Graphics Gallery

1. Willson, R.C., (1967) Radiometer comparison tests, JPL Tech. Memorandum 33‑371, Jet Propulsion Laboratory, Pasadena, CA

2. Willson, R.C., (1969), Experimental and theoretical comparison of the JPL active cavity radiometric scale and the international pyrheliometric scale, Tech. Report 32‑1365, Jet Propulsion Laboratory, Pasadena, CA

3. Willson, R.C., (1971), The active cavity radiometric scale, the international pyrheliometric scale and the solar constant, J. Geoph. Res., 76, p.4325

4. Willson, R.C., (1971), Radiometer Comparison Tests, Report 900‑446, Jet Propulsion Laboratory, Pasadena, CA

5. Willson, R.C., (1972), Results of the 1972 Table Mountain radiometer and radiation scale comparisons, Informal report, Jet Propulsion Laboratory, Pasadena, CA

6. Willson, R.C., (1972), Experimental comparisons of the International Pyrheliometric Scale with the Absolute Radiation Scale, Nature, 239, p. 208

7. Willson, R.C., (1973), Active Cavity Radiometer, J. Appl. Optics, 12, P. 810

8. Willson, R.C., (1973), New radiometric techniques and solar constant measurements, J. Solar Energy, 14, P. 203

9. Willson, R.C., (1973), Advances in Pyrheliometric Instrumentation, Proc. Solar Energy Data Workshop, National Science Foundation, Silver Spring, MD, Nov., 1973, p. 50

10. Willson, R.C., (1974), Absolute Radiometry and the Solar Constant, Proc. of the Symposium on Solar Radiation ‑ Measurements and Instrumentation, Smithsonian Institution, Rockville, MD, Nov., 1973.

11. Willson, R.C., (1974), Absolute Radiometry and the Solar Constant, Space Optics, National Academy of Sciences, Washington, DC, p.502

12. Willson, R.C., (1975), Instrumentation for measurements of solar irradiance and atmospheric optical properties, Proc. Soc, Photo‑Optical Instrumentation Engineers, p. 31, San Diego, CA, USA

13. Willson, R.C., (1975), JPL Absolute Radiometry and Solar Constant Measurements, Proc. Workshop on the Solar Constant and the Earth's Atmosphere, Ed. H. Zirin, J. Walter, Big Bear Solar Observatory, Big Bear City, CA, May 19‑21, 1975, p. 301

14. Willson, R.C., J.R. Hickey, (1977), 1976 rocket measurements of the constant and their implications for variation in the solar output in cycle 20, in The Solar Output and Its Variation, Ed. by O.R. White, Colorado Associated University Press, Boulder, CO, USA, 1977

15. Duncan, CH., R.G. Harrison, J.R. Hickey, J.M. Kendall Sr., M.P. Thekaekara, R.C. Willson, (1977), Rocket calibration of the Nimbus‑6 solar constant measurements, Appl. Opt., 16, p. 2690

16. Willson, R.C., (1979), Active cavity radiometer type IV, J. Applied Optics, 18, p.179

17. Willson, R.C., (1980), Active cavity radiometer type V, J. Applied Optics, 19, 3256

18. Willson, R.C., C.H. Duncan, J. Geist, (1980), Direct Measurement of Solar Luminosity Variation, Science, 207, p. 177

19. Willson, R.C., (1981), Solar Total Irradiance Observations by Active Cavity Radiometers, Solar Physics, 74, p.218

20. Willson, R.C., Hudson, H.S., (1981), Astroph. J. Lett., 24, p. 185

21. Willson, R.C., Gulkis, S., Janssen, M., Hudson, H.S., Chapman, G.A., (1981), Observations of solar irradiance variability, Science, 211, p. 700

22. Willson, R.C., (1981d), Observation of solar irradiance variations in balloon, rocket and satellite experiments, Proc. of IAMAP 3rd Scientific Assembly, Hamburg, FRG, August, 1981

23. Willson, R.C., (1981e), Satellite Observations of Solar Irradiance Variability, Working Report # 94, Swiss Meteorological Institute, Zurich, 1981

