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Joint Polar Satellite System | NESDIS
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Joint Polar Satellite System

The Mission

Artist 3D render of the JPSS-4 in space above the Earth
Render of JPSS-4

NOAA’s Joint Polar Satellite System (JPSS) provides global observations that serve as the backbone of both short- and long-term forecasts, including those that help us predict and prepare for severe weather events. The five satellites scheduled in the fleet are the currently-flying NOAA/NASA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite, NOAA-20, previously known as JPSS-1, NOAA-21, previously known as JPSS-2, and the upcoming JPSS-3 and JPSS-4 satellites.

JPSS-4, to be renamed NOAA-22 in orbit, will be the next JPSS satellite to launch, with a launch readiness date of 2027. In addition to the four instruments flying on NOAA-21, JPSS-4 will include Libera, an instrument that will improve our understanding of trends in Earth’s energy imbalance and our changing climate.

JPSS satellites circle the Earth from pole to pole and cross the equator about 14 times daily in the afternoon orbit to provide full global coverage twice a day. In doing so, they provide the majority of data that informs numerical weather forecasting in the U.S. and deliver critical observations during severe weather events like hurricanes and blizzards.

Explore

image of the jpss satellite
Learn about the JPSS fleet of satellites and the instruments onboard.
Satellite Facts
Image of the JPSS Science Digest
The JPSS Program Science Team ensures the scientific integrity of the JPSS mission as well as develops and trains scientific products and applications.
Learn more
Image of satellite Ground Stations
Learn about the series of antennas, communications networks, and processing facilities that make up the JPSS Ground System.
JPSS Ground System
Image of a satellite drawn
STEM activities and lessons to teach K-12 students and the general public about how and why polar-orbiting weather satellites observe Earth and its atmosphere.
Educational Resources

Key Facts

Artist 3D render of the JPSS-4 in space above the Earth
JPSS-4

JPSS-4 is the next satellite to be slated to launch in 2027.

A artist rendering of the JPSS Program Satellites

The five satellites scheduled in the fleet are the currently-flying NOAA/NASA Suomi National Polar-orbiting Partnership (Suomi NPP) satellite, NOAA-20, previously known as JPSS-1, NOAA-21, previously known as JPSS-2, and the upcoming JPSS-3 and JPSS-4 satellites.

Each satellite carries at least four state-of-the-art instruments, including the Advanced Technology Microwave Sounder (ATMS), the Cross-Track Infrared Sounder (CrIS), the Visible Infrared Imaging Radiometer Suite (VIIRS), the Ozone Mapping and Profiler Suite (OMPS). Some of the satellites, like Suomi NPP, NOAA-20 and JPSS-4, carry an instrument to measure the Earth’s energy budget: the Clouds and the Earth's Radiant Energy System (CERES) and Libera.

Image of the atlas five rocket launch carrying JPSS-2 Satellite

JPSS is launched form Vandenberg Space Force in California. The satellite needs to launch from the West Coast in order to get into the right position for a polar orbit.

 

NOAA-21, NOAA-20, and Suomi NPP Orbits

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JPSS News









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