Effect of elliptic Gaussian footprint on range and range error for satellite laser altimeter

Yang Chi; Hu Wenyi; Luo Min; Sun Yingying; Zhou Hui

doi:10.3788/IRLA201645.0717003

Spatial distribution of the beam is an important factor of affecting range indicators for satellite laser altimeter. According to the distribution characteristic of received pulse signal and definition of the received pulse signal's time-centroid and its variance, the influence models of elliptic Gaussian footprint on range and range error for satellite laser altimeter were built, by modeling theoretically the elliptical Gaussian footprint and the linear target. Based on parameters of Geoscience Laser Altimeter System(GLAS), as for three typical observation target with slope degree and roughness(3, 1.7 m), (12.5, 8.9 m) and (28.2, 14.5 m), the influences of the elliptical Gaussian footprint's ellipticity and azimuth on the range and range error were discussed systematically with the ways of numerical simulation. The results show that laser range almost has no relation with the elliptical Gaussian footprint's ellipticity and azimuth, its maximal difference is less than 1 mm. However, laser range error will fluctuate markedly with the elliptical Gaussian footprint's ellipticity and azimuth, corresponding maximal difference reaches 47.04 cm. The conclusions provide practical application values for hardware design and performance assessment of satellite laser altimeter.

Effect of elliptic Gaussian footprint on range and range error for satellite laser altimeter

1. School of Electronic Information,Wuhan University,Wuhan 430072,China;

2. Geospatial Information Collaborative Innovation Center,Wuhan 430079,China

Received Date: 2015-11-24

Rev Recd Date: 2015-12-27

Publish Date: 2016-07-25

Key words:

Abstract: Spatial distribution of the beam is an important factor of affecting range indicators for satellite laser altimeter. According to the distribution characteristic of received pulse signal and definition of the received pulse signal's time-centroid and its variance, the influence models of elliptic Gaussian footprint on range and range error for satellite laser altimeter were built, by modeling theoretically the elliptical Gaussian footprint and the linear target. Based on parameters of Geoscience Laser Altimeter System(GLAS), as for three typical observation target with slope degree and roughness(3, 1.7 m), (12.5, 8.9 m) and (28.2, 14.5 m), the influences of the elliptical Gaussian footprint's ellipticity and azimuth on the range and range error were discussed systematically with the ways of numerical simulation. The results show that laser range almost has no relation with the elliptical Gaussian footprint's ellipticity and azimuth, its maximal difference is less than 1 mm. However, laser range error will fluctuate markedly with the elliptical Gaussian footprint's ellipticity and azimuth, corresponding maximal difference reaches 47.04 cm. The conclusions provide practical application values for hardware design and performance assessment of satellite laser altimeter.

HTML

Reference (13)

[1]	Chen Shuhang, Li Zile, Chen Mengzhu, et al. Influence of atmospheric multiple scattering effects on the range bias for satellite laser altimeter[J]. Infrared and Laser Engineering, 2012, 41(9):2522-2526. (in Chinese)陈舒杭, 李子乐, 陈梦竹, 等. 大气多次散射效应对星载激光测高仪测距偏差值的影响[J]. 红外与激光工程, 2012, 41(9):2522-2526.
[2]	Ma Yue, Li Song, Zhou Hui, et al. Noise suppression method for received waveform of satellite laser altimeter based on adaptive filter[J]. Infrared and Laser Engineering, 2012, 41(12):3263-3268. (in Chinese)马跃, 李松, 周辉, 等. 利用自适应滤波星载激光测高仪回波噪声抑制方法[J]. 红外与激光工程, 2012, 41(12):3263-3268.
[3]	Huang H, Wynne R H. Simulation of lidar waveforms with a time-dependent radiosity algorithm[J]. Canadian Journal of Remote Sensing, 2013, 39(S1):S126-S138.
[4]	Gardner C S. Ranging performance of satellite laser altimeters[J]. IEEE Transaction on Geoscience and Remote Sensing, 1992, 30(5):1061-1072
[5]	Dolan K A, Hurtt G C, Chambers J Q, et al. Using ICESat's geoscience laser altimeter system(GLAS) to assess large-scale forest disturbance caused by hurricane Katrina[J]. Remote Sensing of Environment, 2011, 115(1):86-96.
[6]	Brenner A C, Zwally H J, Bentley C R, et al. The algorithm theoretical basis document for the derivation of range and range distributions from laser pulse waveform analysis for surface elevations, roughness, slope, and vegetation heights[R]. US:NASA Goddard Space Flight Center, 2012.
[7]	Ma Yue, Li Song, Zhou Hui, et al. Effect of system parameters on ranging and pulse width in Ocean sateIlite Iaser aItimeter system[J]. Optics and Precision Engineering, 2013, 21(3):813-820. (in Chinese)马跃, 李松, 周辉, 等. 系统参数对激光测高仪海洋测距和回波脉宽影响[J]. 光学精密工程, 2013, 21(3):813-820.
[8]	Ma Yue, Yang Fanlin, Lu Xiushan, et al. Elevation error analysis of spaceborne laser altimeter for earth observation[J]. Infrared and Laser Engineering, 2015, 44(3):1042-1047. (in Chinese)马跃, 阳凡林, 卢秀山, 等. 对地观测星载激光测高系统高程误差分析[J]. 红外与激光工程, 2015, 44(3):1042-1047.
[9]	Abshire J B, Sun X, Riris H, et al. Geoscience laser altimeter system(GLAS) on the ICESat mission:on-orbit measurement performance[J]. Geophysical Research Letters, 2005, 32, L21S02-1-4.
[10]	Jiang Haijiao. Statistical properties of high repetition rate pulse laser radar range and its image quality evaluation[D]. Nanjing:Nanjing University of Science Technology, 2013. 姜海娇, 高重频脉冲激光雷达测距系统统计特性及其像质评价[D]. 南京:南京理工大学. 2013.
[11]	Gardner C S. Target signatures for laser altimeters:an analysis[J]. Applied Optics, 1982, 21(3):448-453.
[12]	Sun X L, Abshire J B, McGarry J F, et al. Space lidar developed at the NASA goddard space flight center-The First 20 Years[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2013, 6(3):1660-1675.
[13]	Fowler D K, Haran T M, McAllister M, et al. Enhancements for the geoscience laser altimeter system(GLAS) data products and services[C]//AGU Fall Meeting Abstracts. 2014, 1:0290.

Effect of elliptic Gaussian footprint on range and range error for satellite laser altimeter

doi: 10.3788/IRLA201645.0717003

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views