A new challenge for cadastral surveying in Taiwan: feasibility analysis using combination on CORS data and online PPP service

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-07-26 DOI:10.1515/jag-2024-0036

M. Ho, Ta-Kang Yeh, Tung-Shan Liao, Y. Chung

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引用次数: 0

Abstract

Relative GNSS positioning, a longstanding measurement standard, often incurs high manpower and equipment costs. Online Precise Point Positioning (PPP) presents a cost-effective alternative by minimizing these expenses. However, transitioning from the ITRF2014 to the TWD97[2010] coordinate system presents unique challenges. This study evaluates the efficacy of five PPP services – AUSPOS, OPUS, CSRS-PPP, magicGNSS, and RTX-PP – using 2018 Continuously Operating Reference Stations (CORS) data. Following a seven-parameter transformation, we systematically compared these services to identify the optimal solution for Taiwan’s geodetic survey needs. Our analysis reveals that RTX-PP offers superior performance, achieving 1 cm accuracy over 24 h and 4 cm accuracy over 1 h. Most stations met these accuracy standards, even during short observation intervals from September 9, 2018. Nonetheless, there is a 24.1 % likelihood of exceeding the 6 cm accuracy threshold due to variations in GNSS data quality. To address this, we employed G-Nut software to analyze station data quality across regions, recommending station selection based on data ratio and cycle slips to improve PPP solution accuracy effectively.

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台湾地籍测量的新挑战：结合 CORS 数据和在线 PPP 服务的可行性分析

全球导航卫星系统的相对定位是一项历史悠久的测量标准，通常需要高昂的人力和设备成本。在线精确点定位（PPP）最大程度地降低了这些成本，是一种具有成本效益的替代方法。然而，从 ITRF2014 到 TWD97[2010] 坐标系的过渡带来了独特的挑战。本研究利用 2018 年连续运行基准站（CORS）数据评估了五种 PPP 服务（AUSPOS、OPUS、CSRS-PPP、magicGNSS 和 RTX-PP）的功效。根据七参数转换，我们系统地比较了这些服务，以确定满足台湾大地测量需求的最佳解决方案。我们的分析表明，RTX-PP 性能优越，可在 24 小时内达到 1 厘米的精度，在 1 小时内达到 4 厘米的精度。即使从 2018 年 9 月 9 日起的短时间观测间隔内，大多数站点也达到了这些精度标准。然而，由于 GNSS 数据质量的变化，超过 6 厘米精度阈值的可能性为 24.1%。针对这一问题，我们采用G-Nut软件对各区域的台站数据质量进行分析，根据数据比和周期滑移推荐台站选择，以有效提高PPP解算精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.