SINUS MERIDIANI: UNCONTROLLED MARS GLOBAL SURVEYOR (MGS) MARS ORBITAL CAMERA (MOC) DIGITAL CONTEXT PHOTOMOSAIC (250 M/PIXEL RESOLUTION) V. 1.0 NOREEN, Eric, USGS, 2255 N. Gemini Dr., Flagstaff, AZ 86001- 1600, and Cal State Univ. at Los Angeles, 2460 Meadow Valley Terrace, Los Angeles, CA 90039, ericnoreen@yahoo.com This mosaic covers a geographical region on Mars defined by: northwest corner: 15 Lat, 15 Lon; southeast corner: -15 Lat, -15 Lon. It was produced using the following MOC medium resolution images: fha00464 fha00540 fha00542 fha00675 fha00677 fha00741 fha00743 fha00811 fha00882 fha00947 fha01017 m0001087 m0001495 m0001658 m0001821 m0001823 m0002019 m0002180 m0002182 m0002200 m0002427 m0003166 m0100254 m0100256 m0100457 m0100459 m0100639 m0100641 m0100845 m0100847 m0101030 m0101032 m0101236 m0101238 m0101423 m0101442 m0101444 m0101627 m0101629 m0200224 m0200322 m0200445 m0200447 m0200449 m0200451 m0200766 m0200768 m0200770 m0200939 m0200941 m0200943 m0201241 m0201243 m0201540 m0201665 m0201846 m0201848 m0202052 m0202054 m0202062 m0202169 m0202171 m0202293 m0202295 m0202531 m0202533 m0202891 m0202893 m0203087 m0203088 m0203092 m0203375 m0203532 m0203920 m0204043 m0204044 m0204226 m0204581 m0204583 m0204775 m0300070 m0300072 m0300372 m0300374 m0300540 m0300542 m0300544 m0300546 m0300765 m0301143 m0301146 m0301324 m0301454 m0301792 m0301794 m0302717 m0302923 m0302925 m0303269 m0303271 m0303584 m0304390 m0304969 m0304971 m0305730 m0305732 m0306730 m0306836 m0306972 m0307309 m0307615 m0307617 m0307619 m0307621 m0400125 m0400240 m0400242 m0400569 m0400571 m0400773 m0400915 m0401288 m0401291 These images were processed from a raw format using Integrated Software for Images and Spectrometers (ISIS) to perform radiometric corrections and projection. All the images were projected in sinusoidal using a center longitude of 0 degrees. There are two versions of the mosaic, one unfiltered (sinusmos.tif), and one produced with all images processed through a box filter with an averaged pixel tone of 7.5 (sinusmosflt.tif). Both mosaics are ArcView-ArcInfo ready in TIF format with associated world files (*.tfw). Acknowledgements: The author would like to thank the following people for their help and training that made these mosaics possible: Kenneth Tanaka, Trent Hare, Jim Skinner and Sarah Hamiln.