archive CD-ROMs in the software directory. That directory includes both a SunOS (and Solaris) and Windows98 (DOS) version of the decompression program. This directory also includes a text file, 'ancillary.tab' that provides ancillary image information in PDS format, and a JPEG version of the maps provided by T. Parker showing the landing ellipses presently being targeted, with the approximate locations of the 18 NA and 10 WA context images included in this release marked in red and blue, respectively. NOTE: These data have not been validated for delivery to the PDS. They are made available to the Mars Geoscience community and the Mars Exploration Program to support landing site selection and validation for the Mars Exploration Rover (MER) 2003 and later landing missions. NOTE: These images were taken as the atmosphere was clearing after the Global Dust Storms of 2001. Full-resolution images were nearly feature- less and so images were summed to improve signal-to-noise. None of these images is at better than 6 m/pixel. Future observations will return to acquiring higher-resolution images. Please direct all inquires regarding these ellipses, and the images provided in this directory, to the Mars Operations Office or the Mars Exploration Office at the Jet Propulsion Laboratory: T. E. Thorpe, MGS Project Manger, tom.e.thorpe@jpl.nasa.gov M. P. Golombek, Landing Site Scientist, matthew.p.golombek@jpl.nasa.gov T. J. Parker, Landing Site Scientist, timothy.j.parker@jpl.nasa.gov