Solar Physics

, Volume 230, Issue 1–2, pp 111–127 | Cite as

The Total Irradiance Monitor (TIM): Instrument Calibration

  • Greg KoppEmail author
  • Karl Heuerman
  • George Lawrence


The calibrations of the SORCE Total Irradiance Monitor (TIM) are detailed and compared against the designed uncertainty budget. Several primary calibrations were accomplished in the laboratory before launch, including the aperture area, applied radiometer power, and radiometer absorption efficiency. Other parameters are calibrated or tracked on orbit, including the electronic servo system gain, the radiometer sensitivity to background thermal emission, and the degradation of radiometer efficiency. The as-designed uncertainty budget is refined with knowledge from the on-orbit performance.


Thermal Emission Absorption Efficiency Servo System Uncertainty Budget Instrument Calibration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Bretagnon, P. and Francou, G.: 1988, Astron. Astrophys. 202, 309.ADSGoogle Scholar
  2. Fowler, J., Saunders, R., and Parr, A.: 2000, Metrologia 37, 621.CrossRefADSGoogle Scholar
  3. Hanssen, L. M., Khromchenko, V., Prokhorov, A., and Mekhontsev, S.: 2003, in Proceedings of the 2003 CALCON Program, Logan, UT.Google Scholar
  4. Fröhlich, C., Crommelynck, D. A., Wehrli, C., Anklin, M., Dewitte, S., Fichot, A., Finsterle, W., Jimenez, A., Chevalier, A., and Roth, H.: 1997, Solar Phys. 175, 267.ADSGoogle Scholar
  5. Kopp, G. and Lawrence, G.: 2005, Solar Phys., this volume.Google Scholar
  6. Kopp, G., Lawrence, G., and Rottman, G.: 2005, Solar Phys., this volume.Google Scholar
  7. Lawrence, G. M., Rottman, G., Harder, J., and Wood, T.: 2000, Metrologia 37, 407.CrossRefADSGoogle Scholar
  8. Lean, J.: 2000, Geophys. Res. Lett. 27, 16.CrossRefGoogle Scholar
  9. Press, W., Teutolsky, S., Vetterling, W., and Flannery, B.: 1993, Numerical Recipes: The Art of Scientific Computing, Cambridge University Press, Cambridge.Google Scholar
  10. Shirley, E.: 1998, Appl. Opt. 37, 28, 6581.Google Scholar
  11. Shirley, E.: 2000, NIST Report of Modeling 0000207602.Google Scholar
  12. Spreadbury, P. J.: 1991, IEEE Trans. Instrum. Meas. 40, 343.CrossRefGoogle Scholar
  13. Willson, R. C. and Hudson, H.: 1991, Nature 351, 42.CrossRefADSGoogle Scholar

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Laboratory for Atmospheric and Space PhysicsUniversity of ColoradoBoulderU.S.A.

Personalised recommendations