研究目的
To improve the lunar DEM accuracy derived from CE-1 altimeter data by calibrating CE-1 laser altimeter data.
研究成果
The DEM accuracy was improved from about 127.3 m to about 48.7 m after the correction of the systematic errors in LAM data. A lunar DEM grid model with the spatial resolution of 0.0625° × 0.0625° was obtained based on the calibrated LAM data.
研究不足
The method cannot remove orbital errors totally. The accuracy of LOLA derived DEM is better than that of LAM data, not only for its higher precision of altimeter data but also for its higher space resolution.
1：Experimental Design and Method Selection:
An empirical method was proposed to calibrate CE-1 altimeter data, using gridded LOLA DEM to correct systematic errors of CE-1 altimeter data.
2：Sample Selection and Data Sources:
CE-1 LAM observations (LAM 2B-SHAO data) and LOLA data were used.
3：List of Experimental Equipment and Materials:
CE-1 laser altimeter data and LOLA data.
4：Experimental Procedures and Operational Workflow:
The systematic errors in LAM data were calibrated using LOLA data as the benchmark. A new lunar DEM was generated using calibrated LAM data.
5：Data Analysis Methods:
The DEM accuracy was assessed through the comparison with the nearside landmarks of the Moon.
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