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| CERES–FM1 | |
|---|---|
| Name | CERES–FM1 |
| Mission type | Earth observation |
| Operator | National Aeronautics and Space Administration / Department of Defense (United States) collaboration |
| Orbit type | Sun-synchronous |
CERES–FM1 is a spaceborne radiometric instrument module designed to measure Earth's outgoing longwave and shortwave radiation budget as part of a climate observation program. The module contributes to long-term records maintained by agencies such as National Aeronautics and Space Administration, NOAA, and international partners including European Space Agency and Japan Aerospace Exploration Agency, supporting research in atmospheric physics, climate change, and energy balance.
CERES–FM1 belongs to a series of radiometers flown to quantify top-of-atmosphere radiative fluxes and albedo, extending datasets produced by instruments on platforms like Terra (satellite), Aqua (satellite), and Suomi NPP. The instrument interfaces with satellite buses developed by contractors including Northrop Grumman and Ball Aerospace, and its data streams feed assimilation systems used by European Centre for Medium-Range Weather Forecasts, National Centers for Environmental Prediction, and climate syntheses such as Intergovernmental Panel on Climate Change assessments.
The development drew on heritage from earlier missions operated by NASA Langley Research Center, Langley Research Center teams, and industrial partners such as Hamilton Sundstrand and Honeywell International. Optical and detector design incorporated lessons from instruments like ERBE and MODIS, with radiometric calibration standards traceable to facilities at National Institute of Standards and Technology and laboratory work at Jet Propulsion Laboratory. Mechanical and thermal design referenced engineering practices from spacecraft such as Landsat 8 and ICESat-2, while systems engineering followed processes codified by Institute of Electrical and Electronics Engineers and procurement oversight by United States Department of Defense acquisition offices.
The flight module was integrated for launch on a vehicle provided by firms like United Launch Alliance or SpaceX depending on the manifest, with countdown operations coordinated at launch ranges such as Cape Canaveral Space Force Station or Vandenberg Space Force Base. Post-launch commissioning involved teams from NASA Goddard Space Flight Center and NOAA Satellite and Information Service, executing orbit insertion into a sun-synchronous orbit and on-orbit checkout procedures developed from standards used on Landsat and Sentinel missions. The deployment sequence included instrument turn-on, thermal equilibration, and validation campaigns with ground sites like ARM (Atmospheric Radiation Measurement) Climate Research Facility and radiosonde launches from NOAA Earth System Research Laboratory.
The module houses broadband radiometers with spectral channels tuned to shortwave and longwave bands, leveraging detector technologies advanced at California Institute of Technology and calibration methodologies from National Oceanic and Atmospheric Administration laboratories. Primary objectives mirror those of programs such as A-train and include quantifying Earth’s radiation budget, monitoring surface albedo changes, and validating climate model radiation parameterizations used by Hadley Centre and Geophysical Fluid Dynamics Laboratory. Secondary objectives support cloud property retrievals related to missions like CloudSat and CALIPSO through coordinated observations and cross-calibration with instruments aboard MODIS-equipped platforms.
Operational control and data handling were performed by mission operations centers modeled after NASA Goddard, with data pipelines adopting architectures from Earth Observing System Data and Information System and formats compatible with NetCDF conventions promoted by Unidata. Level 0 to Level 3 processing chains used algorithms developed in partnerships with academic groups at Massachusetts Institute of Technology, University of Colorado Boulder, and University of Reading, and validation employed networks like AERONET and intercomparisons with datasets from CERES family predecessors. Quality assurance integrated software practices described by Committee on Earth Observation Satellites and archives were distributed via portals used by NOAA CLASS and NASA Earthdata.
Data from the instrument contributed to estimates of Earth's radiative imbalance cited in studies by Intergovernmental Panel on Climate Change authors and climate modeling centers such as Max Planck Institute for Meteorology and National Center for Atmospheric Research. Applications included trend detection in outgoing longwave radiation relevant to research by James Hansen-era groups, evaluation of cloud feedbacks investigated at Laboratoire des Sciences du Climat et de l'Environnement, and support for satellite-based energy budget assessments employed by World Meteorological Organization initiatives. Cross-disciplinary uses spanned hydrology studies at US Geological Survey, agriculture monitoring linked to Food and Agriculture Organization, and validation of surface radiation for solar energy projects coordinated with International Energy Agency.
The mission was funded through partnerships among NASA, NOAA, and defense or agency contributors such as United States Air Force space programs, with industrial contracts awarded to aerospace companies including Ball Aerospace and Northrop Grumman. International scientific collaboration involved institutions like European Space Agency, Japan Aerospace Exploration Agency, and research universities including Stanford University and University of Oxford, while programmatic oversight referenced directives from Office of Science and Technology Policy and budget appropriations by the United States Congress.