Tên bài báo:
Determination of Local Height Using Global Positioning System with Low Price Receivers- Tác giả:
- Vũ Ngọc Quang
- Tham gia cùng:
- Nguyễn Văn Thịnh
- Tạp chí:
- International Journal of Civil Engineering and Technology
- Năm xuất bản:
- 2018
- Trang:
- Từ trang 1575 đến trang 1582
- Lĩnh vực:
- Kỹ thuật xây dựng công trình giao thông
- Phạm vi:
- Quốc tế
Tóm tắt:
This paper considers ability of replacing conventional method that uses leveling equipment and bar staff by using Global Positioning System (GPS) in establishing technical and IV class leveling networks in a very narrow area. These are two leveling classes that are widely used in the real projects. Surveyors can thus save time, reduce expense in production outside and still ensure the required accuracy. Methods: In this study, local heights will be calculated using 2008 Earth Gravitational Model (EGM 2008) combines with bilinear interpolation function or determined directly using GPS technique and will then be compared with local heights after adjustment using conventional geometrical leveling method. Geometrical leveling networks will be adjusted using specific software. Adjusted local heights are original heights to compare with those from other methods. The results of study are remarkable and prove that GPS technology can be applied as a major method to determine local heights and the Cm accuracy can be surely reached even using low price GPS receivers and common software in reality of works. Application: This method can be used to quickly determine local heights in reality and reduce considerably expense and time of work.
