Abstract

A model and a software module were developed to analyze the shape of the trajectory described by the subsatellite point on the Earth’s surface depending on eccentricity, perigee angle, and inclination of the geosynchronous orbit (GEO). For various parameters of the satellite’s orbit and synthetic aperture radar (SAR) equipment, we built the dependences of the geometric resolution in the longitudinal (azimuthal) and transverse (relative to the trajectory of the subsatellite point) direction, as well as the radiometric sensitivity of a SAR operating in GEO in the bistatic oblique quasi-specular mode of wave reflection from the Earth’s surface. The optimal time shifts of the orbital positions of two satellites constituting a bistatic pair were found, at which the specified restrictions on the SAR parameters are fulfilled for observation points in a wide area of ​​the Earth’s surface for a long time interval. A generalized assessment of a set of SAR parameters (transmitter and receiver antenna areas, size of the resolution element, and average transmitter power) that provides a given level of radiometric sensitivity is performed.

中文翻译：

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地球同步轨道上双基地合成孔径雷达的几何分辨率和能量势的计算

摘要

开发了一个模型和软件模块，以根据偏心率，近地角和地球同步轨道（GEO）的倾角来分析地球表面亚卫星点所描述的轨迹形状。对于卫星轨道和合成孔径雷达（SAR）设备的各种参数，我们建立了纵向（方位角）和横向（相对于亚卫星点的轨迹）方向上的几何分辨率以及辐射灵敏度的依赖关系在地球静止轨道上以地基波反射的双基地斜准镜面反射模式运行的SAR的示意图。找到了构成双基地对的两颗卫星的轨道位置的最佳时移，在较长的时间间隔内，对于地表大面积区域中的观测点，都满足了SAR参数的指定限制。对提供给定辐射敏感度水平的一组SAR参数（发射器和接收器天线面积，分辨率元素的大小以及平均发射器功率）进行了通用评估。