References

1. 1.
   Alexandrov O and Beyer R A. 2018. Multiview shape-from-shading for planetary images. Earth and Space Science, 5(10): 652-666
2. 2.
   Araki H, Tazawa S, Noda H, Ishihara Y, Goossens S, Sasaki S, Kawano N, Kamiya I, Otake H, Oberst J and Shum C. 2009. Lunar global shape and polar topography derived from Kaguya-LALT laser altimetry. Science, 323(5916): 897-900
3. 3.
   Archinal B, Lee E, Weller L, Richie J, Edmundson K, Robinson M, Speyerer E, Boyd A, Bowman-Cisneros E, Wagner R and Nefian A. 2015. Status of geodetically controlled high-resolution lroc polar mosaics.
4. 4.
   Archinal B A, Rosiek M R, Kirk R L and Redding B L. 2006. The unified lunar control network 2005. Open-File Report
5. 5.
   Bailey A M, Martin A C, Grey P E, Henriksen M R, Robinson M S and the LROC Team. 2020. LROC NAC feature mosaics: a powerful tool for lunar landing missions//Lunar Surface Science Workshop 2020. Denver: LPI: 5142
6. 6.
   Barker M K, Mazarico E, Neumann G A, Zuber M T, Haruyama J and Smith D E. 2016. A new lunar digital elevation model from the lunar orbiter laser altimeter and selene terrain camera. Icarus, 273: 346-355
7. 7.
   Barker M K, Mazarico E, Neumann G A, Smith D E, Zuber M T and Head J W. 2021. Improved LOLA elevation maps for south pole landing sites: error estimates and their impact on illumination conditions. Planetary and Space Science, 203: 105119
8. 8.
   Chappelow J E. 2013. Simple impact crater shape determination from shadows. Meteoritics and Planetary Science, 48(10): 1863-1872
9. 9.
   Chen C, Ye Z, Xu Y S, Liu D Y, Huang R, Zhou M Y, Xie H and Tong X H. 2024. Large-scale block bundle adjustment of LROC NAC images for lunar south pole mapping based on topographic constraint. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 17: 2731-2746
10. 10.
    Chen H, Hu X Y, Gläser P, Xiao H F, Ye Z, Zhang H Y, Tong X H and Oberst J. 2022. CNN-based large area pixel-resolution topography retrieval from single-view LROC NAC images constrained with SLDEM. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 15: 9398-9416
11. 11.
    Chen Z Y, Wu B and Liu W C. 2020. Deep learning for 3D reconstruction of the martian surface using monocular images: a first glance. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 43: 1111-1116
12. 12.
    Chen Z Y, Wu B and Liu W C. 2021. Mars3DNet: CNN-based high-resolution 3D reconstruction of the martian surface from single images. Remote Sensing, 13(5): 839
13. 13.
    Davis P A and Soderblom L A. 1984. Modeling crater topography and albedo from monoscopic Viking Orbiter images. I. Methodology. Journal of Geophysical Research: Solid Earth, 89(B11): 9449-9457
14. 14.
    Di K C, Jia M N, Xin X, Wang J, Liu B, Li J, Xie J F, Liu Z Q, Peng M, Yue Z Y, Liu J, Chen R L and Zhang C L. 2019a. High-resolution large-area digital orthophoto map generation using LROC NAC images. Photogrammetric Engineering and Remote Sensing (in Chinese), 85(7): 481-491
15. 15.
    Di K C, Liu B, Liu Z Q and Zou Y L. 2016. Review and prospect of lunar mapping using remote sensing data. Journal of Remote Sensing (in Chinese), 20(5): 1230-1242
16. 16.
    Di K C, Liu B, Peng M, Xin X, Jia M N, Zuo W, Ping J S, Wu B and Oberst J. 2018. Scheme and key techniques for construction of new-generation lunar global control network using multi-misson data. Geomatics and Information Science of Wuhan University, 43(12): 2099-2105
17. 17.
    Di K C, Liu B, Xin X, Yue Z Y and Ye L J. 2019. Advances and applications of lunar photogrammetric mapping using orbital images. Acta Geodaetica et Cartographica Sinica, 48(12): 1562-1574
18. 18.
