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Differential Absorption Radar at 170 GHz for Atmospheric Boundary Layer Water Vapor Profiling

机译：大气边界层水汽分析的170 GHz差分吸收雷达

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We are developing a frequency-modulated continuous-wave (FMCW) radar between 167 and 174.8 GHz to measure differential absorption due to water vapor within the atmospheric boundary layer. In this work, we report on single-frequency measurements performed within this band in the presence of precipitating clouds. Despite the relatively low transmit power of 6-10 dBm, the high transmit/receive isolation and low noise figure of the system enables detection of radar echos from rain or clouds with high signal-to-noise ratio (SNR) out to about one kilometer. This work builds on technology developed and measurements performed in our group in the 183.5 to 193 GHz band, which is subject to transmission restrictions due to passive remote sensing platforms that rely on those frequencies.
机译：我们正在开发一个介于167和174.8 GHz之间的调频连续波（FMCW）雷达，以测量大气边界层中水蒸气引起的差分吸收。在这项工作中，我们报告了在有降水云的情况下在该频段内执行的单频测量。尽管6-10 dBm的发射功率相对较低，但该系统的高发射/接收隔离度和低噪声系数使它能够检测到雨水或云的雷达回波，信噪比（SNR）高至大约一公里。这项工作建立在我们小组在183.5至193 GHz频带中开发和执行的测量技术的基础上，由于无源遥感平台依赖这些频率，因此受到传输限制。

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