最新刊期
卷 ， 期 2 ， 1989
- 摘要：This feasibility study was conducted for extention of the multiple-wavelength method used for satellite measurement of sea surface temperature from thermal infrared data to land surface tempera tures through atmospheric radiative transfer simulations. The range of atmospheric conditions and surface temperatures simulated is wide enough to cover variations in clear atmospheric properties and surface temperatures, both of which are larger over land than over sea. Surface elevation is also included in the simulation as the most important topographic effect. Land covers characterized by measured Or modeled spectral emissivities include snow, clay, sands, and tree leaf sampks. The statistical inverse model Can estimate the surface temperature with a standard deviation less than 0.3 K and a maximum error less than1 K, for viewing angles up to 40° from nadir under cloud-free conditions, given satellite measurements in three infrared channels. Bands from the NOAA AVHRR （Advanced Very High Resolution Radiometer） may be used, as can selected bands from one of two sensors under consideration by EOSAT and NASA for a future remote sensing instruments, either the addition of multispectral thermal infrared channels to Landsat or a sensor with a wide field-of-view designed for measurements over land or sea （SeaWiFS）.关键词：land surface temperature;satellite thermal infrared data;NOAA AVHRR;atmospheric radiative transfer simulation
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发布时间：2021-06-10 - 摘要：SPOT Combined images can be made by multispectral and panchromatic ones in three different ways. Among them, the image D with conversion of color space coordinate systems and edge enhancement appears the best effect for land use survey in Tangshan urba narea. As shown in Fig. 2, 5 level-Ⅱ and 17 level-Ⅲ classes can be recorgnized from the image D at the scale of 1: 29600. The interpretation accuracy of the land use map is about 90%. In addition, a classification system and a set of interpretation keys for land use survey are described in this paper.
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发布时间：2021-06-10 - 摘要：This research is based on the standard false colour composite images of French SPOT satellite obtained on 30th, May, 1987 as main infcrmation resource to study forest fire damages of the forest land in Amuer Forest Bureau of Great Xingan Mountains.The article is emphasis on principles, methods and errors of area measurement. The comparison is made between the results of district forest surrey （a kind of field surrey） and the method of calculated timber stock volume damage using moderate ground sample plots enumeration and visual measurement assisted by an angle gauge as well as with statistical sampling techniques; particularly, the comparison of consistency among the image interpretation of forest fire damage classes, the ground landscape and the percentages of burn-out timber stock （quantitative description of forest fire damages）.The results show that the application of SPOT satellite data to estimate forest fire damage using the above introduced research method can quicply and economically obtain the necessary results and meet the requested precision.关键词：remote sensing;forest survey;stock volume estimation;forest fire
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发布时间：2021-06-10 - 摘要：This paper tells some experimental results of remote sensing estimation of winter wheat yield under the condition of controlable sample fields. The controlable sample field means that winter wheat was grown on a cement pool with 3.25 meters long, 2.37 meters wide and 2.00 meters in depth to enlarge the span of yield by controling fertilizer and watering. During the growing season necessary agronomic parameters, such as LAI, the ear number, average grain number and the grain weight, etc., were measured, at the same time we measured spectral parameters. Based on finding the relationship between spectral parameters of different stages and three basic factors which form winter wheat yield an integral formular for remote sensing winter wheat yield estimation was found. An analysis and discusion was made for the principal of remote sensing estimation of winter wheat yield.
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发布时间：2021-06-10 - 摘要：The author analyses the distributive characteristics of the diffusive region and the seasonal change of Surface concentration of suspended sediment in Hangzhou Bay, using NOAA-AVHRR images in 1984, and further appraises the influence of environment over the sea waters, using suspended sediment as tracing.
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发布时间：2021-06-10 - 摘要：In hydrological, oceanographic, environmental and ecological investigations, there is usually a great demand for a new technique to remotely detect chlorophyll concentration （CC） in different water depths. However, the conventional optical methods and optical remote sensing techniques can not meet the demand. This paper describes a new technique which can remotely detect CC in different water depths and a suspended solids concentration determination （SSCD） device specially designed for this purpose. The water samples from different depths of water can be pumped into the SSCD device, then their CC were remotely detected by a portable spectroradiometer. It only took about four minutes to finish one CC remote detection. The new technique is dozens of times more efficient than the traditional spectropho-tometric, fluorometric and chromatographic methods. The results of in-situ CC remote detection of 29 fishponds showed that the average relative error of the new method was only 3.8%. Since the new technique has great advantages such as low cost, high efficiency and no need of sample collection and sample pretreatment, to which all the conventional methods are im-. comparable, it is well worth extending it into hydrological, oceanographic and environmental investigations.
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发布时间：2021-06-10 - 摘要：The paper interprets the rock type and then proceed to interpret the strata on the basis of rock formation by means of analysing the airborne spectrum which is produced by airborne multispectral scanning data and ground spectrum and by using the digitally processed airborne multispectral scanning image.
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发布时间：2021-06-10 - 摘要：Landsat Thematic Mapper （TM） image is rich in spectral information, while SPOT panchromatic data is fine in its spatial resolution. Complementary and effective use of these data has shown in its increasing importance in the field of remote sensing application.In this paper, methods of digital merging of SPOT and TM data are investigated. Resultant of enhancement both in spectral and in spatial resolution is illustrated by an example.
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发布时间：2021-06-10 - 摘要：<正> 由中国科学院遥感应用研究所主持编著的《黄淮海平原水域动态演变遥感分析》一书,已由科学出版社出版。该书及时抓住了遥感技术发展的特点和现状,立足于遥感应用研究的前沿领域,把遥感应用从静态分析推进到了动态研究。此项工作以黄淮海水域动态演变为研究内容,其地区之大,超过了我国以往遥感研究的范围。加之研究方法上的综合性和研究时段上的长足性,使该研究无论在学术上还是实用上,均做出了诸多贡献。
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发布时间：2021-06-10
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