论文部分内容阅读
同步定时器是ＣＤＡＳＳ／ＤＢ系统的重要部件。它用高精度数字锁相环，精确地恢复地球同步气象卫星采集的原始云图数据的同步基准信息。数字锁相环由用高速器件组成的相位比较器和用计算机软件实现的滤波器构成，采用标准频率计数方式，完成对模拟太阳（ＳＰ）和数字太阳（ＳＳＤ）的锁相及卫星上时钟频率测量等任务。
The synchronization timer is an important part of the CDASS / DB system. It uses high-precision digital phase-locked loop, accurate recovery of the geostationary meteorological satellite acquisition of the original cloud data synchronization reference information. The digital phase-locked loop is composed of a phase comparator composed of high-speed devices and a filter implemented by computer software, and adopts the standard frequency counting method to complete the phase locking of the simulated sun (SP) and digital sun (SSD) and the clock frequency on the satellite Measurement and other tasks.