资源卫星用的高密度数字记录器

资源卫星所用的高密度数字记录器（ＨＤＤＲ）是为资源卫星专门研制的一种新型记录器。该记录器可记录５０Ｍｂ／ｓ的ＮＲＺ－Ｌ信号，记录时间为１５ｍｉｎ，总容量达４．８×１０１０ｂｉｔｓ。本文对该记录器的信道作了系统的介绍。对于作为通用接口的指令、系统、工作原理、电路结构、ＰＲＯＰ码的帧结构、纠错系统、接口指令、运带机构及其设计应考虑的几个因素等作了介绍，最后，给出其指标。结论认为，误差指标远优于用户要求，功耗也比国外同类产品的低，性能优良。

A High Data Rate Magnetic Tape Recorder of the ERS

The high density data recorder (HDDR) of the ERS has been developed under the contract with the CAST.The HDDR is capable of recording and reproducing at the rate of 50 Mb/s.The total continuous record time is 15 minutes.thus a total of 49 Gbits can destored.Through the use of a efficient simple error free system,the error rate has been lowered to 10 -10 that is much less than same type magnetic recorder in the world. This paper presents the functions,characteristics and some principles of the HDDR.