The first quantitative ocean remote sensing by using Chinese interferometric imaging radar altimeter onboard TG-2
The first quantitative ocean remote sensing by using Chinese interferometric imaging radar altimeter onboard TG-2
复制标题
DOI：
10.1007/s13131-017-1010-6
复制
发表时间：
2017-01
影响因子：
1.4
通讯作者：
Jingsong Yang;L. Ren;G. Zheng
中科院分区：
文献类型：
--
作者：
Jingsong Yang;L. Ren;G. Zheng
天宫二号（TG-2，意为“天宫二号”）是中国的一个空间实验室，于2016年9月15日在酒泉卫星发射中心由长征二号F火箭发射。星载干涉成像雷达高度计（InIRA）是我国自行研制的新一代雷达高度计，也是第一台在轨宽测绘带成像雷达高度计，它集成了干涉测量、合成孔径和小入射角高度跟踪技术。在2016年9月22日的这次使命中，InIRA被打开以获取数据。利用国家海洋局第二海洋研究所卫星海洋环境动力学国家重点实验室（SOED）的第一批InIRA数据，对海洋风场和海浪场进行了初步的定量分析和反演。图1a显示了2016年9月22日格林尼治标准时间12：22获取的InIRA数据中位于大西洋东南部的灰度图像。图1b显示了1.5 km× 1.5 km的子图像，具有清晰的海洋表面波浪撞击。图2a显示了该地区的海面风速（从4 m/s到8.5 m/s）。图2b显示了检索到的海洋表面波。该海域波浪传播方向为西南向东北（部分为西向东），波长为70 ~ 210 m，有效波高为2.4 ~ 3.2 m。结果表明，InIRA能有效地定量反演风浪。
The TG-2 (Tiangong-2, means “Heavenly Palace 2”) is a Chinese space laboratory which was launched on September 15, 2016 from Jiuquan Satellite Launch Centre aboard a Long March 2F rocket. The onboard interferometric imaging radar altimeter (InIRA) is a new generation radar altimeter developed by China and also the first on orbit wide swath imaging radar altimeter, which integrates interferometry, synthetic aperture, and height tracking techniques at small incidence angles. The InIRA was switch on to acquire data during this mission on September 22, 2016. The preliminary quantitative analysis and retrieval of ocean winds and waves (Figs 1 and 2) have been given from the first batch of InIRA data by State Key Laboratory of Satellite Ocean Environment Dynamics (SOED), Second Institute of Oceanography (SIO), State Oceanic Administration (SOA), China. Figure 1a shows the gray scale image located in the southeast Atlantic Ocean from the InIRA data acquired at 12: 22 GMT on September 22, 2016. Figure 1b shows the 1.5 km× 1.5 km sub-image with clear ocean surface wave strikes. Figure 2a shows the retrieved sea surface wind speeds of this area (from 4 m/s to 8.5 m/s). Figure 2b shows the retrieved ocean surface waves. The waves propagate from southwest to northeast (some from west to east) with wavelength from 70 m to 210 m and significant wave height (SWH) from 2.4 m to 3.2 m in this area. It is concluded that winds and waves can be effectively retrieved from the InIRA quantitatively.