24. Willson, R.C., (1982), Solar Irradiance Variations and Solar Activity, J. Geoph. Res., 86, P. 4319

25. Hudson, H.S., Silva, S., Woodard, M., Willson, R.C., (1982), Effects of Sunspots on Solar Irradiance, Solar Physics, 76, p.211

26. Hudson, H.S., Willson, R.C., (1982), Sunspots and Solar Variability, in The Physics of Sunspots, Proc. of Conference on Sunspots, Ed. by L. Cram and J. Thomas, Sacramento Peak Observatory, Sunspot, AZ

27. Willson, R.C., (1983d), Solar Radiation, Understanding Climate: A Strategy for Solar and Earth Radiation Research 1984‑94, Ed. R. Schiffer, Office of Space Science and Applications, NASA, Washington, DC, 1983, pp. 6‑13.

28. Willson, R.C., (1984), Measurements of Solar Total Irradiance and its Variability, Space Science Reviews, 38, pp. 203‑242

29. Willson. R.C., (1984), Solar Total Irradiance Observations by the SMM/ACRIM I experiment, Solar Irradiance Variations on Active Region Timescales, NASA Conference Publication 2310, Ed. by B.J. LaBonte, G. Chapman, H.S. Hudson & R.C. Willson, pp. 1‑42

30. Willson, R.C., (1985), Solar Total Irradiance and Its spectral Distribution, The Encyclopedia of Physics, 3rd Ed., Ed. by Robert M. Besancon, Van Nostrand & Co., New York, 1985, pp. 1135‑1143

31. Willson, R.C., (1985), Solar Irradiance Variability Monitoring by Active Cavity Radiometers, Proc. Conf. on Advances in Absolute Radiometry, Ed. P. Foukal, Cambridge, MA, June 24‑25, 1985, p. 6.

32. Willson, R.C., Hudson, H.S., Frohlich, C., Brusa, R.W.; (1986), Long Term Downward Trend in Total Solar Irradiance, Science, 234, pp 1114

33. Willson, R.C., (1987), Results of Space‑Based Total Solar Irradiance Experiments, Proc. of Workshop on Solar Radiative Output Variation, Ed. P. Foukal, National Center for Atmospheric Research, Boulder, CO, Nov. 9‑11, 1987, p. 143

34. Willson, R.C., Hudson, H.S., (1988), Solar Luminosity Variations in Solar Cycle 21, Nature, 332, pp. 810‑12.

35. Willson, R.C., (1988), Space‑Based Solar Irradiance Measurements, Proc. New Developments and Applications in Optical Radiometry, Ed. N. Fox, National Physical Laboratory, Teddington, Middlesex, UK, April 12‑13, 1988

36. Willson, R.C., (1990), Solar Irradiance Variations during Solar Cycles 21 and 22, NASA Conf. Report 3086, Ed. by K. Schatten, A. Arking, p. 279

37. Willson, R.C., Hudson, H.S., (1991), The Sun's Luminosity Over a Complete Solar Cycle, Nature, 351, pp. 42‑44

38. Frohlich, C., Foukal, P.V., Hickey, J.R., Hudson, H.S., Willson, R.C., (1991) Solar Irradiance Variability from Modern Measurements, The Sun in Time, Univ. of Arizona Press, Tucson, AZ, 1991, pp. 11‑29

39. Livingston, W., Donnely, R., Grigoryev, V., Demidov, M., Lean, J., Steffen, M., White, O., Willson. R., (1991), Total Irradiance Variability 1980‑88, The Sun as a Star, Ed. by W. Livingston, Univ. of Arizona Press, Tucson, AZ , 1991, pp. 1109 ‑ 1160

40. Willson, R.C., (1992), Solar Total Irradiance Monitoring, Past, Present and Future, EOS Transactions ‑ AGU, V. 73, No. 14, p. 242, 1992

41. Willson, R.C., (1992), Solar Total Irradiance Variations detected by Flight Experiments: 1978‑1992, EOS Transactions ‑ AGU, V. 73, No. 43, p. 435, 1992

42. Willson, R.C., (1993), Solar Irradiance, Chapter 1, Global Change Atlas, Ed. R. Gurney, J. Foster, C. Parkinson, Cambridge University Press, 1993, pp. 5 ‑ 18

