卫星传输文献系统述评

Review of Satellite Transmission Document system

20世纪80年代可称其为信息时代。世界范围内出版和传播的知识剧增,致使图书馆的馆藏出现暴涨。同时,随着电讯设备、电子存取和计算机检索系统的发展,大大地提高了查找文献的速度和广度。图书馆用户不一定非从本地图书馆获得文献不可,因为同时也可以从外地情报源经常不断地获得文献。其结果,势必强调馆际互借,强调文献提供能力,强调为此而作出的一切努力。现在,通过联机情报检索系统可在几分钟内找出书目参考资料。

The full text falls into three parts:1.document transmission speed;2.On-line order for docu-ments;3.Document transmission methods.Among those three,Part 3 stands as the focal point whichgoes into details of problems of facsimile and satellite document transmission.Making digital informa-tion convenient for direct and high-speed transmission,the satellite shows its advantages as follows:high capacity,low bit error rate,distance independent costs.It is particularly suitable for outlying dis-tricts and mountain areas sparsely populated.