Abstract

An investigation has been made of the degree to which the invariance of the relative dispersion of the atmosphere will permit an interferometric separation between geometric path differences and path differences due to atmospheric inhomogeneities. Humidity variations are the most serious. A difference in average humidity of 1% of saturation at 15°C would affect the comparison of two paths by approximately 2 parts in 10<sup>8</sup>. The feasibility of photographing interference for long paths through an uncontrolled atmosphere has been investigated. Photographs of channel spectrum interference have been readily obtained for path lengths of 115 m near ground level.

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  1. Y. Väisälä, Veröff. Finn. Geod. Inst. No. 2 (1923); No. 14 (1930); No. 47 (1955). See also No. 37 by T. Honkasalo.
  2. N. Watanabe, Trav. Assn. Int. de Geod. 13, 2 (1936).
  3. N. Watanabe, K. Muraoka, and K. Kitada, J. Geod. Soc. Japan 4, No. 3, 76 (1958) and No. 4, 97 (1958).
  4. F. Müfhlig, Veröff. Geod. Inst. Potsdam (1949).
  5. K. E. Erickson, J. Opt. Soc. Am. 52, 777 (1962).
  6. K. E. Erickson, dissertation, The Johns Hopkins University (1961).
  7. Bengt Edlén, J. Opt. Soc. Am. 43, 339 (1953).
  8. Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).
  9. N. K. Johnson, Geophys. Mem. 46 (1929).
  10. E. Inoue, On the Smallest Scale Turbulence in the Atmosphere (The A. M. College of Texas, Department of Oceanography, 54-21T, 1954).
  11. V. I. Tatarski, Wave Propagation in a Turbulent Medium (McGraw-Hill Book Company, New York, 1960), p. 210.
  12. J. A. Fejer, Proc. Roy. Soc. (London) A220, 455 (1953).
  13. See reference 11, Chap. 7. In Soviet Phys.—Acoustics 6, 81 (1960), V. Pisareva has questioned the validity of formulas for rms phase fluctuations based on the method of "smooth" perturbations (used by Tatarski and others) for the case where these fluctuations are not much smaller than unity. Investigations in the optical region might therefore be useful.
  14. A. A. Michelson and G. Hale, Astrophys. J. 61, 137 (1925).
  15. K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).
  16. For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

Brown, W. F.

For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

Edlén, Bengt

Bengt Edlén, J. Opt. Soc. Am. 43, 339 (1953).

Erickson, K. E.

K. E. Erickson, J. Opt. Soc. Am. 52, 777 (1962).

K. E. Erickson, dissertation, The Johns Hopkins University (1961).

Fejer, J. A.

J. A. Fejer, Proc. Roy. Soc. (London) A220, 455 (1953).

Hale, G.

A. A. Michelson and G. Hale, Astrophys. J. 61, 137 (1925).

Inoue, E.

E. Inoue, On the Smallest Scale Turbulence in the Atmosphere (The A. M. College of Texas, Department of Oceanography, 54-21T, 1954).

Johnson, N. K.

N. K. Johnson, Geophys. Mem. 46 (1929).

Kitada, K.

N. Watanabe, K. Muraoka, and K. Kitada, J. Geod. Soc. Japan 4, No. 3, 76 (1958) and No. 4, 97 (1958).

Michelson, A. A.

A. A. Michelson and G. Hale, Astrophys. J. 61, 137 (1925).

Müfhlig, F.

F. Müfhlig, Veröff. Geod. Inst. Potsdam (1949).

Muraoka, K.

N. Watanabe, K. Muraoka, and K. Kitada, J. Geod. Soc. Japan 4, No. 3, 76 (1958) and No. 4, 97 (1958).

Newbound, K. B.

K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).

Svensson, Karl-Filip

Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).

Tatarski, V. I.

V. I. Tatarski, Wave Propagation in a Turbulent Medium (McGraw-Hill Book Company, New York, 1960), p. 210.

Väisälä, Y.

Y. Väisälä, Veröff. Finn. Geod. Inst. No. 2 (1923); No. 14 (1930); No. 47 (1955). See also No. 37 by T. Honkasalo.

Watanabe, N.

N. Watanabe, Trav. Assn. Int. de Geod. 13, 2 (1936).

N. Watanabe, K. Muraoka, and K. Kitada, J. Geod. Soc. Japan 4, No. 3, 76 (1958) and No. 4, 97 (1958).

Other (16)

Y. Väisälä, Veröff. Finn. Geod. Inst. No. 2 (1923); No. 14 (1930); No. 47 (1955). See also No. 37 by T. Honkasalo.

N. Watanabe, Trav. Assn. Int. de Geod. 13, 2 (1936).

N. Watanabe, K. Muraoka, and K. Kitada, J. Geod. Soc. Japan 4, No. 3, 76 (1958) and No. 4, 97 (1958).

F. Müfhlig, Veröff. Geod. Inst. Potsdam (1949).

K. E. Erickson, J. Opt. Soc. Am. 52, 777 (1962).

K. E. Erickson, dissertation, The Johns Hopkins University (1961).

Bengt Edlén, J. Opt. Soc. Am. 43, 339 (1953).

Karl-Filip Svensson, Arkiv Fysik 16, 361 (1960).

N. K. Johnson, Geophys. Mem. 46 (1929).

E. Inoue, On the Smallest Scale Turbulence in the Atmosphere (The A. M. College of Texas, Department of Oceanography, 54-21T, 1954).

V. I. Tatarski, Wave Propagation in a Turbulent Medium (McGraw-Hill Book Company, New York, 1960), p. 210.

J. A. Fejer, Proc. Roy. Soc. (London) A220, 455 (1953).

See reference 11, Chap. 7. In Soviet Phys.—Acoustics 6, 81 (1960), V. Pisareva has questioned the validity of formulas for rms phase fluctuations based on the method of "smooth" perturbations (used by Tatarski and others) for the case where these fluctuations are not much smaller than unity. Investigations in the optical region might therefore be useful.

A. A. Michelson and G. Hale, Astrophys. J. 61, 137 (1925).

K. B. Newbound, J. Opt. Soc. Am. 39, 835 (1949).

For a discussion of other effects see W. F. Brown, Dielectrics, volume 17 of Handbook of Physics (Springer-Verlag, Berlin, 1956).

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