The French Frigate Shoals, highlighted in this ESA's Proba-1 image, is an atoll consisting of a 35-kilometre crescent-shaped reef surrounding a dozen small islets located in the Pacific Ocean about 800 kilometres northwest of Honolulu, Hawaii.
The image was acquired on 9 January 2006 with Proba's Compact High Resolution Imaging Spectrometer (CHRIS), designed to acquire hyperspectral images with a spatial resolution of 17 metres across an area of 13 kilometres.