Aquarius Official Release Level 3 Sea Surface Spiciness Standard Mapped Image 7-Day Running Mean Data V5.0

Aquarius Level 3 sea surface spiciness standard mapped image data contains gridded 1 degree spatial resolution spice data averaged
over daily, 7 day, monthly, and seasonal time scales. This particular data set is the 7-Day running mean sea surface spiciness product for version 5.0 of the Aquarius data set. The Aquarius instrument is onboard the AQUARIUS/SAC-D satellite, a collaborative effort between NASA and the Argentinian Space Agency Comision Nacional de Actividades Espaciales (CONAE). The instrument consists of three radiometers in push broom alignment at incidence angles of 29, 38, and 46 degrees incidence angles relative to the shadow side of the orbit. Footprints for the beams are: 76 km (along-track) x 94 km (cross-track), 84 km x 120 km and 96km x 156 km, yielding a total cross-track swath of 370 km. The radiometers measure brightness temperature at 1.413 GHz in their respective horizontal and vertical polarizations (TH and TV). A scatterometer operating at 1.26 GHz measures ocean backscatter in each footprint that is used for surface roughness corrections in the estimation of salinity. The scatterometer has an approximate 390km swath.

水瓶座（Aquarius）三级标准海表盐度距平（sea surface spiciness）制图图像数据集，包含空间分辨率为1度的网格化海表盐度距平数据，其时间平均周期涵盖日、7日、月及季节四个尺度。本数据集为水瓶座数据集5.0版本的7日滑动平均海表盐度距平产品。水瓶座仪器搭载于AQUARIUS/SAC-D卫星之上，该卫星是美国国家航空航天局（NASA）与阿根廷国家空间活动委员会（Comisión Nacional de Actividades Espaciales，CONAE）的合作项目。该仪器包含三台按推扫式布局的辐射计，其相对于轨道阴影面的入射角分别为29°、38°与46°。各波束的观测足迹分别为76千米（沿轨向）×94千米（交轨向）、84千米×120千米以及96千米×156千米，总交轨向幅宽可达370千米。这些辐射计可在1.413 GHz频段下，分别以水平极化与垂直极化模式测量亮温（TH与TV分别对应水平极化亮温、垂直极化亮温）。另有一台工作于1.26 GHz频段的散射计，可对每个观测足迹内的海洋后向散射信号进行测量，该数据用于盐度估算过程中的海面粗糙度校正。该散射计的幅宽约为390千米。