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PACE launched into Earth orbit on 2024-02-08 and is extending and improving NASA's over 20-year satellite observation record of global ocean biology, aerosols (tiny particles suspended in the atmosphere), and clouds.
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PACE [launched into Earth orbit][launch] on 2024-02-08 and is extending and improving NASA's over 20-year satellite observation record of global ocean biology, aerosols (tiny particles suspended in the atmosphere), and clouds.
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The mission aims to assess ocean health by measuring the distribution of phytoplankton (tiny plants and algae that sustain the marine food web).
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It also improves measurement of key atmospheric variables associated with air quality and Earth's climate.
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There are two science instruments on the PACE satellite:
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- The Ocean Color Instrument (**OCI**) is a spectrometer that measures intensity of light over portions of the electromagnetic spectrum: ultraviolet (UV), visible, near infrared, and several shortwave infrared bands.
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- The Ocean Color Instrument ([OCI]) is a spectrometer that measures intensity of light over portions of the electromagnetic spectrum: ultraviolet (UV), visible, near infrared, and several shortwave infrared bands.
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OCI enables continuous measurement of light at finer wavelength resolution than previous NASA ocean color sensors, providing detailed information on our global ocean.
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The color of the ocean is determined by the interaction of sunlight with substances or particles present in seawater such as chlorophyll, a green photosynthetic pigment found in phytoplankton and land plants.
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- The multi-angle polarimeters **HARP2** and **SPEXone** are radiometers that measures how the oscillation of sunlight within a geometric plane - known as its polarization - is changed by passing through clouds, aerosols, and the ocean.
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- The multi-angle polarimeters [HARP2] and [SPEXone] are radiometers that measures how the oscillation of sunlight within a geometric plane - known as its polarization - is changed by passing through clouds, aerosols, and the ocean.
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Measuring polarization states of UV-to-shortwave light at various angles provides new information on the atmosphere and clouds, such as particle size and composition.
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