Investigation in designing and developing the GNSS positioning instrumentation used in measurement and mapping by CORS/RTK technology
Abstract
Currently, in addition to GNSS receivers manufactured by foreign companies and imported into Vietnam, there are some domestically produced products with lower prices on the market. This paper presents an investigation on the design and development of a low-cost and high-precision GNSS device, used for CORS/RTK measurement in establishing topographic and cadastral maps. The developed GNSS device consists of a GNSS satellite antenna, a receiver, and an electronic field-book (using a smartphone device) installed with a self - developed software. The GNSS receiver is developed based on the technology and equipment of Drotek company (France). The components of the GNSS receiver have been selected and designed with functionality for both dynamic and static measurement modes. The GNSS receiver and electronic field-book are connected wirelessly via the Bluetooth module, allowing convenient operation with the receiver. Experiments were conducted to measure the parallel points of an established geodetic network using GPS technology. The possitioning data was measured by two receivers, South’s S82 (China) and self-developed KX20-R, using RTK method with a single CORS station installed at the University of Mining and Geology. The results showed that the developed GNSS positioning device provides an accuracy of centimeters and completely meet the requirements of large-scale topographic and cadastral surveying and mapping.References
https://store - drotek.com/891 - 1023 - rtk - zed - f9p - gnss.html#/105 - case – without.
Hu, G. R., Khoo, H. S., Goh, P. C., & Law, C. L. (2003). Development and assessment of GPS virtual reference stations for RTK positioning. Journal of Geodesy, 77(5), 292-302.
Hwang, J., Yun, H., Park, S. K., Lee, D., & Hong, S. (2012a). Optimal methods of RTK-GPS/accelerometer integration to monitor the displacement of structures. Sensors, 12(1), 1014-1034.
Hwang, J., Yun, H., Suh, Y., Cho, J., & Lee, D. (2012b). Development of an RTK-GPS positioning application with an improved position error model for smartphones. Sensors, 12(10), 12988-13001.
Lee, H. (2010). An integration of GPS with INS sensors for precise long-baseline kinematic positioning. Sensors, 10(10), 9424-9438.
Manurung, P., Pramujo, H., & Manurung, J. B. (2019). Development of GNSS receiver for mobile CORS with RTK correction services using cloud server. In E3S Web of Conferences (Vol. 94, p. 01010). EDP Sciences.
Pham, C. K., Nguyen, Q. L. (2019). Accuracy assessment of the single CORS technology for establishing the large scale cadastral map. International Journal of Scientific & Engineering Research, 10(4). 113-123. ISSN 2229-5518.
Phạm, C. K., Trần, T. X. (2018). Nghiên cứu phát triển hệ thống quan trắc chuyển dịch biến dạng công trình theo thời gian thực. Tạp chí công nghiệp mỏ, 4, 33-38.
Tạ, H. T. (2016). Nghiên cứu chế tạo hệ thống cung cấp dịch vụ định vị GPS độ chính xác cm trong thời gia thực cho các lĩnh vực đòi hỏi độ chính xác cao. Báo cáo kết quả nghiên cứu đề tài, mã số VT/CN - 02/13-15
Trajkovski, K. K, Sterle, O., & Stopar, B. (2010). Study positioning with high sensitivity GPS sensors under adverse conditions. Sensors, 10, 8332-8347.
Thông tư 68/2015/TT-BTNMT. (2015). Quy định kỹ thuật đo đạc trực tiếp địa hình phục vụ thành lập bản đồ địa hình và cơ sở dữ liệu nền địa lý tỷ lệ 1:500, 1:1000, 1:2000, 1:5000.
