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Remote Sens. 2018, 10(9), 1442; https://doi.org/10.3390/rs10091442

An Improved Digital Elevation Model of the Lunar Mons Rümker Region Based on Multisource Altimeter Data

1
Chinese Antarctic Center of Surveying and Mapping, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
2
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
3
Observatoire Géodésique de Tahiti, University of French Polynesia, BP 6570, 98702 Faa’a, Tahiti, French Polynesia
4
School of Urban Design, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
5
Electronic Information School, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
*
Authors to whom correspondence should be addressed.
Received: 4 July 2018 / Revised: 29 August 2018 / Accepted: 7 September 2018 / Published: 10 September 2018
(This article belongs to the Special Issue Advances in Satellite Altimetry and Its Application)
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Abstract

Mons Rümker is the primary candidate region for the lunar landing mission of Chang’E-5. We propose a data processing method that combines multisource altimeter data and we developed an improved digital elevation model (DEM) of the Mons Rümker region with a horizontal resolution of 256 pixels per degree. The lunar orbiter laser altimeter (LOLA) onboard the lunar reconnaissance orbiter (LRO) acquired 884 valid orbital benchmark data with a high precision. A special crossover adjustment of 156 orbital profiles from the Chang’E-1 laser altimeter (LAM) and 149 orbital profiles from the SELenological and ENgineering Explorer (SELENE) laser altimeter (LALT) was applied. The radial residual root mean square (RMS) of the LAM was reduced from 154.83 ± 43.60 m to 14.29 ± 27.84 m and that of the LALT was decreased from 3.50 ± 5.0 m to 2.75 ± 4.4 m. We used the adjusted LAM and LALT data to fill the LOLA gaps and created the merged LOLA + LAM and LOLA + LALT DEMs. The merged LOLA + LAM DEM showed distortions because of the horizontal geolocation errors in the LAM data. The merged LOLA + LALT DEM was closer to the ground truth than the LOLA-only DEM when validated with the images of the LRO camera (LROC). View Full-Text
Keywords: laser altimeter; multisource; crossover analysis; DEM; Chang’E-5 laser altimeter; multisource; crossover analysis; DEM; Chang’E-5
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Li, F.; Zhu, C.; Hao, W.; Yan, J.; Ye, M.; Barriot, J.-P.; Cheng, Q.; Sun, T. An Improved Digital Elevation Model of the Lunar Mons Rümker Region Based on Multisource Altimeter Data. Remote Sens. 2018, 10, 1442.

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