[1] [1] GIBERT X, PATEL V M, CHELLAPPA R. Deep multitask learning for railway track inspection[J]. IEEE transactions on intelligent transportation systems, 2017, 18(1):153-164.

[2] [2] LUO J, FAN Y K, JIANG P, et al. Vehicle platform attitude estimation method based on adaptive Kalman filter and sliding window least squares[J]. Measurement science and technology, 2021, 2(3):03500.

[3] [3] KARAMAT T B, ATIA M M, NOURELDIN A. Performance analysis of code-phase-based relative GPS positioning and its integration with land vehicle’s motion sensors[J]. IEEE sensors journal, 2014, 14(9): 3084-3100.

[4] [4] ROHANI M, GINGRAS D, GRUYER D. A novel approach for improved vehicular positioning using cooperative map matching and dynamic base station DGPS concept[J]. IEEE transactions on intelligent transportation systems, 2016, 17(1):1-10.

[5] [5] PAULI M, GOETTEL B, SCHERR S, et al. Miniaturized millimeter-wave radar sensor for high-accuracy applications[J]. IEEE transactions on microwave theory and techniques, 2017, 65(5):1707-1715.

[6] [6] AN S N, HE Z X, LI J G, et al. Micrometer accuracy phase modulated radar for distance measurement and monitoring[J]. IEEE sensors journal, 2020, 20(6): 2919-2927.

[7] [7] Qi J Y, WANG Z, HUANG J H, et al. Heterodyne interferometer with two parallel-polarized input beams for high-resolution roll angle measurement[J]. Optics express, 2019, 27(10):13820-13830.

[8] [8] WANG X L, XIONG Y B, XU H Z, et al. Laser self-mixing interferometer with scalable fringe precision based on phase multiplication algorithm[J]. Optoelectronics letters, 2021, 17(11):665-668.

[9] [9] ZHANG E Z, CHEN B Y, ZHENG H, et al. Laser heterodyne interferometer with rotational error compensation for precision displacement measurement[J]. Optics express, 2018, 26(1):90-98.

[10] [10] LI J, LIU Z L. Efficient camera self-calibration method for remote sensing photogrammetry[J]. Optical express, 2018, 26(11):14213.

[11] [11] GAN Y, ZHANG J H, CHEN K Q, et al. A dynamic detection method to improve SLAM performance[J]. Optoelectronics letters, 2021, 17(11):693-698.

[12] [12] LI J, LIU Z L. Image quality enhancement method for on-orbit remote sensing cameras using invariable modulation transfer function[J]. Optics express, 2017, 25(15):17134-17149.

[13] [13] DONG H X, FU Q, ZHAO X, et al. Practical rotation angle measurement method by monocular vision[J]. Applied optics, 2015, 54(3):425-435.

[14] [14] SüSS M, KOCH D, PALUSZEK H. The sardinia radio telescope (SRT) optical alignment[J]. Proc. SPIE, 2012, 8444:84442G.

[15] [15] ACEITUNO J F, CHAMORRO R, MU?OZ S, et al. An alternative procedure to measure railroad track irregularities. Application to a scaled track[J]. Measurement, 2019, 137:417-427.

[16] [16] PENG L, ZHENG S, LI P, et al. A comprehensive detection system for track geometry using fused vision and inertia[J]. IEEE transactions on instrumentation and measurement, 2020, 70:1-15.

[17] [17] ARAKANTSEV K G, ZHUKOV D V, KONYAKHIN I A. Methods of data processing and estimation of measuring accuracy in stereoscopic system for the control of objects displacements[C]//6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8-10, 2010, Hangzhou, China. California:SPIE, 2010:75446E.

[18] [18] VASILEV A S, KONYAKHIN I A, TIMOFEEV A V, et al. Electrooptic converter to control linear displacements of the large structures of the buildings and facilities[C]//SPIE Optical Metrology, June 21-25, 2015, Munich, Germany. California:SPIE, 2015: 95252W.

[19] [19] SHAVRYGINA M A, KONYAKHIN I A, TIMOFEEV A N, et al. Optical-electronic system controlling the position of a railway track with the help of reference marks[C]//SPIE Photonics Europe, April 3-7, 2016, Brussels, Belgium. California:SPIE, 2016:988916.

[20] [20] HEIKKINEN V, BYMAN V, PALOSUO I, et al. Interferometric 2D small angle generator for autocollimator calibration[J]. Metrologia, 2017, 54(3): 253-261.

[21] [21] SCHUMANN M, GECKELER R D, KRAUSE M, et al. The spatial angle autocollimator calibrator:optimised model, uncertainty budget and experimental validation[J]. Metrologia, 2019, 56(1):015011.

[22] [22] CHEN Y L, SHIMIZU Y, TAMADA J, et al. Mode-locked laser autocollimator with an expanded measurement range[J]. Optics express, 2016, 24(14): 15554-15569.

[23] [23] Camera calibration toolbox for MATLAB[EB/OL]. (2015-10-14) [2021-11-10]. http://www.vision.caltech.edu/bouguetj/calib_doc.

[24] [24] MathWorks. Camera Calibrator[EB/OL]. [2021-11-10].https: //www.mathworks.com/help/vision/ref/cameracalibrator-app.html.