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目前我国卫星云图的接收、显示都是在各个地面接收站上进行的。这类接收站配备有从天线、接收机到传真机的成套地面接收设备。本文介绍利用电话线传输接收机收到的地球同步气象卫星的低分辨率图象信号,使其在一定距离之外,多点同时不失真地显示和记录云图资料的基本原理和实施方法。利用电话线传输低分辨率云图时,地面接收站上只要给接收机加一个补偿放大器,各用户只需一台118传真机作为终端设备即可。
At present, the reception and display of China’s satellite cloud images are carried out on all ground receiving stations. This type of receiving station is equipped with a complete set of ground receiving equipment from the antenna, receiver to fax machine. This paper introduces the basic principle and implementation of using the telephone line to transmit the low-resolution image signal of the geosynchronous meteorological satellite received by the receiver to display and record the cloud data beyond the certain distance and without any distortion at the same time. When using a telephone line to transmit low-resolution clouds, the receiving station on the ground simply adds a compensation amplifier to the receiver, and each user only needs one 118 fax machine for the terminal equipment.