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Traceability

Traceability. Traceability Statement for AIRS/IASI Outstanding Issues with Traceability Concept How we can strive to resolve these Strategy for CLARREO/TRUTHS. Traceability Statement for AIRS/IASI.

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Traceability

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  1. Traceability Traceability Statement for AIRS/IASI Outstanding Issues with Traceability Concept How we can strive to resolve these Strategy for CLARREO/TRUTHS

  2. Traceability Statement for AIRS/IASI A key aspect to GSICS is to provide evidence to support applicability of the inter-calibration products we develop. A document has been prepared collaboratively by GSICS partners at EUMETSAT, NOAA, NIST and CNES to provide a statement demonstrating the suitability of the hyperspectral spectrometers, AIRS and IASI as inter-calibration references. This discusses the various pre-flight and in-orbit tests that have been performed on these instruments. Particular attention is paid to their relative stability, as this is critical if they are to be used inter-changeably. Various method are described which show that AIRS and IASI offer consistent radiometric calibration – each with uncertainties ~0.1K (k=1). The statement also discusses the traceability chain of AIRS and IASI to the SI international reference standards, which is needed to achieve the long-term goal of GSICS.From Article for GSICS Quarterly Statement: https://docs.google.com/document/pub?id=1D97P3NUQewTp-lXPy12tHcV4xOY2-BYOkYc4qr1Jwm8

  3. Outstanding Issues with Traceability • X. Xiong (NASA) to provide Traceability Statement for Aqua/MODIS • By End 2011 [Action GRWG06_01] • Need Advice on Application of Traceability Concept to • Model Results • Aircraft instruments • Identify experts in traceability issues - NIST and NPL • Raise through CEOS/WGCV? • May need to revise current Traceability Statements…

  4. Strategy for CLARREO/TRUTHS • The US have made the political decision to discontinue the CLARREO concept • But the CLARREO Science Team is still receiving funding. • The team is working on a proposal, due on 5 September 2011, to provide a 5 year outlook for a CLARREO-type of instrument on the ISS or an alternative launch platform. • It is likely that this will only cover a limited IR range as a proof of concept. • The next decadal survey (2014) may change the situation, • as CLARREO is still a highly recommended mission. • TRUTHS is a similar mission, developed by NPL, • but not selected yet as a mission on an ESA spacecraft. • GSICS supports proposals for missions such as CLARREO and TRUTHS to provide SI-traceable inter-calibration references in orbit, and invites WMO to communicate this position to the relevant agencies.

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