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"description": "This visualization shows the planned orbit of NASA’s PACE mission (Plankton, Aerosol, Cloud, ocean Ecosystem). PACE includes several instruments, but this visualization shows only the Ocean Color Instrument (OCI) data swath revealed as the spacecraft flys over.
The Ocean Color Instrument (OCI) viewing width is 113 degrees. During each orbit on the sunlit side of the Earth, OCI will change its pointing from 20 degrees behind the spacecraft (aft) when south of the Sun's latitude to 20 degrees ahead of the spacecraft (fore) when north. This is to avoid having the instrument’s field of view look into Sun glint. OCI will change its pointing back from fore to aft on the dark side of each orbit.
\r
The PACE mission has been conceived principally as a way to measure ocean color for assessing large scale ocean health. These measurements will provide data to determine the distribution of phytoplankton, tiny plants and algae that sustain the marine food web. A simple way to think about this is the more “green” that’s visible from space, the more prevalent are plant cells containing chlorophyll, an essential green pigment responsible for energy-producing photosynthesis in plants. Phytoplankton populations are fundamental to understanding the overall health of the ocean food web, as well as a wide range of related processes.\r
\r
PACE will be able to see other colors too—a broad range of color, in fact, stretching beyond the bounds of visible light into both ultraviolet as well as infrared. PACE will also be able to make measurements of aerosols in the atmosphere, essential for scientists to improve our understanding of and our ability to forecast weather and climate.\r
PACE continues a more than 20 year legacy of ocean color measurements, providing the scientific community with a long time series of data. That legacy enables better assessments of long term trends about complex processes on Earth.
PACE will be able to see other colors too—a broad range of color, in fact, stretching beyond the bounds of visible light into both ultraviolet as well as infrared. PACE will also be able to make measurements of aerosols in the atmosphere, essential for scientists to improve our understanding of and our ability to forecast weather and climate.
PACE continues a more than 20-year legacy of ocean color measurements, providing the scientific community with a long time series of data. That legacy enables better assessments of long-term trends about complex processes on Earth.",
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