circumterrestrial satellite
极地轨道环境卫星 POES
极地运行环境卫星 Polar Operational Environmental Satellite
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。
It USES a high precision digital phase-locked loop (PLL) to accurately recover the Synchronous reference information of raw cloud-cover image data collected by the geostationary satellite.
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