Assessing absolute and relative accuracy of recreation‐grade and mobile phone GNSS devices: a method for informing device choice
Assessing absolute and relative accuracy of recreation‐grade and mobile phone GNSS devices: a method for informing device choice
复制标题
评估娱乐级和移动电话 GNSS 设备的绝对和相对精度：一种告知设备选择的方法
作者：
M. Schaefer;Tara Woodyer
娱乐级接收器和移动的设备的可负担性/可用性和便携性，与商业调查全球导航卫星系统（GNSS）相比，通常被称为全球定位系统，使他们值得考虑的学生实地考察和研究。虽然目前关于低成本全球导航卫星系统接收器在开阔地区的相对准确度的经验证据有限，但初步调查结果表明，相对于绝对准确度而言，相对准确度水平使这些设备成为测量地物相对位置的一种廉价和易于管理的技术。鉴于全球导航卫星系统技术目前的发展速度，必须了解任何拟议装置的准确性。本文提出了一种评估各种设备的绝对和相对精度水平的方法，这可以为特定的测量项目选择设备提供信息。还可通过评估影响相对准确度的因素，如设备在记录某一点之前的稳定时间长度，来指明在研究和学习中使用全球导航卫星系统设备的“最佳做法"。此外，这种方法本身也是一种有用的练习，可以帮助学生更好地了解绝对和相对精度、他们自己的移动的硬件的功能以及娱乐级和移动的设备在学院内外的一系列场景中的潜在用途。
The affordability/availability and portability of recreation-grade receivers and mobile devices, compared with commercial survey Global Navigation Satellite Systems (GNSS), commonly referred to as Global Positioning System, make them worthy of consideration for student fieldwork and research. While empirical evidence of the relative accuracy of low-cost GNSS receivers in open areas is currently limited, initial findings suggest that levels of relative accuracy, as opposed to absolute accuracy, make these devices an inexpensive and manageable technology for measuring the relative location of land features. Given the current speed at which GNSS technology advances, it is important to have an appreciation of any proposed device's accuracy. This paper presents a method for evaluating the levels of absolute and relative accuracy of various devices, which can inform the choice of device for particular survey-based projects. It can also be used to indicate a ‘best practice’ approach to using GNSS devices in a research and study context, through an assessment of the factors influencing levels of relative accuracy, such as the length of time a device is left to settle before recording a point. In addition, this method can be a useful exercise in and of itself for helping students better understand absolute and relative accuracy, the capabilities of their own mobile hardware, and the potential use of recreation-grade and mobile devices in a range of scenarios both within and beyond the academy.