43. Willson, R.C., (1994), Solar Monitoring has a Past and Present, Does it have a Future?, in The Sun as a Variable Star, Proceedings of IAU Colloquium 143, Cambridge University Press, pp. 4-10

44. Willson, R.C., (1994), Irradiance Observations of SMM, Spacelab 1, UARS and ATLAS Experiments, in The Sun as a Variable Star, Proceedings of IAU Colloquium 143, Cambridge University Press, pp. 54-62

45. Willson, R.C., (1994), Solar Total Irradiance Variability and its Climate Implications`, EOS Transactions ‑ AGU, V. 75, No. 16, p. 288, 1994

46. Willson, R.C., (1994d), The Power of the Sun, Chapter 2 of 'The Many Faces of the Sun', Ed. K. Strong, J. Saba and B. Haisch, Springer‑Verlag, 1995

47. Willson, R.C., (1997) Total Solar Irradiance Trend During Solar Cycles 21 and 22, Science, 277, 1963-1965, 1997.

48. Willson, R.C. and A.V. Mordvinov, Time-frequency analysis of total solar irradiance variations, Geophys. Res. Lett. 26, pp. 3613-3616, 1999

49. Mordvinov, A.V., and R.C. Willson, Effects of Activity Complexes and Active Longitudes on Variations in Total Solar Irradiance, Astronomy Letters, Vol. 27, No. 7, pp. 451–454, 2001

Willson, R.C., The ACRIMSAT/ACRIM3 Experiment – Extending the Precision, Long-Term Total Solar Irradiance Climate Database, The Earth Observer, May/June 2001, V. 13, No. 3, pp. 14-17, 2001.

Willson, R.C., Precision of the long-term total solar irradiance database, Proc. Of the 2002 Characterization and Radiometric Calibration for Remote Sensing (CALCON 2002) mtg., Viewgraph 16, Available on CD-ROM from Space Dynamics Laboratory, Utah State University, Logan, UT, 2002.

50. Willson, R.C., A.V. Mordvinov, ( 2003) Secular total solar irradiance trend during solar cycles 21–23, Geophys. Res. Lett., Vol. 30, No. 5, p 1199 [PDF version, PDF version of Supporting Material]

AGU Presentations and Session Conventions:

51. Willson, R. C., and A. V. Mordvinov, ACRIM2 Observations and the Long Term Total Solar Irradiance Database, 2001 AGU Fall Meeting, Session A41D (Oral), 2001p. (URL to A41D)

52. Willson, R. C., H S Hudson, J M Pap, Total Solar Irradiance Variability: Do Observations or Models Imply a Secular Change?, Co-conveners of special sessions SH21B (Oral), 2002 AGU Fall Meeting, 2002m. (URL to SH21B)

53. Willson, R.C., H.S. Hudson, Total Solar Irradiance Monitoring: Results and Strategies, Co-conveners of special sessions SH31C (Oral) and SH32A (Poster), 2003 AGU Fall Meeting, 2003m. (URL to SH31C) (URL to SH32A)

54. Willson, R.C., S. Sofia, Secular Variation of Total Solar Irradiance and Climate, Co-conveners of special sessions SH51E (Oral) and SH53A (poster), 2004 AGU Fall Meeting, 2004m. (URL to SH51E) (URL to SH53A)

55. Willson, R.C., J.M. Pap, Total Solar Irradiance Trends and Traceability , Co-conveners of special sessions SH41A (Oral) and SH53A (poster), 2005 AGU Fall Meeting, 2005m. (URL to SH41A) (URL to SH42A)

56. Willson, R.C., N. Scafetta, A Critical Review of Measurements and Models of Composite Total Solar Irradiance, Co-conveners of special sessions SH22B (Oral) and SH23B (Poster), 2005 AGU Spring Meeting, 2005m. (URL to SH22B) (URL to SH23B)

57. Willson, R.C., N. Scafetta, Total Solar Irradiance Variations and Their Impact on Climate, Co-convener of special sessions SH41A (Oral) and SH43A (Poster), 2006 AGU Fall Meeting, 2006m. (URL to SH41A) (URL to SH43A)