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First TSI results and status report of the CLARA/NorSat-1 solar absolute radiometer

Published online by Cambridge University Press:  03 March 2020

Benjamin Walter ,
Bo Andersen ,
Alexander Beattie ,
Wolfgang Finsterle ,
Greg Kopp ,
Daniel Pfiffner  and
Werner Schmutz
Benjamin Walter
Affiliation:
Physikalisch Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC), Davos, Switzerland email: benjamin.walter@pmodwrc.ch
Bo Andersen
Affiliation:
Norwegian Space Center, Oslo, Norway
Alexander Beattie
Affiliation:
Space Flight Laboratory, Institute for Aerospace Studies, University of Toronto, Canada
Wolfgang Finsterle
Affiliation:
Physikalisch Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC), Davos, Switzerland email: benjamin.walter@pmodwrc.ch
Greg Kopp
Affiliation:
Laboratory for Atmospheric and Space Physics, Boulder, Colorado, USA
Daniel Pfiffner
Affiliation:
Physikalisch Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC), Davos, Switzerland email: benjamin.walter@pmodwrc.ch
Werner Schmutz
Affiliation:
Physikalisch Meteorologisches Observatorium Davos and World Radiation Center (PMOD/WRC), Davos, Switzerland email: benjamin.walter@pmodwrc.ch
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Abstract

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The Compact Lightweight Absolute Radiometer (CLARA) is orbiting Earth on-board the Norwegian NorSat-1 micro-satellite since 14th of July 2017. The first light total solar irradiance (TSI) measurement result of CLARA is 1360.18 W m−2 for the so far single reliable Channel B. Channel A and C measured significantly lower (higher) TSI values and were found being sensitive to satellite pointing instabilities. These channels most likely suffer from electrical interference between satellite components and CLARA, an effect that is currently under investigation. Problems with the satellite attitude control currently inhibit stable pointing of CLARA to the Sun.

Keywords

Absolute radiometerSunTotal Solar Irradiance

References

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