Abstract

<p>The accuracy of spectroscopic absorptance measurements can be seriously affected by the presence of absorbing species in the atmosphere anywhere in the optical train. The error is due to the band-pass nature of a monochromator, and therefore is just as severe when a double-beam spectrometer is used as when a single-beam spectrometer is used.</p><p>Using a method recently developed by Sakai for the calculation of the integrated absorptance of a pair of overlapping absorption lines, we have calculated the error in the measured integrated absorptance of a sample gas which contains H<sub>2</sub>O or CO<sub>2</sub>. The method used places no restrictions on the half-width or strength of either line. Factors have been derived for correcting the measured absorptance in a number of experimentally important cases. The calculated correction factors give results which are in good agreement with experiments made using a spectrometer in which the atmospheric H<sub>2</sub>O and CO<sub>2</sub> were removed from the optical train.</p>

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  1. F. Paschen, Ann. Physik 50, 409 (1893).
  2. C. P. Courtoy, Can. J. Phys. 5, 608 (1957).
  3. W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University Press, Cambridge, Massachusetts, 1942).
  4. G. P. Kuiper, Astrophys. J. 106, 252 (1947).
  5. W. M. Sinton, Planets and Satellites (University of Chicago Press, Chicago, 1961).
  6. G. N. Plass, Ann. N. Y. Acad. Sci. 95, 61 (1961).
  7. J. N. Howard, D. E. Burch, and D. Williams, J. Opt. Soc. Am. 46, 186, 237, 242, 334, 452 (1956).
  8. H. J. Babrov and R. H. Tourin, J. Quant. Spectry. Radiative Transfer 3, 17 (1963).
  9. G. J. Penzias, G. Jordan Maclay, and H. J. Babrov, NASA CR 1, "Final Report on Phase II of Contract NAS 3-1542," NASA Lewis Research Center, Cleveland, Ohio (1962).
  10. D. E. Burch, D. Gryvanak, and D. Williams, AFCRL-255, Geophysics Research Directorate, Hanscom Field, Bedford, Massachusetts (1960).
  11. D. E. Burch and D. Gryvnak, Technical Report, Contract Nonr 3560(00) (1962).
  12. H. J. Babrov, J. Opt. Soc. Am. 51, 171 (1961).
  13. H. Sakai, Johns Hopkins University, Laboratory for Astrophysics and Meteorology, Progress Report, Contract Nonr 248(58) (1962).
  14. H. Sakai and F. Stauffer, J. Opt. Soc. Am. 53, 507 (1963).
  15. L. D. Kaplan and D. Eggers, J. Chem. Phys. 25, 876 (1956).
  16. R. Ladenburg and F. Reiche, Ann. Physik 42, 181 (1913).
  17. W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).
  18. W. S. Benedict (private communication, 1963).
  19. R. H. Schwendeman and V. W. Laurie, Tables of Line Strengths for Rotational Transitions of Asymmetric Rotor Molecules (Pergamon Press, Inc., New York, 1958).
  20. W. S. Benedict and L. D. Kaplan, J. Chem. Phys. 30, 388 (1959).
  21. U. P. Oppenheim and Y. Ben-Aryeh, J. Opt. Soc. Am. 53, 344 (1963).
  22. G. N. Plass, J. Opt. Soc. Am. 48, 690 (1958).

Babrov, H. J.

H. J. Babrov and R. H. Tourin, J. Quant. Spectry. Radiative Transfer 3, 17 (1963).

G. J. Penzias, G. Jordan Maclay, and H. J. Babrov, NASA CR 1, "Final Report on Phase II of Contract NAS 3-1542," NASA Lewis Research Center, Cleveland, Ohio (1962).

H. J. Babrov, J. Opt. Soc. Am. 51, 171 (1961).

Ben-Aryeh, Y.

U. P. Oppenheim and Y. Ben-Aryeh, J. Opt. Soc. Am. 53, 344 (1963).

Benedict, W. S.

W. S. Benedict and L. D. Kaplan, J. Chem. Phys. 30, 388 (1959).

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).

W. S. Benedict (private communication, 1963).

Burch, D. E.

D. E. Burch and D. Gryvnak, Technical Report, Contract Nonr 3560(00) (1962).

D. E. Burch, D. Gryvanak, and D. Williams, AFCRL-255, Geophysics Research Directorate, Hanscom Field, Bedford, Massachusetts (1960).

J. N. Howard, D. E. Burch, and D. Williams, J. Opt. Soc. Am. 46, 186, 237, 242, 334, 452 (1956).

Courtoy, C. P.

C. P. Courtoy, Can. J. Phys. 5, 608 (1957).

Eggers, D.

L. D. Kaplan and D. Eggers, J. Chem. Phys. 25, 876 (1956).

Elsasser, W. M.

W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University Press, Cambridge, Massachusetts, 1942).

Gryvanak, D.

D. E. Burch, D. Gryvanak, and D. Williams, AFCRL-255, Geophysics Research Directorate, Hanscom Field, Bedford, Massachusetts (1960).

Gryvnak, D.

D. E. Burch and D. Gryvnak, Technical Report, Contract Nonr 3560(00) (1962).

Herman, R.

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).

Howard, J. N.

J. N. Howard, D. E. Burch, and D. Williams, J. Opt. Soc. Am. 46, 186, 237, 242, 334, 452 (1956).

Kaplan, L. D.

