最新刊期
卷 ， 期 2 ， 1991
- 摘要：This paper describes the information characteristics of FY-1 meteorogolical satellite, its application in the fields of meteorology, climatology, natural environment and disaster monitoring. The FY-1 meteorological satellite data receiving and processing system are also briefly introduced.
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发布时间：2021-06-10 - 摘要：In this Paper, methods for monitoring soil moisture using remote sensing techniques, including backscattering coefficient using radar image, thermal inertia and crop water stress index using NOAA-AVHRR digital image, were disscussed and compared with conventional. mereorological methods, greenness indices and temperature difference. The results indicated that microwave remote sensing would be great prosperous for monitoring soil moisture, but its base must be researched. For the condition in China, the methods for monitoring soil moisture using NOAA-AVHRR digital image and meteorological station data to calculate thermal inertia, and evapotranspiration and crop water stress index, then estimate soil moisture were feasible.
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发布时间：2021-06-10 - 摘要：This paper discusses the multi-temporal approach which does research on seasonal change of vegetation and it’s classification by NOAA-AVHRR digital image. Image segmentation of various temporal vegetation index can display the movement of green front forward or backward during plant growth period. The vegetation-landscape map were acquired by image segmentation of the first principal component of Karhunen-Loe’ve transformation for image data of multi-temporal vegetation index. This result corresponds well with thoes of existing vegetation maps.
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发布时间：2021-06-10 - 摘要：The paper deals with the method of detection of forest change using Landsat MSS data of May, 1976 and October 1985 from frame of Pingchuan County, Hebei Province. The false color composites. （Band 7, 5, 4） were produced. The false color image is useful for manual interpretation of forest Change dynamics. A normalized difference vegetation index （NDVI） and a ratio vegetation index （RVI） were computed for two dates of Landsat data. The difference images for NDVI and RVI were produced by subtracting 1976 from 1985 data. the difference images indicate the great forest change between the above two data. Various standard deviation threshold levels were applied to the difference images to find the threshold value to produce the highest change classification accuracy. Principal components analysis of eight-channel data set consisting of the two landsat MSS data parity to generate the principal components. The first component is related to forest changes. The data classification techiques can monitor the changes of landcovers.
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发布时间：2021-06-10 - 摘要：In order to increase the afforestation in Yancheng, we have investigated the present situation of the afforestation in 1988 in the built-up area of Yancheng by the aerial method of remote sensing. In this investigation the black-and-white air photographs taken in March, 1986 were chosen. The procedure is: interpreting of black-and-white air photographs-afforestation mapping and calibrating of sample-interpreting of air photographs again-remeasuring of the area and comprehensively studying. As a result of this investigation, we have made a distributive and classificatory map （1: 4000） of the afforestation, remeasured the covered area of the afforestation, figured out the coeffcient of cover, and the ratio of the core kind of tree and evergreen/deciduous, and put forward some suggestions on raising this level of afforestation in yancheng.
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发布时间：2021-06-10 - 摘要：Fifteen samples have been continuously sampled in the E-W direction of the Yueyang experiment area （35 square kilometers）. These samples were collected from a wide range of different rock patterns such as river-lake sediment（Q）, fragmental rock（K）, sand slate（Pt） and granite. Analysis of optical power spectrum has been applied to obtain the power spectrum curve and power spectrum distribution curve, which is helpful for:1. obtain the strike of reflectance planes which will correspondingly have maximum values of back scatter. These planes are usually terrain slopes fact, outcrop surface, and structural fracture planes.2. The angle included between the direction of the maximum values can well reflect the angle made by the confluencing branchravine.3. calculate the drainage system density.4. analysis the general feature of topography in the sample area. The general feature of topography has close relationship with the characteristic of the lithologic association.We can determine the predominant direction and concentration density of lineament, and discriminate some types of rock in the studied area by spectrum analysis.
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发布时间：2021-06-10 - 摘要：The paper discusses the application of airborne and spaceborne remote sensing data which are optically and digitally processed to analyse the features of the mineralized geological units on imagery and its mechanism, and also to identify and determine the anomalous area of possibly mineralized geological bodies on imagery. It is discovered that one group of linerments interpreted from image existing in acid alkali-granites in arid area in the western China controls mineralization and contains mineral zones, especially on the airborne color infrared photograph they have excellent exposure. In the meanwhile, the greisen veins were interpreted from photograph, which are the good indications of tin deposit. In 1987, two tin deposit were discoverred during two months field investigation. In the surveying areas, it is found that in the densely intermittent linear image feature zone and in the altered rocks in NE 80?direction exists a outer contact zone between granites and Devonian system marine volcanic-sedimentary clastic rocks, which was regarded as the favourable place for activating and re-enriching gold element in gold-bearing strata by structural and magmatic movement. In August 1988, a gold deposit of structural fractured crevice altered rocks was found in the remote sensing field investigation. It is a valuable achievement of remote sensing technology. The avove examples show that remote sensing technology can rapidly undertake geological investigation and mineral exploration over large area and gain better economic results with very limited data in geologic working area difficult of conditions.
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发布时间：2021-06-10 - 摘要：In geography cartographic and remote sensing method are tending to integrate. In this article the author expounds common characteristics of cartographic and remote sensing method, analyzes the differences between them and their connection, explains two basic theoretical problems and technical base for their integration, enumerates main study tasks for their integration, and finally makes four suggestions.
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发布时间：2021-06-10 - 摘要：By means of research on correlation between spectral reflectance characteristics of soil and soil physico-chemical properties, and on the basis of law of soil distribution in China, a tentative programme on geographic regionalization of China land background was suggested. The programme was based on plant cover degree and spectral reflectance characteristics of soil. The whole counrty was divided into 6 regions and 23 su’bregions by the programme.
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发布时间：2021-06-10 - 摘要：Microwave brightness temperature of oil film on water surface is measured by 36GHz and 9.2 GHz microwave radiometers. Using the fluctuation dissipation theorem and Dyadic Green’s function for stratified medium, numerical calculation are carried out. The results agree with experimental data.
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发布时间：2021-06-10 - 摘要：On December 22, 1990, the famous pedo geographer, expert in micro-wave remote sensing and geographic information system, Graduate Dean of Department of Geography, University of California, Santa Barbara, Professor David Simonett departed from the world. He devoted his life to the development of geography in the United States, to the establishment of the National Center for Geographic Information and Analysis. Professor Simonett was a prolific writer, whose book, 《Manual of Remote Sensing》 （Vol. I） has promoted the development of remote sensing internationally. The establishment of the Earth Resources Company makes it possible to apply remote sensing and geographic information system to the exploitation of natural resources in the States with a remarkable benefit in economy.Professor Simonett was not only a world-famous educater, a scientist but also a good teacher and helpful friend to the Chinese scientific and technological field. He showed deep concern and gave ethusiastic guidance to those Chinese who were studying or doing research work in University of Califonia, Santa Barbara.. He had been invited to investigation and to academic lectures in China. He gave lots of cordial assistance to the Chinese people. In 1986, the Chinese Academia Sinica awarded him the title of Honorary Professor of Institute of Remote Sensing Application."Professor Simonett will always be remembered for his friendship and assistance to the Chinese people.
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发布时间：2021-06-10 - 摘要：<正> 由澳大利亚电脑公司研制的 GENASYS 是世界上著名的 GIS之一。因其系统结构独特和设计思想新颖,受到各国广泛重视,并在美国、澳大利亚及欧亚各国得到迅速推广。下面以运行在我所的 GENASYS为基础,介绍一下该系统的主要特征。
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发布时间：2021-06-10
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