    Di K C, Liu Z Q, Wan W H and Peng M. 2015. Lunar and Mars Remote Sensing Mapping and Rover Localization. Beijing: Science Press
19. 19.
    Di K C, Oberst J, Karachevtseva I and Wu B. 2020. Topographic mapping of the moon in the 21st century: from hectometer to millimeter scales. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 43(B3): 1117-1124
20. 20.
    Di K C, Wan W H, Zhao H Y, Liu Z Q, Wang R Z and Zhang F Z. 2019b. Progress and applications of visual SLAM. Journal of Geodesy and Geoinformation Science, 2(2): 38-49
21. 21.
    Efford N D. 1991. Sources of error in the photoclinometric determination of planetary topography: a reappraisal. Earth, Moon, and Planets, 54(1): 19-58
22. 22.
    General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of the People’s Pepublic of China. 2008a. GB/T 18316-2008 Specifications for inspection and acceptance of quality of digital surveying and mapping achievements. Beijing: Standards Press of China: 28
23. 23.
    General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China, Standardization Administration of the People’s Pepublic of China. 2008b. GB/T 15968-2008 Specifications for remote sensing image plan making. Beijing: Standards Press of China: 16
24. 24.
    Grumpe A, Belkhir F and Wöhler C. 2014. Construction of lunar DEMs based on reflectance modelling. Advances in Space Research, 53(12): 1735-1767
25. 25.
    Han X N, Li S L, Wang X H and Zhou W J. 2021. Semantic mapping for mobile robots in indoor scenes: a survey. Information, 12(2): 92
26. 26.
    Haruyama J, Hara S, Hioki K, Iwasaki A, Morota T, Ohtake M, Matsunaga T, Araki H, Matsumoto K, Ishihara Y, Noda H, Sasaki S, Goossens S and Iwata T. 2012. Lunar global digital terrain model dataset produced from SELENE (Kaguya) terrain camera stereo observations//43rd Lunar and Planetary Science Conference. The Woodlands: [s.n.]: 1200
27. 27.
    Henriksen M R, Gojic D, Gray P E, Wagner R V, Robinson M S and the LROC Team. 2015. Regional LROC NAC controlled mosaics and absolute accuracy assessement//Second Planetary Data Workshop. Flagstaff: [s.n.]: 7033
28. 28.
    Hess M, Tenthoff M, Wohlfarth K and Wöhler C. 2022. Atmospheric correction for high-resolution shape from shading on mars. Journal of Imaging, 8(6): 158
29. 29.
    Horn B K P. 1990. Height and gradient from shading. International Journal of Computer Vision, 5(1): 37-75
30. 30.
    Hu W M and Di K C. 2016. Uncertainty Analysis and Global Adjustment of Chang’e-1 Laser Altimeter Data. Beijing: Surveying and Mapping Press
31. 31.
    Jankowski D G and Squyres S W. 1991. Sources of error in planetary photoclinometry. Journal of Geophysical Research: Planets, 96(E4): 20907-20922
32. 32.
    Ji J Z, Guo D J, Liu J Z, Chen S B, Ling Z C, Ding X Z, Han K Y, Chen J P, Cheng W M, Zhu K, Liu J W, Wang J T, Chen J and Ouyang Z Y. 2022. The 1: 2,500,000-scale geologic map of the global Moon. Science Bulletin, 67(15): 1544-1548
33. 33.
    Jia B J, Fa W Z, Zhang M W, Di K C, Xie M G, Tai Y S and Li Y. 2022. On the provenance of the Chang'e-5 lunar samples. Earth and Planetary Science Letters, 596: 117791
34. 34.
    Jia M N, Yue Z Y, Di K C, Liu B, Liu J Z and Michael G. 2020. A catalogue of impact craters larger than 200 m and surface age analysis in the Chang'e-5 landing area. Earth and Planetary Science Letters, 541: 116272
35. 35.
    Kirk R L. 1987. A Fast Finite-Element Algorithm for Two-Dimensional Photoclinometry. Pasadena: Division of Geological and Planetary Sciences, California Institute of Technology
36. 36.
    Kirk R L, Archinal B A, Gaddis L R and Rosiek M R. 2012. Lunar cartography: progress in the 2000s and prospects for the 2010s. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 39: 489-494
37. 37.
