论文部分内容阅读
工作于光谱微波段的传感器,能够提供反射波段和红外波段以外地物的丰富遥感信息。早在六十年代末至七十年代中期,机载侧视雷达(SLAR)图象在地球资源遥感中的应用就已取得了一些成果。尤其是在中南美洲地区成功地取得的雷达图象,证明了微波遥感不受天气条件影响这一突出优点,因而受到普遍重视。利用航天遥感平台取得雷达图象始于1978年的海洋卫星-A所载合成孔径雷达(SAR)。而首次取得目的在于陆地资源和环境研究的航天雷达图象的,则是1981年11月“哥伦比亚号”航天飞机所载航天飞机成象雷达(SIR-A)。SIR-A入射角的设计不同于海洋卫星SAR,其图象更适合于陆地研究。两年来的研究证明,航天微波遥感对陆地资源和环境研究有着巨大的潜力。撒哈拉沙漠大型古河道的发现等就是成功的例子。
Sensors operating in the spectral microwave range provide a wealth of remote sensing information for reflections outside the infrared and infrared bands. As early as the late 1960s and the mid 1970s, some achievements have been made in the application of airborne side-looking radar (SLAR) images in the remote sensing of the Earth’s resources. In particular, the successful acquisition of radar images in Central and South America has proved that microwave remote sensing is not affected by the weather and this outstanding merit has gained universal attention. Radar image acquisition using a space-based remote sensing platform began in 1978 with synthetic aperture radar (SAR) from Ocean Satellite-A. The first spaceborne radar and radar imagery aimed at land resources and environmental research was the Space Shuttle Imaging Radar (SIR-A) contained in the “Columbia” space shuttle in November 1981. The design of the SIR-A angle of incidence is different from that of ocean satellite SAR and its image is more suitable for land studies. Two years of research have shown that space microwave remote sensing has great potential for the study of terrestrial resources and the environment. The discovery of large ancient sahara rivers is an example of success.