Pearl River Estuary, China
The large body of water is the Pearl River Estuary in China, where the Pearl River (Zhujiang River) flows into the South China Sea.
The east coast of the estuary appears white and is heavily populated, while the west coast has more agriculture.
Many ships can be seen moving in and out of the estuary, and up and down the river.
Moving northward up the Pearl River in the full image, the city of Guangzhou (Canton) is easily seen. It is the third most populous metropolitan area in mainland China, and thus appears as a sprawling, bright white area.
Upon opening the full image, the peninsula of Macau, formed by the Pearl River estuary on the east and the Xijiang (West River) on the west, can be seen. It is highly populated and has no agriculture, pastures nor forests.
Finally, part of Hong Kong is visible on the bottom right of the full image. It is one of the most densely populated areas in the world, even more so than Guangzhou and Macau, and thus seen as bright white by the radar.
To see a color image of this region from a previous article, please click here.