To separate mixed pixel temperature using differential coefficient of pixel mixed temperature to vegetation fractional cover
文献类型：会议论文
| 作者 | Jing Tian |
| 出版日期 | 2005 |
| 关键词 | separation mixed pixel surface temperature Pixel Component Arranging and Component Algorithm (PCACA)* regional-distribution soil |
| 页码 | 3262-3265 |
| 英文摘要 | This Two-layer surface fluxes model is suitable to inhomogenous soil-vegetation surface. The key step is to separate mixed pixel surface temperature. ATSR's sensor can provide two view angles for separating the temperature. However, the areas are different between the pixel at nadir view and the pixel at forward view, which would result in some errors. Furthermore, re-sampling will reduce the spatial resolution of remote sensing data. On the other hand, remote sensing data source used widely now do not provide multi-angular data, which also limits the wide use of this method. An alternative method for separating mixed pixel temperature is proposed in this paper. A different T-m2 similar to f(2) equation is established using the derivative of pixel mixed temperature to vegetation fractional cover (dT(m)/df). Combining with original T-m1 similar to f(1) equation the mixed pixel temperature can he separated. A pixel component arranging comparing method will be used to obtain (dTm/df). The essence of the method is to obtain (dTm/df) using slopes of a trapezium. The principle of this method is similar to the multi-angular method. And the method overcomes the uncertainty due to the different area measured in two view angles. Theoretical positioning algorithm of four extreme pixel temperatures in the trapezium is presented to overcome uncertainty of previous method. We did a series of experimentsin Beijing and Yucheng remote sensing experimental stations, and the results indicated that this algorithm is suitable for the purpose. The above methods were adopted to separate mixed pixel temperature in two-layer surface flux model using MODIS data and simultaneous measurements in Dongping Lake, Shandong province of China. Distribution images of soil evaporation and vegetation transpiration were obtained in North China. The method and algorithm are feasible and reasonable according to good agreements' between predicted and measured values. |
| 收录类别 | CPCI |
| 会议录出版者 | Ieee |
| 语种 | 英语 |
| ISBN号 | 0-7803-9050-4 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/25390]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Jing Tian. To separate mixed pixel temperature using differential coefficient of pixel mixed temperature to vegetation fractional cover[C]. 见:. |
入库方式： OAI收割
来源：地理科学与资源研究所
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