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改进飞船的激光测高计
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《激光与光电子学进展》 1973年第3期38-38,共1页
为了避免像在阿波罗16号飞行中导致轨道实验数据遭受部分损失的问题,已经重新设计了阿波罗17号飞船上的美国无线电公司的测高计的轴承。据参加阿波罗轨道实验计划的科学家罗伯逊(Floyd.I.Roberson)说。
关键词 飞船 激光测高计 阿波罗
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A topographic parameter inversion method based on laser altimetry 被引量:2
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作者 HUANG ChunMing ZHANG ShaoDong CHEN Xi 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第5期1273-1280,共8页
A topographic parameter inversion method based on laser altimetry is developed in this paper, which can be used to deduce the surface vertical profile and retrieve the topographic parameters within the laser footprint... A topographic parameter inversion method based on laser altimetry is developed in this paper, which can be used to deduce the surface vertical profile and retrieve the topographic parameters within the laser footprints by analyzing and simulating return waveforms. This method comprises three steps. The first step is to build the numerical models for the whole measuring procedure of laser altimetry, construct digital elevation models for surfaces with different topographic parameters, and calculate return waveforms. The second step is to analyze the simulated return waveforms to obtain their characteristics parameters, summarize the effects of the topographic parameter variations on the characteristic parameters of simulated return waveforms, and analyze the observed return waveforms of laser altimeters to acquire their characteristic parameters at the same time. The last step is to match the characteristic parameters of the simulated and observed return waveforms, and deduce the topographic parameters within the laser footprint. This method can be used to retrieve the topographic parameters within the laser footprint from the observed return waveforms of spaceborne laser altimeters and to get knowledge about the surface altitude distribution within the laser footprint other than only getting the height of the surface encountered firstly by the laser beam, which extends laser altimeters' function and makes them more like radars. 展开更多
关键词 Laser altimetry return waveform simulation Gaussian fitting topographic parameter inversion
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