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In-Orbit Analysis of Antenna Pattern Anomalies of GNSS Satellites

机译:GNSS卫星天线方向图异常的在轨分析

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摘要

The payload of a typical navigation satellite encounters heavy strains during launch. This indicates the need to characterize and assess the antenna and consequently the total signal performance of a satellite in orbit. Using ground measurements with a high gain antenna seems to be a powerful basis for this analysis. This paper introduces the used measurement facility and strategies for obtaining a sufficient amount of measurement data based on the used simplified satellite attitude and yaw steering model. The analysis algorithms will be described in detail and as a side product it will be shown that transmitter power variations of the navigation satellite over time can be characterized and separated from the pure influence of the satellite antenna. The last section presents the exemplary antenna pattern characterization for the second Galileo test satellite GIOVE-B (Galileo In-Orbit Validation Element) based on calibrated flux density measurements taken with DLR's 30 m high gain antenna for the El frequency band.
机译:典型的导航卫星的有效载荷在发射过程中会承受很大的压力。这表明需要表征和评估天线,从而评估和评估在轨卫星的总体信号性能。通过高增益天线进行地面测量似乎是进行此分析的有力依据。本文介绍了所使用的测量工具以及基于所使用的简化卫星姿态和偏航操纵模型获得足够数量的测量数据的策略。将详细描述分析算法,并且作为副产品将显示,可以表征导航卫星随时间的发射机功率变化,并将其与卫星天线的纯影响分开。最后一部分介绍了第二个伽利略测试卫星GIOVE-B(伽利略在轨验证元件)的示例性天线方向图表征,该数字基于使用ELR频段的DLR 30 m高增益天线进行的校准磁通密度测量。

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  • 来源
    《Navigation》 |2012年第2期|p.135-144|共10页
  • 作者单位

    German Aerospace Center (DLR), Institute of Communications and Navigation, Oberpfaffenhofen, Germany 82234;

    German Aerospace Center (DLR), Institute of Communications and Navigation, Oberpfaffenhofen, Germany 82234;

    German Aerospace Center (DLR), Institute of Communications and Navigation, Oberpfaffenhofen, Germany 82234;

  • 收录信息 美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
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