    Kirk R L, Howington-Kraus E, Redding B, Galuszka D, Hare T M, Archinal B A, Soderblom L A and Barrett J M. 2003. High-resolution topomapping of candidate MER landing sites with Mars Orbiter Camera narrow-angle images. Journal of Geophysical Research: Planets, 108(E12): 8088
38. 38.
    Kirk R L, Mayer D P, Fergason R L, Redding B L, Galuszka D M, Hare T M and Gwinner K. 2021. Evaluating stereo digital terrain model quality at mars rover landing sites with HRSC, CTX, and HiRISE images. Remote Sensing, 13(17): 3511
39. 39.
    Lee E M, Gaddis L R, Weller L, Richie J O, Becker T, Shinaman J, Rosiek M R and Archinal B A. 2009. A new clementine basemap of the moon//40th Lunar and Planetary Science Conference. The Woodlands: [s.n.]: 2445
40. 40.
    Li C L, Liu J J, Ren X, Mu L L, Zou Y L, Zhang H B, Lü C, Liu J Z, Zuo W, Su Y, Wen W B, Bian W, Zhao B C, Yang J F, Zou X D, Wang M, Xu C, Kong D Q, Wang X Q, Wang F, Geng L, Zhang Z B, Zheng L, Zhu X Y, Li J D and Ouyang Z Y. 2010a. Laser altimetry data of Chang’e-1 and the global lunar DEM model. Science China Earth Sciences, 53(11): 1582-1593
41. 41.
    Li C L, Ren X, Liu J J, Zou X D, Mou L L, Wang J Y, Shu R, Zou Y L, Zhang H B, Lü C, Liu J Z, Zuo W, Su Y, Wen W B, Bian W, Wang M, Xu C, Kong D Q, Wang X Q, Wang F, Geng L, Zhang Z B, Zhen L, Zhu X Y, Li J Y,Ouyang Z Y. 2010b. Laser altimetry data of Chang’E-1 and the global lunar DEM model. Sci China Earth Sci, 40: 281-293
42. 42.
    Li C L, Liu J J, Ren X, Yan W, Zuo W, Mu L L, Zhang H B, Su Y, Wen W B, Tan X, Zhang X X, Wang W R, Fu Q, Geng L, Zhang G L, Zhao B C, Yang J F and Ouyang Z Y. 2018. Lunar global high-precision terrain reconstruction based on Chang’e-2 stereo images. Geomatics and Information Science of Wuhan University, 43(4): 485-495
43. 43.
    Li Q H, Degnan J, Barrett T and Shan J. 2016. First evaluation on single photon-sensitive lidar data. Photogrammetric Engineering and Remote Sensing, 82(7): 455-463
44. 44.
    Liu B, Niu S, Xin X, Jia M, Di K, Liu Z, Peng M and Yue Z. 2019. High precision dtm and dom generating using multi-source orbital data on Chang’e-4 landing site. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLII-2-W13: 1413-1417
45. 45.
    Liu P Y, Geng X, Li T, Zhang J J, Wang Y Y, Peng Z, Wang Y H, Ma X and Wang Q D. 2024. The generation of high-resolution mapping products for the lunar south pole using photogrammetry and photoclinometry. Remote Sensing, 16(12): 2097
46. 46.
    Liu S H, Yan J G, Cao J F, Ye M, Li X, Li F and Barriot J P. 2021. Review of the precise orbit determination for Chinese lunar exploration projects. Earth and Space Science, 8(4): e2020EA001361
47. 47.
    Liu W C and Wu B. 2020. An integrated photogrammetric and photoclinometric approach for illumination-invariant pixel-resolution 3D mapping of the lunar surface. ISPRS Journal of Photogrammetry and Remote Sensing, 159: 153-168
48. 48.
    Liu W C and Wu B. 2021. Influence of solar incidence angle on single-image photoclinometry for precision lunar topographic mapping. ISPRS Journal of Photogrammetry and Remote Sensing, 182: 208-227
49. 49.
    Liu W C and Wu B. 2023. Atmosphere-aware photoclinometry for pixel-wise 3D topographic mapping of Mars. ISPRS Journal of Photogrammetry and Remote Sensing, 204: 237-256
50. 50.
