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Essential Principles of GSICS for Weather and Environmental Satellite Data Inter-calibration

This document outlines the fundamental principles of the Global Satellite Inter-calibration System (GSICS) focused on enhancing the accuracy and reliability of satellite data used in operational weather and environmental monitoring. It emphasizes key aspects such as traceability, reproducibility, and openness. The principles aim to foster systematic, ongoing inter-calibration of instruments, ensuring results are consistent and applicable across various satellite observations. The recommendations call for collective input from GSICS members and discuss the need for clear communication of these principles on platforms like GCC/WMO GSICS webpages.

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Essential Principles of GSICS for Weather and Environmental Satellite Data Inter-calibration

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  1. GSICS Principles Jo Schmetz1on behalf of Tim Hewison1 EUMETSAT

  2. GEO-LEO Solar Product Status 2011-10 • Should we spell out the basic GSICS principles? • e.g. As bullet points on GCC/WMO GSICS webpages • in response to users’ requests • and in considering 3rd party submissions to the GPPA. • Needs • consideration by Exec Panel • contribution/agreement from all GSICS members • Some ideas for examples follow • Need further discussion & agreement

  3. GSICS General Principles • e.g. • Traceability • Reproducibility of results • Openness • Applicable to operational weather and environmental satellites of the Global Observing System (GOS) • ??

  4. GSICS Science Principles • Traceability • through an unbroken chain of comparisons • to a common reference • with specified uncertainty • Consistency • Applicable to all instruments in a given class • Systematic • Continuous ongoing inter-calibration over each instrument's operational lifetime • Global • applicable over the full range of observations?? • Based on level 1 data • as supplied by satellite operator • To provide inter-calibration correction function • to allow users to correct original level 1 data • to generate Fundamental Climate Data Records (FCDRs) • To provide bias monitoring • to allow users to visualise any trends in the instruments' calibration • ?

  5. GSICS Data Principles • e.g. • Traceability • Inclusion of meta data giving complete description • Accessibility • Following community standards • Data access (servers) • Data formats • Variable naming

  6. Thank You Any Questions?

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