Ontology type: schema:ScholarlyArticle Open Access: True
2011-01
AUTHORSH. S. Fok, C. K. Shum, Yuchan Yi, Hiroshi Araki, Jinsong Ping, James G. Williams, Georgia Fotopoulos, Hirotomo Noda, Sander Goossens, Qian Huang, Yoshiaki Ishihara, Koji Matsumoto, Jürgen Oberst, Sho Sasaki
ABSTRACTBoth the Chang’E-1 and SELenological and ENgineering Explorer (SELENE) lunar missions, launched in 2007, provide an opportunity for significant advances in lunar science. In particular, both orbiters provide refined lunar topography models with unprecedented finer resolution and improved accuracy, especially for the far side and the polar areas of the Moon where fewer valid measurements have been available to date. An evaluation of the derived topography models is essential for the improved interpretation of selenophysics, including a knowledge of the interior of the Moon. This study provides both external and internal accuracy assessments for the derived topographic models (note that different data sets are used, albeit independent). The external comparison, which consists of comparing the topographic models with landmarks established with lunar laser ranging and radio tracking, yields an accuracy estimate of 157 m for the Change’E-1 model and 58 m for the SELENE model (150 m and 55 m if the newly recovered Lunakhod-1 site is included). The internal comparison, consisting of crossover analysis of the altimeter data after the removal of once-per-orbital-revolution errors, yields an accuracy estimate of 206 m and 68 m, respectively. These comparisons allow the establishment of conservative estimates of accuracy of 200 m and 70 m for the Chang’E-1 and SELENE models, respectively. Given the conservative estimates on the accuracy, both models yield significant improvement by factors of 2.5 and 8, respectively, when compared with a contemporary lunar topography model, i.e., the Unified Lunar Control Network 2005 (ULCN2005). More... »
PAGES15-23
http://scigraph.springernature.com/pub.10.5047/eps.2010.08.005
DOIhttp://dx.doi.org/10.5047/eps.2010.08.005
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