Abstract

Series of measurements of the distribution of radiance over a clear sky made from locations at approximately 1000, 6000, and 14 000 ft elevation are reported. A theoretical relation is shown to correctly predict the observed variation in radiance with elevation angle in the 2–40 µ wavelength region, where radiation from the sky is mainly due to thermal emission by the atmosphere. In the 0.6–2 µ region where the radiation is mainly scattered sunlight the distribution is related to that which was observed simultaneously in the visible but forward scattering is relatively more important in the near infrared and the relative intensities in the two regions are not constant.

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  1. A summary of the work prior to 1951 is given by O. Lönnqvist, Tellus 3, 148 (1951).
  2. J. Strong, J. Franklin Inst. 232, 1 (1941).
  3. F. A. Brooks, J. Meteorol. 9, 41 (1952).
  4. Sloan, Shaw, and Williams, J. Opt. Soc. Am. 46, 543 (1956).
  5. Bennett, Bennett, and Nagel, NAVORD Rept. 6577 (NOTS 2302) (September, 1959).
  6. Sloan, Shaw, and Williams, J. Opt. Soc. Am. 45, 455 (1955).
  7. D. E. Burch and J. H. Shaw, J. Opt. Soc. Am. 47, 227 (1957).
  8. R. A. Oetjen and E. E. Bell, Progress Rept. No. 8, ARDC Project No. 5-(4-4056) (1955).
  9. R. W. Astheimer and E. M. Wormser, J. Opt. Soc. Am. 49, 179 (1959).
  10. A. LaRocca and G. Zissis, Rev. Sci. Instr. 30, 200 (1959).
  11. R. N. Goody, Quart. J. Roy. Meteorol. Soc. 78, 165 (1952).
  12. Howard, Burch, and Williams, J. Opt. Soc. Am. 46, 334 (1956).
  13. W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University, Blue Hill Meteorological Observatory, Milton, Massachusetts, 1942), p. 93.
  14. D. Brunt, Quart. J. Roy. Meteorol. Soc. 58, 389 (1932).
  15. J. R. Goss and F. A. Brooks, J. Meteorol. 13, 482 (1956).
  16. See reference 13, p. 42.
  17. W. H. Dines and L. H. G. Dines, Mem. Roy. Meteorol. Soc. 2, 1 (1927).
  18. A. Adel, Phys. Rev. 76, 446 (1949).
  19. H. C. van de Hulst, Light Scattering by Small Particles (John Wiley & Sons, Inc., New York, 1957), p. 422.
  20. H. P. Gush and A. V. Jones J. Atmos. Terrestrial Phys. 7, 285 (1955).
  21. E. O. Hulburt, J. Opt. Soc. Am. 31, 467 (1941).
  22. E. V. Ashburn, NAVORD Rept. 3357 (NOTS 932) (August, 1954).

Adel, A.

A. Adel, Phys. Rev. 76, 446 (1949).

Ashburn, E. V.

E. V. Ashburn, NAVORD Rept. 3357 (NOTS 932) (August, 1954).

Astheimer, R. W.

R. W. Astheimer and E. M. Wormser, J. Opt. Soc. Am. 49, 179 (1959).

Bell, E. E.

R. A. Oetjen and E. E. Bell, Progress Rept. No. 8, ARDC Project No. 5-(4-4056) (1955).

Brooks, F. A.

F. A. Brooks, J. Meteorol. 9, 41 (1952).

J. R. Goss and F. A. Brooks, J. Meteorol. 13, 482 (1956).

Brunt, D.

D. Brunt, Quart. J. Roy. Meteorol. Soc. 58, 389 (1932).

Burch, D. E.

D. E. Burch and J. H. Shaw, J. Opt. Soc. Am. 47, 227 (1957).

Dines, L. H. G.

W. H. Dines and L. H. G. Dines, Mem. Roy. Meteorol. Soc. 2, 1 (1927).

Dines, W. H.

