The Workshop on Achieving Satellite Instrument Calibration for Climate Change (ASIC3) was a follow-up to a 2002 Workshop (Ohring et al., 2004; Ohring et al., 2005) that had developed the measurement requirements for a number of global climate variables. The 2002 Workshop defined the absolute accuracies and long-term stabilities of global climate data sets that are needed to detect expected trends, assessed needed satellite instrument accuracies and stabilities, and evaluated the ability of then current observing systems to meet these requirements.The major objective of the ASIC3 workshop was to formulate a national roadmap for developing the calibration systems needed to monitor long-term global climate change from space. The Workshop brought together some 100 participants, including experts in satellite instrument calibration, metrology scientists from the U.S. and U.K. national standards institutes, and remote sensing specialists. The Workshop format consisted of plenary sessions with invited papers, and breakout groups that reported to plenary sessions. Invited papers covered the following topics: Agency Roles, Review of Requirements for Measuring Global Climate Change, Calibration Status for Current Instruments and Plans for Future Instruments, and Concepts and Methodologies for Achieving Calibration of Global Climate Change Measurements. Copies of the invited workshop presentations may be viewed at http://www.ASIC3.sdl.usu.edu/
using the username guest and the password ASIC32006.