سابِق|تال

Construction of ageo-location model and verification of GF-7 spaceborne laser altimetry

  • role： First author第一作者
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

    China Siwei Surveying and Mapping Technology Co. Ltd., Beijing 100094, China

  • Email：chenxinyang@chinasiwei.com
  • Introduction：陈新阳，研究方向为星载激光、光学数据处理与应用。E-mail： chenxinyang@chinasiwei.com
CHEN Xinyang12,  
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

QIAO Zhiyuan1,  
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

LONG Xiaoxiang1,  
  • role： Corresponding author通信作者
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

  • Email：liqingpeng@chinasiwei.com
  • Introduction：李庆鹏，研究方向为卫星高精度测绘的理论方法与应用。E-mail： liqingpeng@chinasiwei.com
LI Qingpeng1*,  
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

    China Siwei Surveying and Mapping Technology Co. Ltd., Beijing 100094, China

LIU Xiaotian12,  
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

ZHONG Huimin1,  
  • Affiliation：

    China Centre For Resources Satellite Data and Application, Beijing 100094, China

WANG Xiaoyan1,  
  • Affiliation：

    Aerospace Information Research Institute, Chinese Academy of Science, Beijing 100094, China

WANG Jianhua3

ملخص

Spaceborne laser altimeter plays an important role in stereo mapping services and in the measurement of ice caps, vegetation height, sea surface, and so on. Spaceborne laser altimetry, an Earth observation technology, has been widely used in America for about 20 years. However, China has used only experimental spaceborne laser altimetry for Earth observation. GF-7 is the first Earth observation laser altimeter of China, and it is equipped with full-waveform lidar. The data of spaceborne laser altimeters can be regarded as control points to realize the requirement of 1∶10000 stereoscopic mapping under the condition of few control points. In this study, a spaceborne laser altimetry geo-location model and an on-orbit geometric calibration and verification method are proposed to meet the high processing precision requirement of the first full-waveform spaceborne laser altimeter of China and realize the localization of geometric positioning and data processing for full-waveform spaceborne laser altimetry.First, a rigorous geometric model for the GF-7 spaceborne laser altimeter is built. Second, the peak value extraction method of moving the center of gravity and waveform decomposition are used. Third, the calibration method of the GF-7 spaceborne laser beam is established based on terrain matching and infrared detection. Lastly, comprehensive validation methods, including SRTM (Shuttle Radar Topography Mission)elevation verification, lake elevation verification, and calibration site elevation verification, are put forward to verify the positioning accuracy of the spaceborne laser altimeter comprehensively.The suitable data of the GF-7 spaceborne laser altimeter in Neimenggu Province and Qinghai Lake are selected, and IR detectors are placed in a field in Neimenggu Province. A series of on-orbit geometric calibration and verification experiments are conducted. The experiments show that the corresponding pointing angle error of Laser 1 is about 0.15", and that of Laser 2 is about 0.38". After correcting the pointing angle error, the height measurement error of the laser altimeter is better than 0.15 m in the flat area. GF-7, the first spaceborne laser altimeter for Earth observation in China, has good performance. It can realize high-precision positioning and data processing for full-waveform spaceborne laser altimetry.The results also show that the method in this study has high processing accuracy and realizes the first domestic processing of full-waveform spaceborne laser altimetry data. The processed data can satisfy the requirements of scientific research and subsequent large-scale application. Moreover, the geo-location model for GF-7 and the calibration verification method established in this study can be used for domestic spaceborne laser altimetry in the future.

مفهوم

GF-7 satellite;Laser altimeter;Rigorous geometric model;Geometric calibration;accuracy verification

