A Proposal to install and Operate a Spaced Antenna Radar as Part of a Mesoscale profiler network in Illinois

一个50兆赫的间隔天线/成像多普勒干涉仪系统将被转移到伊利诺伊州弗拉特兰雷达附近的一个位置，并在那里运行三年。目标是在厄尔巴纳附近建立一个中尺度网络，该网络由三部雷达组成，呈三角形排列，平均间隔约20公里。在厄尔巴纳附近已有的两部雷达基础上增加这一新设施，将能够测量中尺度和微尺度气象系统演变过程中的一些重要参数，包括水平和垂直速度、涡度、散度、切变、变形和涡度方程倾斜项。间隔天线/IDI系统的特殊能力还将使人们能够研究造成回波、等熵面倾斜的散射机制，以及可能在30-50m空间尺度上的小尺度涡度、散度和涡度倾斜项，即间隔天线系统中天线间隔的尺度特性。在网络中增加第三个雷达，可以得到的信息和可以进行的研究的数量比使用一个或两个雷达所能达到的效果增加了十倍以上。

A 50-MHz spaced antenna/imaging Doppler interferometer system will be moved to a location near the Flatland radar in Illinois and to operate it there for a period of three years. The goal is to establish a mesoscale network near Urbana consisting of three radars in a triangular array with an average separation of approximately 20 km. The addition of the new facility to the two radars already operating near Urbana will allow measurements of a number of parameters important in the evolution of mesoscale and microscale meteorological systems, including horizontal and vertical velocities, vorticity, divergence, shears, deformation, and the vorticity equation tilting terms. The special capabilities of the spaced antenna/IDI system will also allow a study of the scattering mechanisms responsible for the echoes, the tilts of isentropic surfaces, and possibly the small-scale vorticity, divergence, and vorticity tilting terms on a spatial scale of 30-50 m, i.e., the scale characteristic of the separation of the antennas in the spaced antenna system. The addition of a third radar to the network increases the information that can be derived and the number of studies that can be carried out by more than a factor of ten over what can be achieved with either one or two radars.