A 94-GHz dual-mode active/passive imager for remote sensing
A 94-GHz dual-mode active/passive imager for remote sensing
复制标题
用于遥感的 94 GHz 双模式主动/被动成像仪
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
D. Robertson
中科院分区：
文献类型：
--
作者：
D. Macfarlane;D. Robertson
我们提出了一种工作在94 GHz的双模雷达/辐射成像仪的开发和现场测试结果。该仪器将FMCW雷达与总功率辐射计结合在一个紧凑的便携式单元中，该单元是为地基遥感而设计的。该雷达产生距离图，距离单元分辨率为1米，最大距离约为5公里，目标反射率也可以反演。辐射计产生的现场与一个开尔文的顺序的热分辨率的共对齐的热图像。该仪器，它使用一个单一的0.45米卡塞格伦天线，是光栅在现场使用商业平移和倾斜万向节。图像采集时间大约为数十分钟。该仪器设计的主要应用是测量火山熔岩圆顶，无论天气条件如何-它被命名为AVTIS，即全天候火山地形成像传感器。我们将介绍与AVTIS从苏弗里埃尔山火山，蒙特塞拉特，以及更一般的地形测绘图像在苏格兰当地收集的结果。除了火山勘测外，AVTIS还可用于其他遥感应用。
We present the development and field testing results of a dual-mode radar/radiometric imager operating at 94GHz. This instrument combines an FMCW radar with a total power radiometer in a compact, portable unit which is designed for ground based remote sensing. The radar produces range maps with a range bin resolution of 1m out to a maximum range of approximately 5km and target reflectivity can also be retrieved. The radiometer produces co-aligned thermal images of the scene with a thermal resolution of the order of one kelvin. The instrument, which uses a single 0.45m Cassegrain antenna, is rastered over the scene using a commercial pan and tilt gimbal. Image acquisition times are of the order of tens of minutes. The principal application for which the instrument was designed is to survey volcanic lava domes, irrespective of weather conditions - it has been named AVTIS for All-weather Volcano Topography Imaging Sensor. We will present results obtained with AVTIS from the Soufrière Hills Volcano, Montserrat, as well as more general terrain mapping imagery gathered locally in Scotland. Besides volcano surveying, AVTIS could be deployed for other remote sensing applications.