Ultra-Wideband Bistatic Radar Measurements of Snow

IF 6.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE journal of microwaves Pub Date : 2024-09-30 DOI:10.1109/JMW.2024.3453941

Omid Reyhanigalangashi;Siva-Prasad Gogineni;Drew Taylor;Shriniwas Kolpuke;Feras Abushakra;Jordan D. Larson;Aabhash Bhandari

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Abstract

This paper presents the development of an ultra-wideband bistatic radar operating over the frequency range of 0.7–2.1 GHz based on the Radio-Frequency System-on-Chip (RF-SoC) platform and its application to snow measurements. The system utilizes Global Positioning System Disciplined Oscillators (GPS-DO) to synchronize the transmitter and receiver mounted on two small unmanned aerial systems (sUAS). We developed an arbitrary waveform generator to synthesize and transmit chirp signals. A data acquisition system was designed to capture signals with up to 2.2 GHz bandwidth and record the radar data. The transmit and receive antennas were developed using a four-element Vivaldi antenna array over the operating frequency range. Bistatic measurements were performed to determine the Brewster angle to estimate snow dielectric properties. The separation, incidence, and reflection angles were adjusted to collect radar data over an angular region extending from 27 to 68 degrees over snow at the Study of Precipitation, the Lower Atmosphere and Surface for Hydrometeorology (SPLASH) field site near Gothic, Colorado.

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超宽带双稳态雷达对雪的测量

本文介绍了基于射频片上系统（RF-SoC）平台开发的工作频率范围为 0.7-2.1 GHz 的超宽带双稳态雷达及其在雪地测量中的应用。该系统利用全球定位系统自律振荡器（GPS-DO）来同步安装在两个小型无人机系统（sUAS）上的发射器和接收器。我们开发了一种任意波形发生器，用于合成和发射啁啾信号。我们还设计了一个数据采集系统，用于捕获带宽高达 2.2 GHz 的信号并记录雷达数据。发射和接收天线是在工作频率范围内使用四元维瓦尔第天线阵列开发的。进行了静态测量以确定布儒斯特角，从而估算出雪的介电性质。对分离角、入射角和反射角进行了调整，以便在科罗拉多州戈蒂克附近的降水、低层大气和表面水文气象研究（SPLASH）野外观测点的积雪上方从 27 度到 68 度的角度区域内收集雷达数据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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