排序方式： 共有4条查询结果，搜索用时 31 毫秒
1
1.
水体叶绿素a含量和蓝藻密度是评价水质污染的主要参数,对监测水体蓝藻水华有重要意义。该文利用2008年11月10日和11日太湖水面实测光谱及FY-3A/MERSI,AQUA/MODIS卫星的波段响应函数,计算了卫星波段的水体表面等效反射率。水体实测光谱显示蓝藻污染提高了近红外波段的遥感反射率,在蓝光波段和绿光波段有明显的吸收谷和反射峰。根据这一原理,该文建立了近红外和红光波段的比值指数RI模型,成功反演了太湖水体叶绿素a含量(均方根误差分别为0.0174 mg·L~(-1)和0.0188 mg·L~(-1))和蓝藻密度(均方根误差分别为247.21×10~6L~(-1)和275.64×10~6L~(-1))。这一结果为分析太湖水面光学特性、水质污染状况提供了重要依据。 相似文献
2.
Aerosol particles over land mainly come from man- made source such as biomass burning, industrial de-bris and natural source such as soil dust, sea salt parti-cles, etc. More and more research results show that, aerosols impact global and regional energy radiative budget; aerosol particles also modify the cloud mi-crophysics, as a result, aerosol particles may change the cloud radiative properties. Aerosol particles also play an important role in many biogeochemical cycles. All the above-menti… 相似文献
3.
Akira Shibata 《Journal of Oceanography》2007,63(5):863-872
The effect of air-sea temperature differences on the ocean microwave brightness temperature (Tb) was investigated using the
Advanced Microwave Scanning Radiometer (AMSR) aboard the Advanced Earth Observing Satellite-II (ADEOS-II) during a period
of seven months. AMSR Tb in the global ocean was combined with wind data supplied by the scatterometer SeaWinds aboard ADEOS-II
and air temperature given by a weather forecast model. Tb was negatively correlated with air-sea temperature difference, its
ratio lying around −0.4K/°C at the SeaWinds wind speed of 14 m/s for the 6 GHz vertical polarization. Tb of AMSR-E aboard
AQUA during 3.5 years was combined with ocean buoy data, and similar results were obtained. 相似文献
4.
利用TERRA和AQUA共同反演陆地上空的气溶胶光学厚度 总被引：1，自引：0，他引：1
利用TERRA和AQUA共同反演气溶胶光学厚度和地表反射率特征，对其原理及方法进行了详细的讨论。通过Terra和Aqua两颗卫星对同一地点的不同角度的观测，结合多个光学通道的信息，反演了北京地区光学厚度及地表反射率信息。反演的气溶胶光学厚度同地面观测的结果相比具有很好的一致性。同时，对地表反射率及气溶胶波长指数等也进行了讨论和对比，结果显示，对北京地区，MODIS1通道地表反射率和7通道地表反射率的比在0．66左右，3通道和7通道的比在0．28左右。相比于NASA暗背景全球反演算法中1、3通道和7通道的比为0．50和0．25的处理方法，反演得到的气溶胶光学厚度结果也较好。 相似文献
1