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Proceedings Paper

Traceable radiometry underpinning terrestrial- and helio-studies (TRUTHS)
Author(s): Nigel P. Fox; James Aiken; John J. Barnett; Xavier Briottet; Ray Carvell; Claus Froehlich; Steven B. Groom; Olivier Hagolle; Joanna D. Haigh; Hugh H. Kieffer; Judith Lean; David B. Pollock; Terence John Quinn; Michael C. W. Sandford; Michael E. Schaepman; Keith P. Shine; Werner K. Schmutz; Phil M. Teillet; Kurtis J. Thome; Michel M. Verstraete; Edward F. Zalewski
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Paper Abstract

The Traceable Radiometry Underpinning Terrestrial- and Helio-Studies (TRUTHS) mission offers a novel approach to the provision of key scientific data wtih unprecedented radiometric accuracy for Earth Observation (EO) and solar studies, which will also establish well-calibrated reference targets/standards to support other SI missions. This paper will present the TRUTHS mission and its objectives. TRUTHS will be the first satellite mission to calibrate its instrumentation directly to SI in orbit, overcoming the usual uncertainties associated with drifts of sensor gain and spectral shape by using an electrical rather than an optical standard as the basis of its calibration. The range of instruments flown as part of the payload will also proivde accurate input data to improve atmospheric radiative transfer codes by anchoring boundary conditions, through simultaneous measurements of aerosols, particulates and radiances at various heights. Therefore, TRUTHS will significantly improve the performance and accuracy of Earth observation misison with broad global or operational aims, as well as more dedicated missions. The providision of reference standards will also improve synergy between missions by reducing errors due to different calibration biases and offer cost reductions for future missions by reducing the demands for on-board calibration systems. Such improvements are important for the future success of strategies such as Global Monitoring for Environment and Security and the implementation and monitoring of international treaties such as the Kyoto Protocol. TRUTHS will achieve these aims by measuring the geophysical variables of solar and lunar irradiance, together with both polarized and un-polarized spectral radiance of the Moon, and the Earth and its atmosphere.

Paper Details

Date Published: 8 April 2003
PDF: 12 pages
Proc. SPIE 4881, Sensors, Systems, and Next-Generation Satellites VI, (8 April 2003); doi: 10.1117/12.462438
Show Author Affiliations
Nigel P. Fox, National Physical Lab. (United Kingdom)
James Aiken, Univ. of Plymouth (United Kingdom)
John J. Barnett, Univ. of Oxford (United Kingdom)
Xavier Briottet, ONERA (France)
Ray Carvell, Brightwell Instruments Ltd. (United Kingdom)
Claus Froehlich, World Radiation Ctr. (Switzerland)
Steven B. Groom, Plymouth Marine Lab. (United Kingdom)
Olivier Hagolle, Ctr. National d'Etudes Spatiales (France)
Joanna D. Haigh, Imperial College of Science, Technology and Medicine (United Kingdom)
Hugh H. Kieffer, U.S. Geological Survey (United States)
Judith Lean, Naval Research Lab. (United States)
David B. Pollock, Univ. of Alabama in Huntsville (United States)
Terence John Quinn, Bureau International des Poids et Measures (France)
Michael C. W. Sandford, Rutherford Appleton Lab. (United Kingdom)
Michael E. Schaepman, Univ. of Zurich (Switzerland)
Keith P. Shine, Univ. of Reading (United Kingdom)
Werner K. Schmutz, World Radiation Ctr. (Switzerland)
Phil M. Teillet, Canada Ctr. for Remote Sensing (Canada)
Kurtis J. Thome, Optical Sciences Ctr./Univ. of Arizona (United States)
Michel M. Verstraete, European Community Joint Research Ctr. (Italy)
Edward F. Zalewski, Optical Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 4881:
Sensors, Systems, and Next-Generation Satellites VI
Hiroyuki Fujisada; Joan B. Lurie; Michelle L. Aten; Konradin Weber; Joan B. Lurie; Michelle L. Aten; Konradin Weber, Editor(s)

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