GRWG Web Meeting 2010-11-18
Traceability to Common References
Tim Hewison (EUMETSAT) - Introduction
Rüdiger Kessel (NIST) - Theoretical Background: Concept of Traceability in Metrology: Reference_and_Spectral_response.ppt
Tim Hewison (EUMETSAT) - Practical Example: Defining Common Channels for GEO IR Imagers: Common_References_for_GEO.ppt
All - Discussion
EUMETSAT: Tim Hewison
NIST: Rüdiger Kessel, Dave Walker, Raju Datla
JMA: Hiromi Owada, Yuki Kosaka, Arata Okuyama
NOAA: Bob Iacovazzi, Fangfang Yu
To overcome the problem of providing a common reference against which inter-calibration of multiple instrument pairs can be combined, it was proposed that new standard reference channels are defined. These would then be used to generate a new class of GSICS product, which could also be beneficial to some users - e.g. for the generation of composite images from multiple Geostationary imagers with different channels.
It was agreed that potential users should be contacted to solicit their opinion on the usefulness of such a product, and to provide feedback on what combinations of instruments/channels should be considered and at the levels of uncertainty they would require for different applications. It is only then that we can judge whether these are achievable and what level of sophistication is needed to define standard reference channels for these applications. Action: Tim Hewison will pursue these questions with ISCCP, CM-SAF, Earth Radiation Budget and CLARREO.
- 15 Nov 2010