Abstract

By measuring the mean shifts of hundreds of lines in solar occultation spectra obtained at satellite altitudes, relative wind speeds along the lines of sight of the rays can be obtained with precisions of 5 m/sec or better at altitudes up to 100 km. It is necessary to obtain more accurate line positions or to introduce a gas sample for frequency calibration if absolute wind speeds are to be obtained.

© 1985 Optical Society of America

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References

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  1. D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
    [CrossRef]
  2. P. B. Hays, “High-Resolution Optical Measurements of Atmospheric Winds from Space. 1: Lower Atmosphere Molecular Absorption,” Appl. Opt. 21, 1136 (1982).
    [CrossRef] [PubMed]
  3. D. J. McCleese, J. S. Margolis, “Remote Sensing of Stratospheric and Mesopheric Winds by Gas Correlation Electrooptic Phase-Modulation Spectroscopy,” Appl. Opt. 22, 2528 (1983).
    [CrossRef] [PubMed]
  4. R. H. Norton, R. Beer, “New Apodizing Functions for Fourier Spectrometry,” J. Opt. Soc. Am. 66, 259 (1976).
    [CrossRef]
  5. R. L. Hawkins, M. L. Hoke, J. H. Shaw, “Wavenumber Calibration of Fourier Transform Spectra,” Appl. Spectrosc. 37, 134 (1983).
    [CrossRef]
  6. L. R. Brown, R. A. Toth, “Comparison of the Frequencies of NH3, CO2, H2O, N2O, CO, and CH4 as Infrared Calibration Standards,” J. Opt. Soc. Am. B 2, 842 (1985).
    [CrossRef]
  7. R. Beer, “Tropospheric Remote Sensing,” Opt. News 10, 45 (1984).
    [CrossRef]

1985

1984

R. Beer, “Tropospheric Remote Sensing,” Opt. News 10, 45 (1984).
[CrossRef]

1983

1982

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

P. B. Hays, “High-Resolution Optical Measurements of Atmospheric Winds from Space. 1: Lower Atmosphere Molecular Absorption,” Appl. Opt. 21, 1136 (1982).
[CrossRef] [PubMed]

1976

Beer, R.

Brown, L. R.

Greenaway, A. H.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

Hawkins, R. L.

Hays, P. B.

Hoke, M. L.

Margolis, J. S.

McCleese, D. J.

McWhirter, I.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

Norton, R. H.

Rees, D.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

Rounce, P. A.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

Scott, A. F. D.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

Shaw, J. H.

Toth, R. A.

Towlson, W.

D. Rees, P. A. Rounce, I. McWhirter, A. F. D. Scott, A. H. Greenaway, W. Towlson, “Observations of Atmospheric Absorption Lines from a Stabilized Balloon Platform and Measurements of Stratospheric Winds,” J. Phys. E. 15, 191 (1982).
[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Absorption by CO2 in a simulated occultation spectrum with a resolution of 0.01 cm−1 and a tangent height of 85 km.

Fig. 2
Fig. 2

Simulated spectra of a line of a gas with a constant vertical mixing ratio observed with a resolution of 0.015 cm−1 and tangent heights of 43, 47, 51, and 55 km.

Fig. 3
Fig. 3

Dependence of the peak absorptance of lines of a gas with a constant vertical mixing ratio on tangent height. These values were obtained from simulated spectra with a resolution of 0.015 cm−1, and the intensities of the lines change by a factor of 10 in successive curves. The topmost curve corresponds to one of the stronger lines of CO2 near 15 μm.

Tables (2)

Tables Icon

Table I Range of Doppler Widths of Lines of Atmospheric Molecules Between 0 and 100 km

Tables Icon

Table II Wind-Induced Doppler Shifts and the Numbers of Line Positions Required to Measure 5-m/sec Winds

Equations (8)

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Δ ν / ν = υ / c .
Δ ν 1 = ν 1 ν 0 , = υ 1 ν 0 / c ,
Δ ν 2 = ν 2 ν 0 , = υ 2 ν 0 / c .
δ ν 2 ( Δ u 1 υ 1 + Δ u 2 υ 2 ) ν 0 / ( Δ u 1 + Δ u 2 ) c .
δ ν n ( ν 0 / c ) i = 1 n Δ u i υ i / i = 1 n Δ u i .
δ ν n = ( ν 0 / c ) Δ u n υ n / u ,
u = i = 1 n Δ u i .
δ ν n / Δ ν n = Δ u n / u .

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