NOAA’s Geostationary Extended Observations (GeoXO) satellite system is the ground-breaking mission that will advance Earth observations from geostationary orbit. GeoXO will supply vital information to address major environmental challenges of the future in support of U.S. weather, ocean, and climate operations.
The GeoXO mission will continue and expand observations provided by the GOES-R Series as NOAA's next generation of geostationary satellites. GeoXO will bring new capabilities to address emerging environmental issues and challenges that threaten the security and well-being of every American.
NOAA is working to ensure these critical observations are in place by the early 2030s as the GOES-R Series nears the end of its operational lifetime.
Advancing NOAA’s Mission
GeoXO will watch over the Western Hemisphere as part of a NOAA observing system that provides world-class environmental information to support both long-term planning and short-term response. This observing system will power increasingly sophisticated models that forecast climate-change-driven weather patterns never seen before.
With GeoXO, made-to-order data delivery will allow users to customize data access to facilitate more accessible and usable environmental information. Multiple data delivery options will be available, including an internet storefront, mobile device access, and satellite broadcast. Cloud-based product generation will expand data access, increase community involvement, and continuously evolve service.
New and Improved Observations
New technology and scientific advancements will improve observations for weather forecasting and provide new ocean and atmospheric measurements. GeoXO will provide real-time, high-resolution visible and infrared imagery for monitoring Earth’s weather, oceans, and environment. Data from GeoXO will contribute to weather forecast models and drive short-term weather forecasts and severe weather warnings. GeoXO will also provide advanced detection and monitoring of environmental hazards like wildfires, smoke, dust, volcanic ash, drought, and flooding.
Additional observations are recommended to address our changing planet and evolving user needs. NOAA plans to incorporate day/night visible imagery, infrared sounding, atmospheric composition, and ocean color, as well as an improved lightning mapper in the GeoXO system, pending program approval. These observations will provide vital data to complement those from NOAA’s partners in Europe and Asia, building a critical global observing system.
User Needs Inform GeoXO Capabilities
NOAA, its users, and industry partners conducted a number of capability studies, observation simulation experiments, value assessments, future scenario evaluations, societal and economic benefit evaluations, and user needs workshops, surveys, and interviews to determine which observations are the highest priority for GeoXO to provide.
GeoXO Core Capabilities
Data continuity; spatial and spectral resolution improvements
Solar and Space Weather Monitoring
Data continuity (GeoXO to accommodate space weather instruments)
Data Collection System Ingest
Data Collection System (DCS), Emergency Managers Weather Information Network (EMWIN), High Rate Information Transmission (HRIT) Data Rebroadcast
Service continuity; potential use of commercial services
GeoXO Recommended Capabilities
Data continuity; spatial resolution improvements
New capability for numerical weather prediction and nowcasting
New capability for nighttime cloud, fog, and smoke tracking
Ocean Color Imagery
New capability for ocean health and productivity monitoring
Atmospheric Composition Measurement
New capability for detection of air quality threats
Sustaining a Weather-Ready Nation
Visible and Infrared Imagery
High-resolution imagery is the backbone of Earth observations. The GeoXO imager will improve upon the GOES-R Advanced Baseline Imager by providing more detailed observations and more precise tracking of severe weather. GeoXO will also detect wildfires four times smaller, potentially increasing lead time to respond to a blaze before it gets out of control. Additional channels will better detect water vapor in the atmosphere.
Day/Night Visible Imagery
Nighttime visible imagery from geostationary orbit will dramatically improve the ability to detect and track fog at night, characterize the formation of tropical storms, monitor power outages/recovery in real-time, provide a new lights-based search and rescue utility, and introduce the ability to detect and track air quality and visibility hazards such as smoke and dust at night.
Lightning mapping from geostationary orbit improves severe storm analysis, lightning hazard detection, hurricane intensity prediction, wildfire response, and precipitation estimation, and mitigates aviation hazards. A GeoXO lightning mapper will potentially improve resolution over the GOES-R Geostationary Lightning Mapper.
