Aqua/AMSR-E L2 Sea Surface Temperature

Aqua/AMSR-E L2 Sea Surface Temperature dataset is obtained from the AMSR-E sensor onboard Aqua and produced by the Japan Aerospace Exploration Agency (JAXA). Aqua of NASA was launched on May 4th, 2002 in Sun-synchronous sub-recurrent Orbit. Aqua observes various kinds of physical phenomena related to water and energy circulation from space. Aqua data promoted the research activities for interactions between the atmosphere, oceans and lands, and their effects on climate changes. AMSR-E scans the Earth's surface by mechanically rotating the antenna and acquires radiance data of the Earth's surface. Each frequency band is monitored by vertical and horizontal polarized wave. It conically scans and keeps an angle of incidence on the earth surface (a nominal of 55 degrees) and accomplishes a swath width of about 1450 km. The AMSR-E reached its limit to maintain the antenna rotation speed necessary for regular observations, and the AMSR-E restarted its observation in slow rotation mode (2 rotations per minute) on December 4, 2012. However, the AMSR-E reached its limit to maintain the antenna rotation speed necessary for slow rotation mode and it automatically halted its observation and rotation on December 4, 2015. Level 2 product stores the Geophysical quantity from the brightness temperature of level 1 product. This product includes Sea Surface Temperature (SST). The relationship between 6V (or 10V) and SST is calculated by using the complex relative dielectric constant. The physical quantity unit is degree. Also, the quality flag for each observation point (Pixel Data Quality) is stored. The provided format is HDF4. Spatial resolution is 10 km. The current version of the product is "Version 7". The generation unit is scene (defined as a half orbit).

Aqua/AMSR-E L2海表面温度数据集由搭载于Aqua卫星的AMSR-E传感器获取，由日本宇宙航空研究开发机构（Japan Aerospace Exploration Agency，JAXA）制作。美国国家航空航天局（National Aeronautics and Space Administration，NASA）的Aqua卫星于2002年5月4日发射升空，运行于太阳同步亚回归轨道。Aqua卫星从太空观测与水和能量循环相关的各类物理现象，其数据推动了大气、海洋与陆地间相互作用及其对气候变化影响的相关研究。AMSR-E通过机械旋转天线扫描地球表面，获取地球表面的辐射亮度数据。每个频段均采用垂直极化与水平极化方式进行监测。该传感器采用圆锥扫描模式，与地球表面的入射角固定为标称55度，幅宽约1450千米。AMSR-E曾因无法维持常规观测所需的天线转速而中断观测，后于2012年12月4日以慢转速模式（每分钟2转）重启观测。但后续又无法维持该慢转速模式所需的天线转速，最终于2015年12月4日自动停止观测与天线旋转。L2级产品存储由L1级产品的亮度温度反演得到的地球物理量，本产品包含海表面温度（Sea Surface Temperature，SST）。通过复相对介电常数计算6V（或10V）频段与海表面温度之间的关联关系，物理量单位为摄氏度。同时还存储了每个观测点的质量标记（像素数据质量，Pixel Data Quality）。该数据集采用HDF4格式存储，空间分辨率为10千米，当前产品版本为"Version 7"，数据生成单元为一个观测场景（定义为半轨道周期）。