A New Lunar DEM Based on the Calibrated Chang'E-1 Laser Altimeter Data
A New Lunar DEM Based on the Calibrated Chang'E-1 Laser Altimeter Data
复制标题
基于嫦娥一号激光高度计校准数据的新型月球DEM
DOI：
10.1155/2018/5363797
复制
发表时间：
2018
影响因子：
1.4
通讯作者：
Huang Y
中科院分区：
文献类型：
--
作者：
Huang Yong;Chang Shengqi;Qin Songhe;Li Peijia;Hu Xiaogong;Huang Yong;Qin Songhe;Chang Shengqi;Fan Min;Huang Y;Huang Y
To improve the lunar DEM accuracy derived from CE‐1 altimeter data, CE‐1 laser altimeter data are calibrated in this paper. Orbit accuracy and ranging accuracy are the two most important factors to affect the application of altimeter data in the lunar topography. An empirical method is proposed to calibrate CE‐1 altimeter data, using gridded LOLA DEM to correct systematic errors of CE‐1 altimeter data, and the systematic bias is about ‐139.52 m. A new lunar DEM grid model based on calibrated CE‐1 altimeter data with the spatial resolution of 0.0625° × 0.0625° is obtained as well as a spherical harmonic model at 1400th order. Furthermore, the DEM accuracy is assessed through the comparison with the nearside landmarks of the Moon, and the results show that the DEM accuracy is improved from 127.3 m to 48.7 m after the calibration of laser altimeter data.
