A new lunar digital elevation model from the Lunar Orbiter Laser Altimeter and SELENE Terrain Camera

作者：Barker, M. K.^*; Mazarico, E.; Neumann, G. A.; Zuber, M. T.; Haruyama, J.; Smith, D. E.

来源：Icarus, 2016, 273: 346-355.

DOI：10.1016/j.icarus.2015.07.039

• Moon
• Moon, interior
• Moon, surface

We present an improved lunar digital elevation model (DEM) covering latitudes within 60, at a horizontal resolution of 512 pixels per degree (similar to 60 m at the equator) and a typical vertical accuracy similar to 3 to 4 m. This DEM is constructed from similar to 4.5 x 10(9) geodetically-accurate topographic heights from the Lunar Orbiter Laser Altimeter (LOLA) onboard the Lunar Reconnaissance Orbiter, to which we co-registered 43,200 stereo-derived DEMs (each 1 degrees x 1 degrees) from the SELENE Terrain Camera (TC) (similar to 10(10) pixels total). After co-registration, approximately 90% of the TC DEMs show root-mean-square vertical residuals with the LOLA data of <5 m compared to similar to 50% prior to co-registration. We use the co-registered TC data to estimate and correct orbital and pointing geolocation errors from the LOLA altimetric profiles (typically amounting to <10 m horizontally and <1 m vertically). By combining both co-registered datasets, we obtain a near-global DEM with high geodetic accuracy, and without the need for surface interpolation. We evaluate the resulting LOLA + TC merged DEM (designated as "SLDEM2015") with particular attention to quantifying seams and crossover errors.

• 出版日期2016-7-15