    Liu Y, Wang Y X, Di K C, Peng M, Wan W H and Liu Z Q. 2022. A generative adversarial network for pixel-scale lunar DEM generation from high-resolution monocular imagery and low-resolution DEM. Remote Sensing, 14(21): 5420
51. 51.
    Liu Z Q, Di K C, Li J, Xie J F, Cui X F, Xi L H, Wan W H, Peng M, Liu B, Wang Y X, Gou S, Yue Z Y, Yu T Y, Li L C, Wang J, Liu C K, Xin X, Jia M N, Bo Z, Liu J, Wang R Z, Niu S L, Zhang K, You Y, Liu B and Liu J G. 2020. Landing site topographic mapping and rover localization for Chang’e-4 mission. Science China Information Sciences, 63(4): 140901
52. 52.
    Liu Z Q, Di K C, Peng M, Wan W H, Liu B, Li L C, Yu T Y, Wang B F, Zhou J L and Chen H M. 2015. High precision landing site mapping and rover localization for Chang’e-3 mission. Science China Physics, Mechanics and Astronomy, 58(1): 1-11
53. 53.
    Liu Z Q, Peng M, Di K C, Wan W H, Liu B, Wang Y X, Xie B, Kou Y K, Wang B, Zhao C X and Zhang Y F. 2024. High-precision visual localization of the Chang’e-6 lander. National Remote Sensing Bulletin, 28(6): 1648-1655
54. 54.
    Liu Z Q, Wan W H, Peng M, Zhao Q, Xu B, Liu B, Liu Y L, Di K C, Li L C, Yu T Y, Wang B F, Zhou J L and Chen H M. 2014. Remote sensing mapping and localization techniques for teleoperation of Chang’e-3 rover. Journal of Remote Sensing (in Chinese), 18(5): 971-980
55. 55.
    Luhmann T, Robson S, Kyle S and Boehm J. 2023. Close-Range Photogrammetry and 3D Imaging. 4th ed. Berlin: De Gruyter
56. 56.
    Mazarico E, Neumann G A, Barker M K, Goossens S, Smith D E and Zuber M T. 2018. Orbit determination of the Lunar Reconnaissance Orbiter: status after seven years. Planetary and Space Science, 162: 2-19
57. 57.
    Mazarico E, Rowlands D D, Neumann G A, Smith D E, Torrence M H, Lemoine F G and Zuber M T. 2012. Orbit determination of the Lunar Reconnaissance Orbiter. Journal of Geodesy, 86(3): 193-207
58. 58.
    Niu R, Zhang G, Mu L L, Lin Y T, Liu J Z, Bo Z, Dai W and Zhang P. 2023. Scientific objectives and suggestions on landing site selection of manned lunar exploration engineering. Journal of Astronautics, 44(9): 1280-1290
59. 59.
    Ouyang Z Y. 2005. Introduction to Lunar Science. Beijing: China Astronautic Publishing House
60. 60.
    Pei Z Y, Liu J Z, Wang Q, Kang Y, Zou Y L, Zhang H, Zhang Y H, He H Y, Wang Q, Yang R H, Wang W and Ma J N. 2020. Overview of lunar exploration and International Lunar Research Station. Chinese Science Bulletin, 65(24): 2577-2586
61. 61.
    Peng M, Wan W H, Wu K, Liu Z Q, Li L, Di K C, Li L C, Miao Y and Zhan L. 2014. Topographic mapping capbility analysis of Chang’e-3 navcam stereo images and three-dimensional terrain reconstruction for mission operations. Journal of Remote Sensing (in Chinese), 18(5): 995-1002
62. 62.
    Rao R Z. 2021. Discussion on some key physical and technical problems about lunar laser ranging. Acta Optica Sinica, 41(1): 0112002
63. 63.
    Ren X, Liu J J, Li C L, Li H H, Yan W, Wang F F, Wang W R, Zhang X X, Gao X Y and Chen W L. 2019. A global adjustment method for photogrammetric processing of Chang’e-2 stereo images. IEEE Transactions on Geoscience and Remote Sensing, 57(9): 6832-6843
64. 64.
    Rindfleisch T. 1966. Photometric method for lunar topography. Photogrammetric Engineering, 32(2): 262-277
65. 65.
