12 October 2015 The Traceable Radiometry Underpinning Terrestrial and Helio Studies (TRUTHS) mission
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Abstract
TRUTHS (Traceable Radiometry Underpinning Terrestrial- and Helio-Studies) is a proposed small satellite mission to enable a space-based climate observing system capable of delivering data of the quality needed to provide the information needed by policy makers to make robust mitigation and adaptation decisions. This is achieved by embedding trust and confidence in the data and derived information (tied to international standards) from both its own measurements and by upgrading the performance and interoperability of other EO platforms, such as the Sentinels by in-flight reference calibration. TRUTHS would provide measurements of incoming (total and spectrally resolved) and global reflected spectrally and spatially (50 m) solar radiation at the 0.3% uncertainty level. These fundamental climate data products can be convolved into the building blocks for many ECVs and EO applications as envisaged by the 2015 ESA science strategy; in a cost effective manner. We describe the scientific drivers for the TRUTHS mission and how the requirements for the climate benchmarking and cross-calibration reference sensor are both complementary and simply implemented, with a small additional complexity on top of heritage calibration schemes. The calibration scheme components and the route to SI-traceable Earth-reflected solar spectral radiance and solar spectral irradiance are described.
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Paul D. Green, Paul D. Green, Nigel P. Fox, Nigel P. Fox, Daniel Lobb, Daniel Lobb, Jonathan Friend, Jonathan Friend, } "The Traceable Radiometry Underpinning Terrestrial and Helio Studies (TRUTHS) mission", Proc. SPIE 9639, Sensors, Systems, and Next-Generation Satellites XIX, 96391C (12 October 2015); doi: 10.1117/12.2192593; https://doi.org/10.1117/12.2192593
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