A GeoXO infrared sounder will provide real-time, information about the vertical distribution of atmospheric temperature and water vapor to feed advanced numerical weather prediction models and improve short-term severe weather forecasting.
Supporting Healthy Oceans, Resilient Coasts, and Climate Science
Atmospheric composition measurements from geostationary orbit will improve air quality monitoring to mitigate health impacts from severe pollution and smoke events.
A GeoXO ocean color imager will provide observations of ocean biology, chemistry, and ecology to assess ocean productivity, ecosystem change, coast/inland water quality, and hazards like harmful algal blooms.
Recommended GeoXO Constellation
NOAA evaluated a range of space architecture options for delivering the recommended GeoXO observations effectively and efficiently. NOAA is currently planning, pending approval, a three-satellite GeoXO operational constellation. Spacecraft in the current GOES-East and GOES-West positions will carry an imager, lightning mapper, and ocean color instrument, and a centrally-located spacecraft will carry a sounder and atmospheric composition instrument. A day/night band, or channel, is recommended as part of either the imager or the sounder. This constellation can also accommodate a partner payload on the spacecraft flying in the central location.
Below is the recommended GeoXO constellation as of April 28, 2021. This constellation is preliminary, pending program approval.
NOAA assessed user needs and studied a variety of potential observational capabilities. These analyses will inform key decisions to be made in 2021. Once the GeoXO requirements are defined, pilot studies will lead to the preliminary design of the spacecraft and instruments. As the program moves into the critical design stage, NOAA will begin preparing data users for new capabilities the GeoXO system will provide. The first GeoXO launch is planned for the early 2030s and will maintain and advance NOAA’s critical geostationary observations through 2055.
July 23, 2021: The GeoXO Program was formally approved to begin the technology and development phase of the mission " Phase A" on July 21, 2021. The joint NOAA/NASA Agency Program Management Council affirmed the program addresses a critical need and the proposed mission concept is feasible. During Phase A, the GeoXO Program will develop the final mission concept, system-level requirements, necessary system technology developments, and program/project technical management plans.
Collaboration Delivers the Mission
GeoXO is a NOAA program, supported by NASA. NASA will manage the development of the satellites and launch them for NOAA, which will operate them and deliver data to users worldwide.
Industry partners are critical to meeting the mission. NOAA and NASA will work with commercial partners to design and build the GeoXO spacecraft and instruments. Instrument definition and design development studies are underway.
GeoXO procurement notices
- November 20, 2020: GeoXO Imager Phase A Study Request for Proposals
- January 14, 2021: GeoXO Lightning Detector Focal Plane Array Request for Information (RFI)
- April 30, 2021: GeoXO Sounder (GXS) Phase A Study Request for Proposals
- May 18, 2021: GeoXO Spacecraft Request for Information
- June 15, 2021: GeoXO Lightning Mapper (LMX) Request for Information
- July 19, 2021: GeoXO Atmospheric Composition (ACX) Request for Information
- August 25, 2021: GeoXO Ocean Color (OCX) Phase A Study Request for Proposals
Phase A studies
NASA will award a number of contracts for "Phase A" studies as part of GeoXO instrument formulation activities. These definition-phase study and development contracts will help define each instrument's potential performance, risks, costs, and development schedule.
On March 31, 2021, NASA awarded GeoXO Imager (GXI) Phase A study contracts to L3Harris Technologies, Inc., and Raytheon Company. Each company will conduct a one-year study to develop an infrared and visible imaging instrument concept and mature necessary technology.
On September, 30, 2021 NASA selected Ball Aerospace & Technologies Corporation of Boulder, Colorado, for a GeoXO Sounder (GXS) Phase A Study to conduct a definition-phase study of a geostationary hyperspectral infrared Sounder instrument.
On September, 30, 2021 NASA selected L3Harris Technologies Inc. of Fort Wayne, Indiana, for a GeoXO Sounder (GXS) Phase A Study to conduct a definition-phase study of a geostationary hyperspectral infrared Sounder instrument.
Download the PDF version of the GeoXO fact sheet.
This information is subject to change as the GeoXO program develops.