地理科学 ›› 1983, Vol. 3 ›› Issue (3): 277-280,282,283.doi: 10.13249/j.cnki.sgs.1983.03.277

• 研究报导 • 上一篇    下一篇

沼泽植物群落的低空系留气球多光谱摄影实验

王汝笠   

  1. 中国科学院长春光学精密机械研究所
  • 出版日期:1983-05-20 发布日期:1983-05-20

AN EXPERIMENT ON APPLICATION OF THE LOWALTITUDE TETHERED BALLOON MULTISPECTRAL PHOTOGRAPHY IN STUDY OF MARSH

Wang Ruli   

  1. Changchun Institute of Optics and Fine Mechanics, Academia Sinica
  • Online:1983-05-20 Published:1983-05-20

摘要: 近二十年来,卫星和飞机是遥感仪器的主要运载工具。但是,随着遥感技术的广泛应用,人们还迫切需要其它各种各样的遥感平台,以适应不同应用对象的要求。系留气球是一种可供试验和实用的遥感平台。

Abstract: In September,1980,an experiment on application of singlelens multispectral photography wa carried out successfuly on the grassy marshland at Jinyuetan area in Changehun and the marshland at Huangnihe in Dunhua County in Jilin Province. The writer used the self-designed and-fabricated low-altitude tethered balloon as a platform of remote sensing for multispectral photography. The height taken for multispectral photography was from 10 to 100 meters. Because of the aerial influence and the limitation imposed by the ground resolution, the photographs taken by satellite and aircraft can be applied only to provide partial material for marsh researching. But the low-altitude tethered balloon multispectral photographs Can supply some additional new information. This information is of benefit to the quantitative analysis for the Classification and distribution of the marsh vegetation, the type of the marsh and its boundaries, etc. (1) By detecting and Comparing spectral densities in four Channels (400nm—800nm), three different kinds of marsh vegetation can be distinguished. Typha Orientalis Can be recognized more easily in IR Channel than in the other Channels. (2) The old buggy routes in the marshland Can bedetermined by colour compositional images.The application of these images Can also make correct sketch of the marsh classification and Calculate the area of the dispersed marsh vegetation. (3) It is a new means of applying digitized image processing to take quantitative measurement of the Colour Compositional image. According to the, colour-minus △E. it has been proved that the IR-G-R image is better than the IR-R-G image in recognizing various marsh vegetation. As a result of this experiment, the low-altitude tethered balloon is proved to be an economic and effective platform for multispectral photoghaphy. It is an easy and Convenient method to collect data of remote sensing. But it has a shortcoming that the tethered balloon moves along with the wind.So the writer suggests to develop a motor-balloon.