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  • 软件名称:基于FY-4A数据的青藏高原多时相云检测方法
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 张永宏,杨晨阳,陶润喆,王剑庚,田伟
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 基于我国新一代静止气象卫星FY-4A/AGRI的4 km分辨率全圆盘数据,利用其高时间分辨率、高光谱分辨率的特点,提出一种青藏高原地区多时相多通道阈值组合的云检测方法,并通过实际案例分析所提出的云检测方法有效可行。结果表明:对比中国国家气象中心云检测产品以及传统单时相云检测方法,多时相云检测方法,其准确率为94.4%,误检率为7.2%,漏检率为5.6%,均优于其他两种方法,体现了多时相检测的优越性;云相态检测中,分别使用GPM降水资料以及CALIPSO卫星云相态观测结果对检测结果进行精度评价,其中冰云分布与GPM实测降水分布相似度达到了0.883,云相态整体检测结果与CALIPSO实际观测的云相态也较吻合,进一步验证了云相态检测的合理性,这也是对青藏高原地区进行降水监测的一种辅助手段。 关键词: 青藏高原地区;  云检测;  FY?4A;  多时相;  GPM;  CALIPSO     Abstract: Based on the 4 km resolution full-disc data of China's new generation of geostationary meteorological satellite FY-4A/AGRI, using its high temporal resolution and high spectral resolution, a multi-temporal multi-channel threshold combination cloud detection in the Qinghai-Tibet Plateau is proposed. Compared with the China National Meteorological Center cloud detection products and the traditional single-phase cloud detection method, the multi-time phase cloud detection method has an accuracy rate of 94.4%, a false detection rate of 7.2%, and a missed detection rate of 5.6%; In the cloud phase detection, the GPM precipitation and the CALIPSO satellite cloud phase observation were used to evaluate the accuracy of the detection results. The similarity between cloud phase detection result and GPM data reaches 0.883. The result of the cloud phase and the actual CALIPSO observation is also close. The rationality of cloud phase detection is verified, and it is also an auxiliary means for precipitation monitoring in the Qinghai-Tibet Plateau.

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