Technical Note: Novel method for water vapour monitoring using wireless communication networks measurements
Technical Note: Novel method for water vapour monitoring using wireless communication networks measurements
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技术说明：使用无线通信网络测量进行水蒸气监测的新方法
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
H. Messer
中科院分区：
文献类型：
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作者：
N. David;P. Alpert;H. Messer
抽象的。我们提出了一种新技术，通过现有无线通信网络收集的数据估计湿度，克服了现有监测近地表水蒸气方法的障碍。天气条件和大气现象会影响电磁通道，导致无线电信号衰减。因此，无线通信网络实际上是内置的环境监测设施。这些网络中使用的无线微波链路被蜂窝提供商广泛部署，用于距地面几十米的基站之间的回程通信。因此，如果使用所有可用的测量，所提出的方法可以提供具有高空间分辨率和潜在高时间分辨率的湿度观测。此外，实施成本最低，因为所使用的数据已经由蜂窝运营商收集和保存。此外，许多链路安装在难以到达的地区，例如地形和复杂地形。因此，我们的方法可以在过去难以测量或以前从未测量过的地方进行测量。该技术仅限于传播路径上排除雨、雾或云的天气条件。可能导致链路发射器或接收器（或两者）移动的强风也可能干扰进行精确测量的能力。我们展示了从回程蜂窝网络中使用的两个微波链路获取的实际数据测量结果，这些结果显示出与地面站湿度测量结果令人信服的相关性。每天在两个地点进行测量，一个位于以色列北部（28 次测量），另一个位于以色列中部（29 次测量）。对于北部和中部站点，微波链路测量值与湿度计之间的相关性分别为 0.9 和 0.82。北部和中部站点测量的均方根差 (RMSD) 分别为 1.8 g/m3 和 3.4 g/m3。
Abstract. We propose a new technique that overcomes the obstacles of the existing methods for monitoring near-surface water vapour, by estimating humidity from data collected through existing wireless communication networks. Weather conditions and atmospheric phenomena affect the electromagnetic channel, causing attenuations to the radio signals. Thus, wireless communication networks are in effect built-in environmental monitoring facilities. The wireless microwave links, used in these networks, are widely deployed by cellular providers for backhaul communication between base stations, a few tens of meters above ground level. As a result, if all available measurements are used, the proposed method can provide moisture observations with high spatial resolution and potentially high temporal resolution. Further, the implementation cost is minimal, since the data used are already collected and saved by the cellular operators. In addition – many of these links are installed in areas where access is difficult such as orographic terrain and complex topography. As such, our method enables measurements in places that have been hard to measure in the past, or have never been measured before. The technique is restricted to weather conditions which exclude rain, fog or clouds along the propagation path. Strong winds that may cause movement of the link transmitter or receiver (or both) may also interfere with the ability to conduct accurate measurements. We present results from real-data measurements taken from two microwave links used in a backhaul cellular network that show convincing correlation to surface station humidity measurements. The measurements were taken daily in two sites, one in northern Israel (28 measurements), the other in central Israel (29 measurements). The correlation between the microwave link measurements and the humidity gauges were 0.9 and 0.82 for the north and central sites, respectively. The Root Mean Square Differences (RMSD) were 1.8 g/m3 and 3.4 g/m3 for the northern and central site measurements, respectively.