TY - JOUR A1 - Liu, Y. A1 - Wang, C. A1 - Luo, G. A1 - Ji, W. T1 - Design and Applications of Drilling Trajectory Measurement Instrumentation in Ultra-deep Borehole Based on Fiber Optic Gyro JO - Geosci. Instrum. Method. Data Syst. Discuss. J1 - GID VL - 2019 SP - 1 EP - 45 Y1 - 2019/11/21 PB - Copernicus Publications SN - 2193-0872 UR - https://gi.copernicus.org/preprints/gi-2019-39/ L1 - https://gi.copernicus.org/preprints/gi-2019-39/gi-2019-39.pdf DO - 10.5194/gi-2019-39 ER -