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A prototype wireless sensor network system for a comparative evaluation of differential and absolute barometric altimetry

机译:无线传感器网络原型系统,用于差分和绝对气压测高的比较评估

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摘要

Vertical distance measurements from height h to a reference position, as a variable independent of xy coordinates, can be attained from altitude measurements. Nowadays, the prevailing systems for determining altitude employ either a Global Positioning System (GPS) receiver or a barometric pressure sensor. The GPS altimeter receives coordinates from at least four satellites and calculates geometric altitude from the mean sea level (MSL). The barometric altimeter, on the other hand, measures the pressure applied by the weight of air molecules. Because ambient air pressure decreases at a standard rate as elevation increases, the altimeter determines changes in barometric altitude in reference to either the International Standard Atmosphere (ISA = 1023.25hPa at 15°C), or the local sea level pressure. Acquiring and subtracting altitudes of two distinct positions results in the vertical distance in-between them.
机译:从高度h到参考位置的垂直距离测量值(独立于xy坐标)可以从高度测量值中获得。如今,用于确定高度的流行系统采用全球定位系统(GPS)接收器或大气压力传感器。 GPS高度计从至少四个卫星接收坐标,并从平均海平面(MSL)计算几何高度。另一方面,气压高度计测量由空气分子的重量施加的压力。由于环境气压会随着海拔的升高而以标准速率降低,因此高度计会参考国际标准大气(15°C下的ISA = 1023.25hPa)或当地海平面压力来确定气压高度的变化。获取和减去两个不同位置的高度会导致它们之间的垂直距离。

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