L. D. Kaplan and D. Eggers, J. Chem. Phys. 25, 876 (1956).

W. S. Benedict and L. D. Kaplan, J. Chem. Phys. 30, 388 (1959).

Kuiper, G. P.

G. P. Kuiper, Astrophys. J. 106, 252 (1947).

Ladenburg, R.

R. Ladenburg and F. Reiche, Ann. Physik 42, 181 (1913).

Laurie, V. W.

R. H. Schwendeman and V. W. Laurie, Tables of Line Strengths for Rotational Transitions of Asymmetric Rotor Molecules (Pergamon Press, Inc., New York, 1958).

Maclay, G. Jordan

G. J. Penzias, G. Jordan Maclay, and H. J. Babrov, NASA CR 1, "Final Report on Phase II of Contract NAS 3-1542," NASA Lewis Research Center, Cleveland, Ohio (1962).

Moore, G. E.

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).

Oppenheim, U. P.

U. P. Oppenheim and Y. Ben-Aryeh, J. Opt. Soc. Am. 53, 344 (1963).

Paschen, F.

F. Paschen, Ann. Physik 50, 409 (1893).

Penzias, G. J.

G. J. Penzias, G. Jordan Maclay, and H. J. Babrov, NASA CR 1, "Final Report on Phase II of Contract NAS 3-1542," NASA Lewis Research Center, Cleveland, Ohio (1962).

Plass, G. N.

G. N. Plass, Ann. N. Y. Acad. Sci. 95, 61 (1961).

G. N. Plass, J. Opt. Soc. Am. 48, 690 (1958).

Reiche, F.

R. Ladenburg and F. Reiche, Ann. Physik 42, 181 (1913).

Sakai, H.

H. Sakai, Johns Hopkins University, Laboratory for Astrophysics and Meteorology, Progress Report, Contract Nonr 248(58) (1962).

H. Sakai and F. Stauffer, J. Opt. Soc. Am. 53, 507 (1963).

Schwendeman, R. H.

R. H. Schwendeman and V. W. Laurie, Tables of Line Strengths for Rotational Transitions of Asymmetric Rotor Molecules (Pergamon Press, Inc., New York, 1958).

Silverman, S.

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).

Sinton, W. M.

W. M. Sinton, Planets and Satellites (University of Chicago Press, Chicago, 1961).

Stauffer, F.

H. Sakai and F. Stauffer, J. Opt. Soc. Am. 53, 507 (1963).

Tourin, R. H.

H. J. Babrov and R. H. Tourin, J. Quant. Spectry. Radiative Transfer 3, 17 (1963).

Williams, D.

D. E. Burch, D. Gryvanak, and D. Williams, AFCRL-255, Geophysics Research Directorate, Hanscom Field, Bedford, Massachusetts (1960).

J. N. Howard, D. E. Burch, and D. Williams, J. Opt. Soc. Am. 46, 186, 237, 242, 334, 452 (1956).

Other (22)

F. Paschen, Ann. Physik 50, 409 (1893).

C. P. Courtoy, Can. J. Phys. 5, 608 (1957).

W. M. Elsasser, Heat Transfer by Infrared Radiation in the Atmosphere (Harvard University Press, Cambridge, Massachusetts, 1942).

G. P. Kuiper, Astrophys. J. 106, 252 (1947).

W. M. Sinton, Planets and Satellites (University of Chicago Press, Chicago, 1961).

G. N. Plass, Ann. N. Y. Acad. Sci. 95, 61 (1961).

J. N. Howard, D. E. Burch, and D. Williams, J. Opt. Soc. Am. 46, 186, 237, 242, 334, 452 (1956).

H. J. Babrov and R. H. Tourin, J. Quant. Spectry. Radiative Transfer 3, 17 (1963).

G. J. Penzias, G. Jordan Maclay, and H. J. Babrov, NASA CR 1, "Final Report on Phase II of Contract NAS 3-1542," NASA Lewis Research Center, Cleveland, Ohio (1962).

D. E. Burch, D. Gryvanak, and D. Williams, AFCRL-255, Geophysics Research Directorate, Hanscom Field, Bedford, Massachusetts (1960).

D. E. Burch and D. Gryvnak, Technical Report, Contract Nonr 3560(00) (1962).

H. J. Babrov, J. Opt. Soc. Am. 51, 171 (1961).

H. Sakai, Johns Hopkins University, Laboratory for Astrophysics and Meteorology, Progress Report, Contract Nonr 248(58) (1962).

H. Sakai and F. Stauffer, J. Opt. Soc. Am. 53, 507 (1963).

L. D. Kaplan and D. Eggers, J. Chem. Phys. 25, 876 (1956).

R. Ladenburg and F. Reiche, Ann. Physik 42, 181 (1913).

W. S. Benedict, R. Herman, G. E. Moore, and S. Silverman, Can. J. Phys. 34, 830 (1956).

W. S. Benedict (private communication, 1963).

R. H. Schwendeman and V. W. Laurie, Tables of Line Strengths for Rotational Transitions of Asymmetric Rotor Molecules (Pergamon Press, Inc., New York, 1958).

W. S. Benedict and L. D. Kaplan, J. Chem. Phys. 30, 388 (1959).

U. P. Oppenheim and Y. Ben-Aryeh, J. Opt. Soc. Am. 53, 344 (1963).

G. N. Plass, J. Opt. Soc. Am. 48, 690 (1958).

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