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| 1 | Influence of(FeO+Ti O_2) abundance on the microwave thermal emissions of lunar regolith显示文摘One of the essential controls on the microwave thermal emissions(MTE) of the lunar regolith is the abundance of Fe O and TiO_2, known as the(Fe O+Ti O_2) abundance(FTA). In this paper, a radiative transfer simulation is employed first to study the change in the brightness temperature(T_B) with FTA under a range of frequencies and surface temperatures. Then, we analyze the influence of FTA on the MTE of the lunar regolith using microwave sounder(CELMS) data from the Chang'E-2 lunar orbiter, Clementine UV-VIS data, and lunar samples recovered from the Apollo and Surveyor projects. We conclude that:(1) FTA strongly influences the MTE of the lunar regolith, but it is not the decisive control, and(2) FTA decreases slightly with depth. This research plays an essential role in appropriately inverting CELMS data to obtain lunar regolith parameters. | MENG Zhi Guo YANG Guo Dong PING Jin Song CAI Zhan Chuan Alexander GUSEV Edward M.OSEI | 2016 | Science China Earth Sciences2016，59，7： | 4 |
| 2 | 基于小波变换的遥感纹理信息提取显示文摘遥感纹理信息是地物空间特征的综合反映,综合纹理信息是进行专题信息提取获取的重要依据。遥感数据具有复杂性、统计性和随机性,同时,遥感图像中地学信息,如地质构造、蚀变信息及岩性分界等高频信息具有一定的方向性;小波变换具有'变焦性'、对称性、正则性等特点,可以较为快速地检测到奇变信号。利用小波变换可以快速、有效地提取遥感纹理高频奇变信息。 | 邢立新 孟治国 M.Osei Edward | 2004 | 吉林大学学报(地球科学版)2004，34，3： | 3 |
| 3 | (FeO+TiO_2)含量对月壤微波热辐射的影响显示文摘(Fe O+Ti O_2)含量(FTA)是月壤微波热辐射(MTE)的重要影响因素之一.文章首先基于辐射传输方程,数值模拟研究了不同频率、不同月表温度条件下FTA对MTE的影响.然后,结合Clementine卫星UV-VIS数据及Apollo和Surveyor计划样品得到的FTA资料,基于嫦娥2号卫星微波辐射计(CELMS)数据,系统分析了FTA对月壤MTE的影响.结果表明:(1)FTA是同一纬度方向上MTE的重要影响因素,但不是月壤MTE的决定性因素;(2)FTA随月壤深度的增加而略有下降.研究结果对基于嫦娥系列卫星CELMS数据的月壤参数反演具有重要意义. | 孟治国 杨国东 平劲松 蔡占川 Alexander GUSEV Edward M.OSEI | 2016 | 中国科学:地球科学2016，46，5： | 1 |
| 4 | Land cover change detection in West Jilin using ETM + images显示文摘In order to assess the information content and accuracy ofLandsat ETM+ digital images in land cover change detection,change-detection techniques of image differencing,normalized difference vegetation index,principal components analysis and tasseled-cap transformation were applied to yield 13 images. These images were thresholded into change and no change areas. The thresholded images were then checked in terms of various accuracies. The experiment results show that kappa coefficients of the 13 images range from 48.05 ~78.09. Different images do detect different types of changes. Images associated with changes in the near-infrared-reflectance or greenness detects crop-type changes and changes between vegetative and non-vegetative features. A unique means of using only Landsat imagery without reference data for the assessment of change in arid land are presented. Images of 12th June, 2000 and 2nd June, 2002 are used to validate the means. Analyses of standard accuracy and spatial agreement are performed to compare the new images (hereafter called 'change images' ) representing the change between the two dates. Spatial agreement evaluates the conformity in the classified 'change pixels' and 'no-change pixels' at the same location on different change images and comprehensively examines the different techniques. This method would enable authorities to monitor land degradation efficiently and accurately. | Edward M.Osei Jr. | 2004 | Journal of Geoscientific Research in Northeast Asia2004，7，1： | 0 |
| 5 | Remote sensing needs and capabilities in West Africa显示文摘The greatest advantage of remote sensing over conventional measurements lies in the opportunity to carry out detailed spatio-temporal analysis of land and ocean features on a very frequent basis. This paper analyses the contribution of satellite imagery to atmospheric, geophysical and ocean studies and management in West Africa since the early 1980s.The detailed application of data from optical sensors (e.g. Meteosat,NOAA/AVHRR, SPOT,L andsat TM, etc.) for weather prediction, hydrogeological, landuse/cover and cartographic studies has been acknowledged. However, the use of microwave (e.g. SAR) and optical data for ocean monitoring and studies in the sub-region is still very limited. Even though sufficient remote sensing expertise and infrastructure is perceived in the region, no clearly defined networking or database exists. | Edward M.Osei Jr. | 2004 | Journal of Geoscientific Research in Northeast Asia2004，7，1： | 0 |
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