Application of Airborne Remote Sensing Data Transmission System in Earth Environment Monitoring
Shi Zehua, Zhang Zhaming, Sun Maohua
The Research Center for Space Science
and Application, Academia Sinica
Beijing P.R. China
Abstract
There are many different data types in airborne remote sensing because what kind of sensor can be used depends on the environment, so a digital communication system must can be varied to suit these different data. This paper mainly introduces a down - link and monitoring system. The data rate of the down-link ranges from 1. 2 kbps to 6Mbps, so the down-link can meet the requirements of all our sensors now, and we can get the high quality images of the target on the monitor in headquarter on earth, the data may also be sent to a computer to be processed.
This system may be used in monitoring floods by SAR, monitoring forest fires by MSS and monitoring the windstorms in desert by CCD scanner, etc.
This system was successfully used in monitoring the Chinese vast flood in 1991, in the paper we will give some flood photographs taken from the monitor screen that time.
In China, there are many disasters that may cause vast losses every year, such as floods, forest fires and earthquakes , etc. Floods is the main source of the losses. In 1991, a vast flood took place in about one half the aera of China Yangtze-king River, Songhua River, Dongting Lake, Taihu Lake,, etc. are all in the range where are the main economic and industrial center in disaster monitoring system. We designed and realized this system . The system has many sets in series, the first one is a analo FM system, the second one is a digital QPSK system, the frequency of the system may be 800MHz, 1500MHz and 2000MHz, now we are using C and K band.
This paper mainly discusses the digital system.
