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Author |
Rothermel, H.; Käufl, H. U.; Schrey, U.; Drapatz, S. |
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Title |
Thermal structure of the Martian mesosphere |
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Journal Article |
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Year |
1988 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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Volume |
196 |
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Pages |
296-300 |
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Keywords |
atmospheric temperature, carbon dioxide, infrared spectroscopy, mars atmosphere, mesosphere, emission spectra, line spectra, spatial resolution, mars, atmosphere, mesosphere, structure, thermal properties, spectra, spectroscopy, earth-based observations, temperature, patterns, infrared, polar regions, wavelengths, equipment, procedure, carbon dioxide, emissions |
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Call Number |
Rothermel1988 |
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450 |
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Author |
Thiébeau, C.; Courtois, D.; Delahaigue, A.; Corre, H.; Mouanda, J. C.; Fayt, A. |
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Title |
Dual-beam laser heterodyne spectrometer: Ethylene absorption spectrum in the 10 μm range |
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Journal Article |
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Year |
1988 |
Publication |
Applied Physics B: Photophysics and Laser Chemistry |
Abbreviated Journal |
Appl. Phys. B |
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Volume |
47 |
Issue |
4 |
Pages |
313-318 |
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Keywords |
infrared applications |
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0721-7269 |
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493 |
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Author |
Käufl, H. U.; Rothermal, H.; Drapatz, S. |
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Title |
Investigation of the Martian atmosphere by 10 micron heterodyne spectroscopy |
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Journal Article |
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Year |
1984 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
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Volume |
136 |
Issue |
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Pages |
319-325 |
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Keywords |
astronomical spectroscopy, atmospheric composition, infrared astronomy, mars atmosphere, spectral line width, carbon dioxide concentration, nonequilibrium thermodynamics, optical heterodyning, planetary radiation, mars, atmosphere, spectroscopy, atmosphere, carbon dioxide, altitude, kinetics, rotation, thermal properties, temperature, emissions, intensity, models, data, spectra |
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449 |
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Author |
Rothermel, H.; Käufl, H. U.; Yu, Y. |
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Title |
A heterodyne spectrometer for astronomical measurements at 10 micrometers |
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Year |
1983 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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Volume |
126 |
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387-392 |
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astronomical spectroscopy, infrared astronomy, infrared spectrometers, optical heterodyning, infrared telescopes, laser spectrometers, mars (planet), venus (planet) |
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453 |
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Author |
Soifer, B. T.; Pipher, J. L. |
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Title |
Instrumentation for infrared astronomy |
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Journal Article |
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Year |
1978 |
Publication |
Annual Rev. Astron. Astrophys. |
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Volume |
16 |
Issue |
1 |
Pages |
335-369 |
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Keywords |
infrared applications |
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0066-4146 |
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492 |
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Author |
Johnson, M. A.; Betz, A. L.; McLaren, R. A.; Townes, C. H.; Sutton, E. C. |
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Title |
Nonthermal 10 micron CO2 emission lines in the atmospheres of Mars and Venus |
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Journal Article |
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Year |
1976 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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Volume |
208 |
Issue |
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Pages |
145 |
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Keywords |
carbon dioxide, emission spectra, infrared spectra, mars atmosphere, nonthermal radiation, optical heterodyning, planetary radiation, venus atmosphere, absorption spectra, energy transfer, line spectra, molecular absorption, molecular collisions, near infrared radiation, solar flux |
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ref1976ApJ...208L.145J |
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451 |
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Author |
Betz, A. L.; Johnson, M. A.; McLaren, R. A.; Sutton, E. C. |
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Title |
Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus |
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Journal Article |
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Year |
1976 |
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Astrophys. J. |
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Volume |
208 |
Issue |
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Pages |
L141-L144 |
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Keywords |
carbon dioxide, emission spectra, optical heterodyning, planetary radiation, venus atmosphere, wind velocity, doppler effect, infrared radiation, ultraviolet radiation, venus clouds |
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455 |
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Author |
Teich, M. C. |
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Title |
Infrared heterodyne detection |
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Conference Article |
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Year |
1968 |
Publication |
Proc. IEEE |
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Volume |
56 |
Issue |
1 |
Pages |
37-46 |
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Keywords |
minimum detectable power, quantum limit, infrared, IR mixer |
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Abstract |
Heterodyne experiments have been performed in the middle infrared region of the electromagnetic spectrum using the CO2laser as a radiation source. Theoretically optimum operation has been achieved at kHz heterodyne frequencies using photoconductive Ge:Cu detectors operated at 4°K, and at kHz and MHz frequencies using Pb1-xSnxSe photovoltaic detectors at 77°K. In accordance with the theory, the minimum detectable power observed is a factor of 2/η greater than the theoretically perfect quantum counter, hvΔf. The coefficient 2/η varies from 5 to 25 for the detectors investigated in this study. A comparison is made between photoconductive and photodiode detectors for heterodyne use in the infrared, and it is concluded that both are useful. Heterodyne detection at 10.6 µm is expected to be useful for communications applications, infrared radar, and heterodyne spectroscopy. It has particular significance because of the high radiation power available from the CO2laser, and because of the 8 to 14 µm atmospheric window. |
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IEEE |
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0018-9219 |
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1060 |
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