A New Lunar DEM Based on the Calibrated Chang’E-1 Laser Altimeter Data
| Autor: | Xiaogong Hu, Yong Huang, Min Fan, Songhe Qin, Peijia Li, Shengqi Chang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Systematic error Article Subject 010504 meteorology & atmospheric sciences lcsh:Astronomy Astronomy and Astrophysics Ranging Laser 01 natural sciences law.invention lcsh:QB1-991 Space and Planetary Science law 0103 physical sciences Orbit (dynamics) Calibration Altimeter 010303 astronomy & astrophysics Image resolution 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Advances in Astronomy, Vol 2018 (2018) |
| ISSN: | 1687-7977 1687-7969 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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