Cloud profiling radar for EarthCARE mission
Cloud profiling radar for EarthCARE mission
复制标题
用于 EarthCARE 任务的云剖面雷达
DOI：
10.1117/12.469124
复制
发表时间：
2003
影响因子：
4.4
通讯作者：
T. Orikasa
中科院分区：
文献类型：
--
作者：
H. Kumagai;H. Kuroiwa;Satoru Kobayashi;T. Orikasa
根据迄今为止进行的初步设计研究，描述了用于EarthCARE的云剖面雷达（CPR）的概念和预期性能。高灵敏度和多普勒能力是该CPR的两个重要新特点。其中，多普勒能力是星载大气雷达的首次尝试，在技术开发和可行性验证方面需要付出很大的努力。我们开发了一种新的数值模拟方法来评估适用于这种应用的多普勒速度精度，并将结果与传统的近似方法进行了比较。通过与数值方法的比较，说明了近似方法的有效性和局限性。结果表明，该方法可以满足雷达灵敏度和多普勒测量的要求。然而，由于这些对CPR的要求非常苛刻，因此有必要对设计优化和评估技术开发进行进一步的详细研究。在对脉冲重复频率（PRF）要求很高的雷达工作条件下，天线旁瓣引起的表面杂波干扰是一个重要问题。对这一问题进行了分析，并对天线副瓣提出了初步要求。
Concept and expected performance of cloud profiling radar (CPR) for EarthCARE are described based on preliminary design study conducted to date. High sensitivity and Doppler capability are two significant new features in this CPR. Particularly, Doppler capability is the first attempt to spaceborne atmospheric radar, which requires great efforts in technical development and feasibility validation. We have developed a new numerical simulation method to assess Doppler velocity accuracy applicable to this application, and results are compared with conventional approximation method. Validity and limitation of the approximation method are indicated from comparison with numerical method. It is shown that requirements to radar sensitivity and Doppler measurements will be satisfied. However, because these requirements to CPR are very tough, further detailed study on both design optimization and assessment technique development are necessary. Under radar operation with very high pulse repetition frequency (PRF) required in this CPR, surface clutter interference caused through antenna sidelobes is an important issue. Analysis on this issue and preliminary requirements to the antenna sidelobes are also discussed.