最新刊期
卷 ， 期 4 ， 1988
- 摘要：In this article, the space remote sensing projects in the next decade, including the LANDSAT-6,7, SIR-C/X-SAR Space Shuttle mission, NASA manned Station and Space Platform in the U.S.A., the RADARSAT of Canada, ERS, AERS and Space Platform of the ESA, SPOT series in Franch, MOS series and JERS satellite in Japan, and IRS and SROSS-ii satellites in the India are introduced systematically. The purposes, sensors on board and the orbit parameters of these projects are described. The technical features of these projects are compared and the main application research fields in future space remote sensing are discussed.
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发布时间：2021-06-10 - 摘要：The ocean and its coastal areas are vital regions for economic development and consequently many satellite missions are under preparation for sensing in the different parts of the EMS. Ocean color and sea surface temperature are parameters for which advanced techniques are ready for operational monitoring. Sensors working at microwave frequencies may soon be operational.
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发布时间：2021-06-10 - 摘要：In this paper evolution of ancient lake in Taiyuan basin and changes of ecological environment were studied by optical enhancement of remote sensing image, geoscience analysis and historical records. Using 11 combinations we extracted information by means of the ratio method between MSS + 5 and MSS -7 gathered by landsat in Dec. 11, 1973, May 9, 1977 and Oct. 23, 1979. Information about the contour of the ancient lake bank during different historical period was obtained, its acreage was measured by optical electronic scanner and analysed quantitatively. By analysing historical records we identified the date of the ancient lake, the influence of forest destruction on environment and shrinkage or extinction of the lake.
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发布时间：2021-06-10 - 摘要：This article deals with an attempt at indoor visual interpretation of the metric camera images of Rikaze area, Tibet plateau. It briefly introduces the basic parameters of the metric camera in European spacelab carried by the spacecraft during its ninth flight （STS-9/Spacelab） from Nov. 28th, 1983. The supplementary maps were mapped using MC images of geological visual interpretation （such as drainage system, lineament and circular features）. The inter-pretated results of typical lithological chracters and structure were compared with Lansat MSS data. The conclusions are: （1） with MC images, the objects on ground are clear, （2） the bare area of bedrocks supplies abundant geological information, （3） the different rock unit can be easily distiguished （such as granite, basicultrabasic rocks, normal sedimentary rocks and volcanic rocks etc.）, and （4） some stratigraphic key horizons, the differentiation of strikes can be recognized, （5） most information of occurance can be identified and the fold structure can be inter-pretated qualitatively. The results of the inperpretation are very good, the dimensions, directions, combinations of the fault are reflected, and some blind faults can also be interpreted. The effects of interpretation of MC imagas excells that of the MSS images and can meet the needs of mapping standards at middle scale.
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发布时间：2021-06-10 - 摘要：In digital image mosaicking, search of seam points is the key procedure. It is usually to be done based on certain criteria to select the seam points row by row. In one-dimensional seam point search algorithm, the horizontal artificial edges are more significant than the vertical. In this article, a two-dimensional seam point searching algorithm is suggested where the grey level differences in the vertical direction are concerned as well as in the horizontal direction. Algorithm for mosaics of multispectral images is also introduced. Experiments show that with the method proposed, the artificial edges in the mosaics can be smoothed effectively.
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发布时间：2021-06-10 - 摘要：With the crop estimation for winter wheat in Tianjin City area as a model, this paper elucidates the Application feasibility of NOAA/AVHRR information to predict the crop in small and medium sized area. In data analysis, spectroscopic values obtained from water surface are used to correct atmospheric factors, and the geographic contour map is used to eliminate confused factors, thus the data tend to be stabilized. By utilizing the vegetation index and yield factor, some regression equations for forecast are suggested with the green values corrected according to different area and integrated temperature. Then, an accuracy of 95% for forecast may be obtained.
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发布时间：2021-06-10 - 摘要：A method is presented which offers a biological base to empirical methods of estimating crop yield from remotely sensed canopy reflectance. This method involves two basic espects, （i） A pattern of leaf area index （LAI）, which follows a characteristic trajectory, is provided based on six sets of LAI from plant initiation to maturity from Boerema in Riverna, New South Welse, Australia. There are three varities each for the both of combine sowing and aerial sowing, （ii） A form of daily rate of intercepted photosynthetically active radiation （PAR）, IPARd, as a function of LAI is derived with a simulating calculation based on the radiation transfer equation in a canopy and the measured data of foliage inclination in the field and the conventional data of radiation. The simulated IPARd is tested with the measured points in the field in January. They are fitted very well. If a single value, LAl0, of LAI at the stage closely prior to anthesis is obtained, the values of LAI from then to maturity can be estimated based on the pattern of LAI. The accumulated intercepted PAR, TIRAR, from anthesis to maturity can then be estimated based on the function of IPARd. and estimated sequential LAI over this period. Then rice yield can be estimated from the TIPAR, assuming that all assimilates during this phase are directed towards seed-fillings.The method is used for estimating rice yields on farms. The values of LAlo are derived from the canopy reflectance on images of Landsat -5 on January 21, 1985.
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发布时间：2021-06-10
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