中国空间科学技术

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风云二号卫星 CDAS 原始云图解调器

许兴   

  1. 西安空间无线电技术研究所
  • 发布日期:1998-06-25

METEOROLOGICAL SATELLITE CDAS RAW IMAGE DEMODULATOR

Xu Xing(Xi'an Institute of Space Radio Technology,Xi'an 710000)   

  • Published:1998-06-25

摘要： 在传统四次方环基础上提出了一种适用于快捕的新方法——四次方环开关法；根据这一原理研制的风云二号ＣＤＡＳ原始云图解调器具有捕获快，捕捉带宽，误码率性能好等特点；经测试及实用证明，此解调器性能优良，完全能满足实际需要。

关键词: 卫星云图, 信号截获

Abstract: This paper presents a new methodfourth law loop switching method,which is based upon the traditional fourth law loop and is suitable for fast acquisition.According to this principle,we develop a FY2 meteorological satellite CDAS raw image demodulator which has the properties of easy designing and adjusting,fast acpuisition,wide capture range and good bit error rate performance.Both testing and actual use prove that this demodulator achieves good specifications and can fully satisfy the actual demands.