| 摘要: |
| 无验潮水深测量是目前水深测量中常用的作业方法之一，主要采用实时动态差分定位
（RTK）或后处理动态差分定位（PPK）的技术方法，广泛应用于内陆河道、水库、湖泊及沿海 近岸的水下地形测量。文章基于无验潮水深测量的基本原理和技术核心，针对在离岸较远、无基 站且无网络的环境下 RTK 技术与 PPK 技术受限而无法获取高精度的高程观测信息这一前提，使用天宝实时扩展精密定位技术（Trimble RTX）获取高精度的全球导航卫星系统（GNSS）高程数据，并通过快速傅里叶变换（FFT）低通滤波提取水位高程，实现无验潮水深测量，并将其与传 统的验潮模式和 PPK 无验潮模式进行分析对比。实验结果表明，使用该技术无须建立陆地基准站，能够实现高精度水位高程观测，其作业范围更广、效率更高，测量精度满足水深测量的技术 要求，为无验潮水深测量提供了新的技术模式，可大范围应用于海洋水下地形测量。 |
| 关键词: 无验潮 天宝实时扩展精密定位技术（Trimble RTX） 水深测量 后处理动态差分定位
（PPK） |
| DOI：10.20016/j.cnki.hykfygl.20260729.001 |
| 投稿时间：2025-07-22修订日期：2026-02-12 |
| 基金项目: |
|
| Application of Trimble RTX Technology in Tide-Independent Bathymetric Surveying |
| WANG Jie，CAO Kaixiang，ZHANG Chao，LI Donghui1，LYU Xinyi |
| Qingdao Huanhai Offshore Engineering Survey Institute Co.，Ltd.;North China Sea Survey Center，MNR |
| Abstract: |
| Tide-independent bathymetric surveying is currently one of the commonly used methods in hydrographic surveying，primarily employing Real-Time Kinematic（RTK）or Post-Processed Kinematic（PPK） techniques．It is widely applied in underwater topographic mapping of inland rivers，reservoirs，lakes，and coastal areas．Based on the fundamental principles and core techniques of tide-independent bathymetry，this paper addresses the limitations of RTK and PPK technologies in obtaining high-precision elevation observations in remote offshore environments lacking base stations and network coverage．Trimble Real Time eXtended（Trimble RTX）technology is utilized to acquire high-precision Global Navigation Satellite System（GNSS）elevation data，from which water level elevation is extracted via Fast Fourier Transform（FFT）low-pass filtering，thereby realizing tide-independent bathymetric surveying．A comparative analysis is conducted between this method，the traditional tidal observation mode，and the PPK-based tide-independent mode．Experimental results demonstrate that this technique achieves high-precision water level elevation observations without the need for establishing a land-based reference station．It offers a broader operational range and higher efficiency，and its measurement accuracy meets the technical requirements for bathymetric surveying．This approach provides a new technical model for tide-independent bathymetry and can be extensively applied in marine underwater topographic mapping． |
| Key words: Tide-Independent Trimble Real Time eXtended（Trimble RTX） Bathymetric surveying Post- Processed Kinematic（PPK） |
