Mathematics – Logic
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p41a1589b&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #P41A-1589
Mathematics
Logic
[1243] Geodesy And Gravity / Space Geodetic Surveys, [1926] Informatics / Geospatial, [1976] Informatics / Software Tools And Services, [6235] Planetary Sciences: Solar System Objects / Mercury
Scientific paper
The MESSENGER spacecraft entered orbit around Mercury in March 2011. Since then, the Mercury Dual Imaging System (MDIS) has been steadily acquiring images from the monochrome, narrow-angle camera (NAC) and the multispectral, wide-angle camera (WAC). With these images, the U.S. Geological Survey (USGS) is constructing a global, controlled monochrome base map of the planet using the Integrated Software for Imagers and Spectrometers (ISIS3) [1]. Although the characterization of MESSENGER spacecraft's navigation and attitude data has proven to be reliable to date, an element of uncertainty in these parameters is unavoidable. This leads to registration offsets between images in the base map. To minimize these errors, images are controlled using a least-squares bundle adjustment that provides refined spacecraft attitude and position parameters plus triangulated ground coordinates of image tie points. As a first effort, 4542 images (2781 NAC, 1761 WAC G filter) have been controlled with a root mean squared error of 0.25 pixels in image space [2]. A preliminary digital elevation model (DEM) is also being produced from the large number of ground points (~ 47,000) triangulated in this adjustment. The region defined by these points ranges from 80°S to 86°N latitude and 158°E to 358°E longitude. A symmetric, unimodal distribution and a dynamic range of 10.5 km characterize the hypsometry of this area. Minimum, maximum, and mean elevations are -5.0, 5.5, and -0.2 km relative to the mean radius of Mercury (2440 km) as defined by the mission. The USGS will use the DEM and base map for the construction of a registered color (WAC) map of high spatial integrity essential for reliable scientific interpretation of the color data. Ongoing improvements to the base map will be made as new images from MDIS become available, providing continuity in resolution, illumination, and viewing conditions. Additional bundle adjustments will further improve spacecraft attitude. The results from further bundle adjustments will ultimately be provided to users in the form of a new, smithed (derived) CK SPICE [3] kernel (C-matrix subsystem dealing with orientation of spacecraft and rotating structures on the spacecraft), replacing the original reconstructed kernel (typically provided by the mission navigation team). The determination of updated attitude parameters for every image acquired by MDIS is a primary goal of the USGS. [1] Anderson, J. A., et al. (2004) Modernization of the Integrated Software for Imagers and Spectrometers, Lunar Planet. Sci. 35, abstract 2039. [2] Edmundson, K. L., et al. (2011), Preliminary photogrammetric control of MESSENGER orbital images of Mercury, GSA Annual Meeting, submitted. [3] Acton, C. H. (1966), Ancillary data services of NASA's Navigation and Ancillary Information Facility, Planet. Space Sci. 44, 65-70.
Becker Julia K.
Becker Tammy L.
Edmundson K. L.
Robinson Mark S.
Solomon Stanley C.
No associations
LandOfFree
Global Controlled Mosaic of Mercury from MESSENGER Orbital Images does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Global Controlled Mosaic of Mercury from MESSENGER Orbital Images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Global Controlled Mosaic of Mercury from MESSENGER Orbital Images will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-871310