W. H. Dines and L. H. G. Dines, Mem. Roy. Meteorol. Soc. 2, 1 (1927).

Elsasser, W. M.

W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University, Blue Hill Meteorological Observatory, Milton, Massachusetts, 1942), p. 93.

Goody, R. N.

R. N. Goody, Quart. J. Roy. Meteorol. Soc. 78, 165 (1952).

Goss, J. R.

J. R. Goss and F. A. Brooks, J. Meteorol. 13, 482 (1956).

Gush, H. P.

H. P. Gush and A. V. Jones J. Atmos. Terrestrial Phys. 7, 285 (1955).

Hulburt, E. O.

E. O. Hulburt, J. Opt. Soc. Am. 31, 467 (1941).

Jones, A. V.

H. P. Gush and A. V. Jones J. Atmos. Terrestrial Phys. 7, 285 (1955).

LaRocca, A.

A. LaRocca and G. Zissis, Rev. Sci. Instr. 30, 200 (1959).

Lönnqvist, O.

A summary of the work prior to 1951 is given by O. Lönnqvist, Tellus 3, 148 (1951).

Oetjen, R. A.

R. A. Oetjen and E. E. Bell, Progress Rept. No. 8, ARDC Project No. 5-(4-4056) (1955).

Shaw, J. H.

D. E. Burch and J. H. Shaw, J. Opt. Soc. Am. 47, 227 (1957).

Strong, J.

J. Strong, J. Franklin Inst. 232, 1 (1941).

van de Hulst, H. C.

H. C. van de Hulst, Light Scattering by Small Particles (John Wiley & Sons, Inc., New York, 1957), p. 422.

Wormser, E. M.

R. W. Astheimer and E. M. Wormser, J. Opt. Soc. Am. 49, 179 (1959).

Zissis, G.

A. LaRocca and G. Zissis, Rev. Sci. Instr. 30, 200 (1959).

Other (22)

A summary of the work prior to 1951 is given by O. Lönnqvist, Tellus 3, 148 (1951).

J. Strong, J. Franklin Inst. 232, 1 (1941).

F. A. Brooks, J. Meteorol. 9, 41 (1952).

Sloan, Shaw, and Williams, J. Opt. Soc. Am. 46, 543 (1956).

Bennett, Bennett, and Nagel, NAVORD Rept. 6577 (NOTS 2302) (September, 1959).

Sloan, Shaw, and Williams, J. Opt. Soc. Am. 45, 455 (1955).

D. E. Burch and J. H. Shaw, J. Opt. Soc. Am. 47, 227 (1957).

R. A. Oetjen and E. E. Bell, Progress Rept. No. 8, ARDC Project No. 5-(4-4056) (1955).

R. W. Astheimer and E. M. Wormser, J. Opt. Soc. Am. 49, 179 (1959).

A. LaRocca and G. Zissis, Rev. Sci. Instr. 30, 200 (1959).

R. N. Goody, Quart. J. Roy. Meteorol. Soc. 78, 165 (1952).

Howard, Burch, and Williams, J. Opt. Soc. Am. 46, 334 (1956).

W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University, Blue Hill Meteorological Observatory, Milton, Massachusetts, 1942), p. 93.

D. Brunt, Quart. J. Roy. Meteorol. Soc. 58, 389 (1932).

J. R. Goss and F. A. Brooks, J. Meteorol. 13, 482 (1956).

See reference 13, p. 42.

W. H. Dines and L. H. G. Dines, Mem. Roy. Meteorol. Soc. 2, 1 (1927).

A. Adel, Phys. Rev. 76, 446 (1949).

H. C. van de Hulst, Light Scattering by Small Particles (John Wiley & Sons, Inc., New York, 1957), p. 422.

H. P. Gush and A. V. Jones J. Atmos. Terrestrial Phys. 7, 285 (1955).

E. O. Hulburt, J. Opt. Soc. Am. 31, 467 (1941).

E. V. Ashburn, NAVORD Rept. 3357 (NOTS 932) (August, 1954).

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