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Duacs

Altimetry data for sea level studies & applications

  • Home
  • History and Context
    • Mesoscale
    • Climate
    • Régional and L4P product
  • DUACS Products
    • Copernicus Marine Service products
    • Copernicus Climate Service products
    • Ocean Monitoring Indicators
    • Demonstration and pre-operational products
    • DUACS High Resolution products
  • System
    • L2 Upstream data
    • Acquisition and data selection
    • Homogenization and cross-calibration
    • Along-track (L3) products generation
    • Merged gridded (L4) products generation
    • Quality control
    • System version changes
      • DUACS NRT system impacting version changes
        • Apr 2022: DUACS 19.1.0
        • May 2022: DUACS 19.2.0
        • November 2022 – DUACS-NG 1.0.0
        • November 2023 – DUACS-NG 2.0.0
        • July 2024: DUACS-NG 3.0.0
        • November 2024: DUACS-NG v4.0.0
        • June 2025 : DUACS-NG v4.1.0
        • November 2025: DUACS-NG v4.2.0
      • DUACS MY system impacting version changes
        • January 2023: DT-2021
        • May 2024: MY DT-2021 interim temporal extension
        • Nov 2024: MY DUACS DT-2024 full reprocessing
        • Nov 2025: Demontrative L4 reprocessed series with new MIOST version
  • Products Quality
    • Different sources of error
      • Along-track measurements – main sources of errors
      • Merged product- main sources of errors
    • Estimated Accuracy Numbers
    • Quality report of the NRT production
      • NRT production timeliness
      • Key Performance Indicators
      • L2 upstream products monitoring
      • L3 products monitoring
      • L4 products monitoring
    • Main events impacting quality of NRT DUACS production
  • Studies & Applications
    • Elephant seals turn around eddies
    • Ocean eddies and river plume extension seen from space
    • Gulf Stream seen by altimetry
    • Ierapetra gyre from year to year
    • Twenty-five years of Pacific monitoring by altimetry
  • References
  • FAQ
    • What are the products specification?
      • How are defined the different heights used in altimetry?
      • What is the resolution of the L4 gridded products?
      • What about the mean reference period?
      • Weekly vs daily products
    • Sea Level reprocessing – Which version of the product am I currently using ?
    • What are the differences between the Marine and Climate sea level Products?
    • What about the Global Mean Sea Level (MSL) Indicator?
      • What product should I use to compute the Global Mean Sea Level indicator?
      • Glacial Isostatic Adjustment (GIA)
      • Are DUACS products corrected for the TOPEX-A instrumental drift?
      • Should I use the NRT products to extend the MSL record?
    • How to use of the different variables available in L3 products ?
    • What is the standards used for the different corrections for DT and NRT production ?
HomeProducts QualityQuality report of the NRT production

Quality report of the NRT production

In this page are presented some metrics that monitor the quality of the daily DUACS NRT production.

Key Performance Indicators L2 upstream products monitoring L3 products monitoring

 

 L4 products monitoring

 

Main events impacting the NRT product quality are listed here

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