[1] HIRT C, BVRKI B, SOMIESKI A. Modern determination of vertical deflections using digital zenith cameras[J]. Journal of Surveying Engineering, 2010, 136(1): 1-12.
[2] KEREM H, RASIM D, HALUK O. Digital zenith camera system for Astro-Geodetic applications in Turkey[J]. Journal of Geodesy and Geoinformation, 2012, 1(2): 115-120.
[3] LIU X Y, ZHOU Z F, ZHANG Z L, et al. Improvement of star identification based on star trace in images[J]. Measurement, 2017, 105: 158-163.
[5] GUO Min, ZHANG Hong-ying. Application of CCD digital photography in astronomical positioning measurement[J]. Geomatics Technology and Equipment, 2015, 44(4): 1254-1259.
[6] WANG Bo, TIAN Li-li, WANG Zheng, et al. The image and data processing in digital zenith camera[J]. Chinese Science Bulletin, 2014, 59(12): 1100- 1107.
[8] ZHAI Guang-qing, AI Gui-bin. Digital zenith camera astronomical positioning measurement of project implementation[J]. Journal of Geomatics Science and Technology, 2014, 31(3): 232-235.
[11] CHANG Jun-qin. Calculation of state parameters of clinometer in digital zenith camera[J]. Technical Study, 2017, 4: 118-119.
[12] ZHANG Xi-hui, ZHOU Zhao-fa, LIU Xian-yi, et al. Tilt error analysis of digital zenith Instrument positioning at large dip angle[J]. Acta Armamentarii, 2014, 33(10): 14-16.
[13] FAN Rui, SHI Lei. Nonlinear error compensation and anti-jamming technology of digital clinometer[J]. Instrument Technique and Sensor, 2013(5): 36-38.
[14] ZHOU Zhao-fa, LIU Xian-yi, ZHANG Zhi-li, et al. Research on two-axis tilt sensor based on digital zenith camera[J]. Acta Photonica Sinica, 2015, 44(8): 0812002.