Aerosols, as observed by PACE’s HARP2 and SPEXone instruments.

PACE Celebrates National Ocean Month With Colorful Views of the...

NASA - What do you give to an ocean that has everything? This year, for National Ocean Month, NASA’s Plankton, Aerosol, Cloud, ocean Ecosystem (PAC...

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6 Ways Satellites are Helping to Monitor our Changing Planet...

European Sting - When ERS-2 came spiralling down to Earth in March, it wasn’t just another satellite burning up in the atmosphere. ERS-2 was the la...

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NASA Images that Reveal the True Color of the Oceans

AS - The waters of the Earth can be blue, of course, but also beige. In fact there are so many hues of blue, shades of green and colors in between ...

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NASA Unveils Ocean Algal Blooms Through Satellite Imaging

National Fisherman - For decades, NASA – the National Aeronautics and Space Administration – has provided satellite images of the sea, revealing ...

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NASA'S PACE Mission is Helping Scientists Understand...

news n'ne - A SpaceX Falcon 9 launched the PACE mission in February this year.  After a brief commissioning period, the spacecraft has initiated oper...

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The Gulf of Oman in the Middle East - NASA launched the PACE (Plankton, Aerosol, Cloud, ocean Ecosystem) satellite aboard a SpaceX Falcon 9 rocket on February 8, 2024. The mis...

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NASA's PACE Satellite will Tackle the Largest Uncertainty...

The Economist - Small things can have big effects. Take the plant plankton that populate the Earth’s oceans. When zooplankton eat them, the phytopl...

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The Plankton, Aerosol, Cloud, ocean Ecosystem Postlaunch Airborne eXperiment (PACE-PAX) will be a field campaign to gather data for the validation of the upcoming PACE mission. PACE-PAX will be conducted in September, 2024, roughly nine months after the launch of PACE. The operational area will be Southern and Central California and nearby coastal regions. Sixty flight hours are planned each for the NASA ER-2 and the CIRPAS Twin Otter. Both will be based in their home airports at NASA Armstrong Flight Research Center and Marina Municipal Airport, respectively. Flights will be coordinated between the aircraft, with PACE overflights, and with surface based observations including ship-based measurements and floats. Data will be made available within six months following the conclusion of the campaign.
More details are in our white paper and website.


PACE-PAX validation objectives
1. Validate new PACE products
2. Assess spatial and temporal scale impact on validation
3. Provide sufficient data to validate in a narrow swath
4. Validate radiometric and polarimetric properties
5. Target specific geometries, season, and time of day
6. Focus on specific processes or phenomena


Mission Scientist: Kirk Knobelspiesse (NASA GSFC)
Deputy Mission Scientist: Brian Cairns (NASA GISS)
Deputy Mission Scientist: Ivona Cetinić (NASA GSFC)
Project Manager: Sommer Nicholas (NASA ARC)
Deputy Project Manager: Judy Alfter (NASA ARC)

PACE Project Scientist: Jeremy Werdell (NASA GSFC)
PACE Deputy Project Scientist: Brian Cairns (NASA GISS)
PACE Deputy Project Scientist: Antonio Mannino (NASA GSFC)
PACE Program Scientist: Laura Lorenzoni (NASA Headquarters)
PACE Deputy Program Scientist: Hal Maring (NASA Headquarters)
PACE Applications Program Lead: Woody Turner (NASA Headquarters)