Water Surface Height Determination with a GPS Wave Glider: A Demonstration in Loch Ness, Scotland
Water Surface Height Determination with a GPS Wave Glider: A Demonstration in Loch Ness, Scotland
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DOI：
10.1175/jtech-d-15-0162.1
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发表时间：
2016-05
影响因子：
2.2
通讯作者：
M. Maqueda;N. Penna;S. Williams;P. Foden;I. Martin;J. Pugh
中科院分区：
文献类型：
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作者：
M. Maqueda;N. Penna;S. Williams;P. Foden;I. Martin;J. Pugh
摘要在无人水面航行器Wave Glider上安装了大地测量GPS接收机。使用动态精确点定位（PPP）GPS（在全球范围内运行，无需直接需要参考站），可以以约0.05 m的精度测量表面高度。GPS波浪滑翔机在苏格兰的洛赫湖进行了测试，通过测量洛赫表面高度的梯度。实验是在温和的天气下进行的，洛赫几乎没有沿着的风，波场主要由涟漪和小波组成。在此条件下，洛赫的表面高度梯度应近似等于大地水准面坡度。PPP表面高度梯度和地球重力模型2008大地水准面高度梯度确实在沿着洛赫（0.03 m km−1）的平均值上一致。此外，还检测到1）由于水力发电的日常抽水而引起的0.05 m左右的高度变化和2）由表面波引起的高频（0.25-0.5 Hz）振荡。PPP高度比较有利（~0.02-m...
AbstractA geodetic GPS receiver has been installed on a Wave Glider, an unmanned water surface vehicle. Using kinematic precise point positioning (PPP) GPS, which operates globally without directly requiring reference stations, surface heights are measured with ~0.05-m precision. The GPS Wave Glider was tested in Loch Ness, Scotland, by measuring the gradient of the loch’s surface height. The experiment took place under mild weather, with virtually no wind setup along the loch and a wave field made mostly of ripples and wavelets. Under these conditions, the loch’s surface height gradient should be approximately equal to the geoid slope. The PPP surface height gradient and that of the Earth Gravitational Model 2008 geoid heights do indeed agree on average along the loch (0.03 m km−1). Also detected are 1) ~0.05-m-sized height changes due to daily water pumping for hydroelectricity generation and 2) high-frequency (0.25–0.5 Hz) oscillations caused by surface waves. The PPP heights compare favorably (~0.02-m...