Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 41401417 |
| 基于青藏高原永久冰川的卫星传感器在轨辐射响应衰变跟踪研究 | |
| 王玲 | |
| 主持机构 | 国家卫星气象中心 |
| 开始日期 | 2015 |
| 结束日期 | 2017 |
| 资助经费 | 250000(CNY) |
| 项目类别 | 青年科学基金项目 |
| 资助机构 | CN-NSFC（国家自然科学基金） |
| 语种 | 中文 |
| 国家 | 中国 |
| 英文简介 | To monitor changes in sensor performance and sensor calibration is a critical step to ensure data quality and to meet the needs of quantitative remote sensing in a broad range of scientific applications. One of the least expensive and increasingly popular methods of on-orbit calibration has been the use of pseudo invariant calibration sites (PICS). In this study, we analyze for the first time the potential of Glaciers on the Tibetan Plateau as PICS using the land and atmosphere products from ASTER, MODIS and OMI. A spatial homogeneity and temporal stability sub-region with high reflectance within Glaciers on the Tibetan Plateau is firstly identified through above analysis. Then, FY-3A/MERSI is used as the demonstration satellite, and the radiometric degradation model of MERSI is established by using time series analysis techniques to the sequences of normalized top-of-atmosphere (TOA) reflectance by Bi-directional Reflectance Distribution Function (BRDF) model of the snow surface. Compared to the polar ice-sheet, Tibetan Plateau glaciers located at lower latitudes have the advantage of providing continuous observations for monitoring the performance of satellite instruments, thus the seasonal oscillation patterns of satellite instrument degradation can be better understood. Compared with the desert site, Tibetan Plateau glaciers have the advantage of lower atmospheric disturbances and higher response. Through this study, the number of PICS in China can be enriched, which is helpful to promote the in-flight vicarious calibration of China's own satellite towards the direction of high precision, high quality, and high frequency. |
| 来源机构 | 国家卫星气象中心 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/346847 |
| 推荐引用方式 GB/T 7714 | 王玲.基于青藏高原永久冰川的卫星传感器在轨辐射响应衰变跟踪研究.2015. |
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