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SatDAAC (Satellite Data Analysis and Archive Center) is a sophisticated software package that automatically processes and analyzes data from terrestrial and space-based instruments for near real-time and post-processing science applications.
The package provides a complete, end-to-end solution for managing scientific data, focusing on remote sensing of the atmosphere for weather, climate, space weather, and other applications. Its flexible, modular design also enables organizations to develop and run their own application software within the processing system, or to use the system to process their own data.


The University Corporation for Atmospheric Research has over 20 years of experience in processing data for weather, climate, and geodetic science applications. The research, development, and processing are managed by the COSMIC Program (Constellation Observing System for Meteorology, Ionosphere, and Climate), which is housed at UCAR.
The data and products are provided to more than 3,300 users in 90 countries, including the National Oceanic and Atmospheric Administration's National Weather Service, NOAA's Space Weather Prediction Center, and the U.S. Air Force 557th Weather Wing.


  • Automated processing of Global Navigation Satellite System (GNSS) data collected on the ground or by satellites in low Earth orbit
    • Automated radio occultation (RO) retrievals. This technique produces data about pressure, temperature, and humidity, as well as ionospheric activity, based on the bending of radio waves as they traverse the atmosphere.
    • Automated estimates of atmospheric conditions from ground- and space-based sensors
    • Automated satellite data retrieval via Earth downlink stations

  • Quality control monitoring and data comparison, including automated report generation, web-based monitor displays, and alerting in case of anomalies
  • A modular framework that enables a user to incorporate or "plug in" new sensors and processing algorithms.
  • Management of instrument positions, spacecraft status, and data downlink scheduling
  • Data archiving

UCAR In-House Capabilities:

  • Redundant, geographically separated data processing centers with dual connections to the power grid and internet backbone

  • 24x7 network operations center

  • Processing clusters for high volume data applications

  • Data archive

  • FISMA moderate compliant IT segment

Applications And Uses

SatDAAC has a number of potential applications and uses for the research, academic, and commercial sectors, including:

  • Improving weather forecasts and analyses, especially over data-sparse regions such as the oceans, tropics, and poles
  • Improving the understanding of tropical, midlatitude, and polar weather systems and their interactions
  • Calibrating and validating other instruments
  • Improving space weather prediction and analysis
  • Monitoring variability and change in climate indicators such as temperature and water vapor with unprecedented accuracy
  • Improving evaluation of global climate models
  • Improving the monitoring and prediction of such atmospheric phenomena as equatorial plasma bubbles, which can degrade GNSS performance, and sporadic E clouds, which can disrupt local radio signals


UCAR's scientific and engineering expertise supports SatDAAC in the following areas:
  • Data assimilation for numerical weather prediction and space weather applications
  • Instrument calibration
  • Satellite ground station development, procurement, and installation
  • Precise GNSS receiver positioning
  • Satellite payload systems engineering, integration, and testing
  • Radio wave modeling
  • Online and in-person user training


For more information about capabilities and licensing, please contact:

COSMIC Program,
University Corporation for Atmospheric Research
303-497-2603 |
Scott Rayder
Senior Advisor to the UCAR President
303-497-1673 |

The University Corporation for Atmospheric Research is a nonprofit consortium of more than 100 colleges and universities focused on research and training in the atmospheric and related Earth system sciences. UCAR manages the National Center for Atmospheric Research with sponsorship by the National Science Foundation.