References

  1. 1.
    Adriani A, Massoli P, Di Donfrancesco G, Cairo F, Moriconi M L and Snels M. 2004. Climatology of polar stratospheric clouds based on lidar observations from 1993 to 2001 over McMurdo Station, Antarctica. Journal of Geophysical Research: Atmospheres, 109(D24): D24211
  2. 2.
    Anita C B, Jay Z H, Charles R B, Bea M C, David J H, Michelle A H, Jean-Bernard M, LeeAnne R, Jack L, Robert H T and Donghui Y. 2000. Derivation of range and range distributions from laser pulse waveform analysis for surface elevations, roughness, slope, and vegetation heights. Algorithm Theoretical Basis Document Version 3. 0, 1-93.
  3. 3.
    Chen X Y. 2019. Waveform Processing and Accuracy Verification of Airborne Large-Footprint LiDAR System. Wuhan: Wuhan University: 16-25
  4. 4.
    Guo A Y, Dai J, Zhao C G and Zhang X W. 2020. Design and on-orbit validation of GF-7 satellite laser altimeter. Spacecraft Engineering, 29(3): 43-48
  5. 5.
    Huang G H, Ding Y X, Wu J C, Shu R, Wang X and Jiang Z Q. 2020. Design and implementation of key technology of GF-7 satellite laser altimeter subsystem. Spacecraft Engineering, 29(3): 68-73
  6. 6.
    Jiang Y H, Zhang G, Tang X M, Zhu X Y, Qin Q Q, Li D R and Fu X K. 2013. High accuracy geometric calibration of ZY-3 three-line image. Acta Geodaetica et Cartographica Sinica, 42(4): 523-529, 553
  7. 7.
    Knapp N, Fischer R and Huth A. 2018. Linking lidar and forest modeling to assess biomass estimation across scales and disturbance states. Remote Sensing of Environment, 205: 199-209
  8. 8.
    Li G Y. 2017. Earth Observing Satellite Laser Altimeter Data Processing Method and Engineer Practice. Wuhan: Wuhan University: 33-39
  9. 9.
    Li P C, Xu Q, Xing S, Liu Z Q, Geng X and Hou X F. 2015. Step progressive decomposition of full waveform data using Levenberg Marquardt. Journal of Geomatics Science and Technology, 32(3): 256-260, 265
  10. 10.
    Li S N. 2017. Research on Geometric Calibration of Earth Observation Satellite Laser Altimeter. Wuhan: Wuhan University: 32-47
  11. 11.
    Lian W Q, Li S N, Zhang G, Wang Y N, Chen X Y and Cui H. 2020. Accuracy verification of airborne large-footprint lidar based on terrain features. Remote Sensing, 12(5): 879
  12. 12.
    Ma Y, Yang F L, Wang M W, Li S and Weng Y K. 2015. Calculation of elevation changing of Greenlandˊs ice sheet using GLAS laser altimeter. Infrared and Laser Engineering, 44(12): 3565-3569
  13. 13.
    Simard M, Pinto N, Fisher J B and Baccini A. 2011. Mapping forest canopy height globally with spaceborne lidar. Journal of Geophysical Research: Biogeosciences, 116(G4): G04021
  14. 14.
    Spang R, Hoffmann L, Müller R, Grooß J U, Tritscher I, Höpfner M, Pitts M, Orr A and Riese M. 2018. A climatology of polar stratospheric cloud composition between 2002 and 2012 based on MIPAS/Envisat observations. Atmospheric Chemistry and Physics, 18(7): 5089-5113
  15. 15.
    Tang X M, Li S J, Li T, Gao Y D, Zhang S B, Chen Q F and Zhang X. 2021. Review on global digital elevation products. National Remote Sensing Bulletin, 25(1): 167-181
  16. 16.
    Wen H J, Liu H L, Chang X T and Cheng P F. 2011. Accuracy assessment of ICESAT laser altimeter data using GPS measurements. Geomatics and Information Science of Wuhan University, 36(3): 262-266
  17. 17.
    Xu W, Long X X, Yu W Y and Li Q P. 2012. Geometric quality analysis of three-line array CCD imagery of ZY-3 satellite. Spacecraft Recovery and Remote Sensing, 33(3): 55-64
  18. 18.
    Zhang G, Li S N, Huang W C and Li D R. 2017. Geometric calibration and validation of ZY3-02 satellite laser altimeter system. Geomatics and Information Science of Wuhan University, 42(11): 1589-1596
  19. 19.
    Zhang J Q, Pan L and Wang S G. 2003. Geo-Spatial Information Science. Wuhan: Wuhan University

قراءة النص الكامل

The above content is generated by Large Model Translation. The translated content is for reference only. We do not assume any commercial or legal responsibilty for any consequences arising from the use of our website