CZCS
The Coastal Zone Color Scanner (CZCS) was a multi-spectral scanner flown on Nimbus-7 satellite in 1978. It was the first instrument designed to measure ocean color and was used to study the distribution and variability of phytoplankton in the world's oceans. The CZCS measured the visible and near-infrared radiation reflected by the ocean surface, which is related to the concentration of chlorophyll-a, the primary pigment in phytoplankton. The data collected by the CZCS provided valuable information on ocean productivity, water quality, and climate change. The CZCS was operational until 1986 when the Nimbus-7 satellite failed.
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