    Robinson M S, Brylow S M, Caplinger M A, Carter L M, Clark M J, Denevi B W, Estes N M, Humm D C, Mahanti P, Peckham D A, Ravine M A, Schaffner J A, Speyerer E J and Wagner R V. 2023. Shadowcam instrument and investigation overview. Journal of Astronomy and Space Sciences, 40(4): 149-171
66. 66.
    Sato H, Robinson M S, Hapke B, Denevi B W and Boyd A K. 2014. Resolved hapke parameter maps of the Moon. Journal of Geophysical Research: Planets, 119(8): 1775-1805
67. 67.
    Scholten F, Oberst J, Matz K D, Roatsch T, Wählisch M, Speyerer E J and Robinson M S. 2012. GLD100: the near-global lunar 100 m raster DTM from LROC WAC stereo image data. Journal of Geophysical Research: Planets, 117(E12): E00H17
68. 68.
    Schutz B E, Zwally H J, Shuman C A, Hancock D and Dimarzio J P. 2005. Overview of the ICESat mission. Geophysical Research Letters, 32(21): L21S01
69. 69.
    Smith D E, Zuber M T, Jackson G B, Cavanaugh J F, Neumann G A, Riris H, Sun X L, Zellar R S, Coltharp C, Connelly J, Katz R B, Kleyner I, Liiva P, Matuszeski A, Mazarico E M, Mcgarry J F, Novo-Gradac A M, Ott M N, Peters C, Ramos-Izquierdo L A, Ramsey L, Rowlands D D, Schmidt S, Scott V S, Shaw G B, Smith J C, Swinski J P, Torrence M H, Unger G, Yu A W and Zagwodzki T W. 2010. The lunar orbiter laser altimeter investigation on the Lunar Reconnaissance Orbiter mission. Space Science Reviews, 150(1): 209-241
70. 70.
    Smith D E, Zuber M T, Neumann G A, Mazarico E, Head J, Torrence M H and the LOLA Science Team. 2011. Results from the lunar orbiter laser altimeter (LOLA): global, high-resolution topographic mapping of the moon//42nd Lunar and Planetary Science Conference. The Woodlands: [s.n.]: 2350
71. 71.
    Speyerer E J, Robinson M S, Denevi B W and the LOLA Science Team. 2011. Lunar Reconnaissance Orbiter camera global morphological map of the moon//42nd Lunar and Planetary Science Conference. The Woodlands: [s.n.]: 2387
72. 72.
    Sun X, Cremons D R, Smith D E, Neumann G A, Mao D, Barker M K, Mazarico E, Cascioli G, Bertone S, Tomio H, Head J W III, Robinson M S, Aharonson O, Zuber M T, Petro1 N E, Veeramuthuvel P, Kumar G S and Megala S. 2024. First laser ranging results from the Lunar Reconnaissance Orbiter to the miniature laser retroreflector array on chandrayaan-3//55th LPSC. The Woodlands: LPI Contributions: 2259
73. 73.
    Tao Y, Muller J P, Xiong S T and Conway S J. 2021a. MADNet 2.0: pixel-scale topography retrieval from single-view orbital imagery of mars using deep learning. Remote Sensing, 13(21): 4220
74. 74.
    Tao Y, Xiong S T, Conway S J, Muller J P, Guimpier A, Fawdon P, Thomas N and Cremonese G. 2021b. Rapid single image-based DTM estimation from exomars TGO CaSSIS images using generative adversarial U-Nets. Remote Sensing, 13(15): 2877
75. 75.
    Tenthoff M, Wohlfarth K and Wöhler C. 2020. High resolution digital terrain models of mercury. Remote Sensing, 12(23): 3989
76. 76.
    Van Diggelen J. 1951. A photometric investigation of the slopes and the heights of the ranges of hills in the maria of the moon. Bulletin of the Astronomical Institutes of the Netherlands, 11: 283
77. 77.
    Wagner R V, Speyerer E J, Robinson M S and the LROC Team. 2015. New mosaicked data products from the lroc team//46th Lunar and Planetary Science Conference. The Woodlands: [s.n.]: 1473
78. 78.
    Wang Y X, Nan J, Zhao C X, Xie B, Gou S, Yue Z Y, Di K C, Zhang H, Deng X J and Sun S J. 2024. A catalogue of impact craters and surface age analysis in the Chang’e-6 landing area. Remote Sensing, 16(11): 2014
79. 79.
    Wang Z Z. 2007. The Principles of Photogrammetry. Wuhan: Wuhan University Press
80. 80.
    Wöhler C. 2004. Shape from shading under coplanar light sources//26th DAGM Symposium Pattern Recognition. Berlin: Springer: 278-285
81. 81.
    Wohlfarth K S, Liu W C, Wu B, Grumpe A and Wöhler C. 2018. High resolution digital terrain models of the martian surface: compensation of the atmosphere on ctx imagery//49th Lunar and Planetary Science Conference. The Woodlands: LPI: 2498
82. 82.
    Wu B, Huang J, Li Y, Wang Y R and Peng J. 2018. Rock abundance and crater density in the candidate Chang’e-5 landing region on the moon. Journal of Geophysical Research: Planets, 123(12): 3256-3272
83. 83.
    Wu B, Li F, Hu H, Zhao Y, Wang Y R, Xiao P P, Li Y, Liu W C, Chen L, Ge X M, Yang M, Xu Y Q, Ye Q, Wu X Y and Zhang H. 2020. Topographic and geomorphological mapping and analysis of the Chang'e-4 landing site on the far side of the moon. Photogrammetric Engineering and Remote Sensing, 86(4): 247-258
84. 84.
    Wu B, Li Y, Liu W C, Wang Y R, Li F, Zhao Y and Zhang H. 2021. Centimeter-resolution topographic modeling and fine-scale analysis of craters and rocks at the Chang’e-4 landing site. Earth and Planetary Science Letters, 553: 116666
85. 85.
    Wu W R, Liu J Z, Tang Y H, Yu D Y, Yu G B and Zhang Z. 2020. China lunar exploration program. Journal of Deep Space Exploration, 6(5): 405-416
86. 86.
    Xie B, Liu B, Di K, Zhang Y, Wang B, Zhao C. 2024. Analysis of the temporal and spatial characteristics of Lunar Reconnaissance Orbiter’s orbit error based on multi-coverage narrow angle camera images. Geo-Spatial Information Science
87. 87.
    Xin X, Liu B, Di K C, Yue Z Y and Gou S. 2020. Geometric quality assessment of Chang’e-2 global DEM product. Remote Sensing, 12(3): 526
88. 88.
    Ye Z, Li X W, Wang C, Dong X J, Yin H and Cao Q P. 2016. Survey of Technological Development of Optical Payload for Micro-nano Satellite. Spacecraft Engineering, 25(6): 122-130
89. 89.
    Yu J N, Liu K, Zhang B Y, Huang Y, Fan C Y, Song C Q and Tang G A. 2021. Vertical accuracy assessment and applicability analysis of TanDEM-X 90 m DEM in China. Journal of Geo-Information Science, 23(4): 646-657
90. 90.
    Yue Z Y, Di K C, Liu Z Q, Michael G, Jia M, Xin X, Liu B, Peng M and Liu J. 2019. Lunar regolith thickness deduced from concentric craters in the CE-5 landing area. Icarus, 329: 46-54
91. 91.
    Yue Z Y, Di K C, Wan W H, Liu Z Q, Gou S, Liu B, Peng M, Wang Y X, Jia M N, Liu J Z and Ouyang Z Y. 2022. Updated lunar cratering chronology model with the radiometric age of Chang’e-5 samples. Nature Astronomy, 6(5): 541-545
92. 92.
    Zhang Z X. 2004. Digital photogrammetry and computer vision. Geomatics and Information Science of Wuhan University, 29(12): 1035-1039, 1105
93. 93.
    Zhang Z X and Zhang J Q. 2002. Digital Photogrammetry. Wuhan: Wuhan University Press of Surveying and Mapping
94. 94.
    Zuber M T, Smith D E, Solomon S C, Muhleman D O, Head J W, Garvin J B, Abshire J B and Bufton J L. 1992. The mars observer laser altimeter investigation. Journal of Geophysical Research: Planets, 97(E5): 7781-7797