Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique
An improved resonant fluorescence instrument for measuring atomic oxygen concentration was developed to avoid the Doppler effect and the aerodynamic shock effect due to the supersonic motion of a rocket. The shock effect is reduced by adopting a sharp wedge-shaped housing and by scanning of the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1996-02-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/14/227/1996/angeo-14-227-1996.pdf |
| _version_ | 1818260370444255232 |
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| author | K. Kita T. Imamura N. Iwagami W. H. Morrow T. Ogawa |
| author_facet | K. Kita T. Imamura N. Iwagami W. H. Morrow T. Ogawa |
| author_sort | K. Kita |
| collection | DOAJ |
| description | An improved resonant fluorescence instrument
for measuring atomic oxygen concentration was developed to avoid the Doppler
effect and the aerodynamic shock effect due to the supersonic motion of a
rocket. The shock effect is reduced by adopting a sharp wedge-shaped housing and
by scanning of the detector field of view to change the distance between the
scattering volume and the surface of the housing. The scanning enables us to
determine absolute values of atomic oxygen concentration from relative variation
of the scattered light signal due to the self-absorption. The instrument was
calibrated in the laboratory, and the numerical simulation reproduced the
calibration result. Using the instrument, the altitude profile of atomic oxygen
concentration was observed by a rocket experiment at Uchinoura (31°N) on 28
January 1992. The data obtained from the rocket experiment were not perfectly
free from the shock effect, but errors due to the effect were reduced by the
data analysis procedure. The observed maximum concentration was 3.8× 10<sup>11</sup>
cm<sup>–3</sup> at altitudes around 94 km. The systematic error is estimated to
be less than ±0.7×10<sup>11</sup> cm<sup>–3</sup> and the relative random
error is less than±0.07× 10<sup>11</sup> cm<sup>–3</sup>at the same altitudes.
The altitude profile of the OI 557.7-nm airglow was also observed in the same
rocket experiment. The maximum volume emission rate was found to be 150 photons
cm<sup>–3</sup> s<sup>–1</sup> at 94 km. The observed altitude profiles are
compared with the MSIS model and other in situ observations. |
| first_indexed | 2024-12-12T18:30:15Z |
| format | Article |
| id | doaj.art-2df4ebf1d3c44d15b964680f9e999b4d |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-12T18:30:15Z |
| publishDate | 1996-02-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-2df4ebf1d3c44d15b964680f9e999b4d2022-12-22T00:15:57ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761996-02-011422723710.1007/s00585-996-0227-zRocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence techniqueK. KitaT. ImamuraN. IwagamiW. H. MorrowT. OgawaAn improved resonant fluorescence instrument for measuring atomic oxygen concentration was developed to avoid the Doppler effect and the aerodynamic shock effect due to the supersonic motion of a rocket. The shock effect is reduced by adopting a sharp wedge-shaped housing and by scanning of the detector field of view to change the distance between the scattering volume and the surface of the housing. The scanning enables us to determine absolute values of atomic oxygen concentration from relative variation of the scattered light signal due to the self-absorption. The instrument was calibrated in the laboratory, and the numerical simulation reproduced the calibration result. Using the instrument, the altitude profile of atomic oxygen concentration was observed by a rocket experiment at Uchinoura (31°N) on 28 January 1992. The data obtained from the rocket experiment were not perfectly free from the shock effect, but errors due to the effect were reduced by the data analysis procedure. The observed maximum concentration was 3.8× 10<sup>11</sup> cm<sup>–3</sup> at altitudes around 94 km. The systematic error is estimated to be less than ±0.7×10<sup>11</sup> cm<sup>–3</sup> and the relative random error is less than±0.07× 10<sup>11</sup> cm<sup>–3</sup>at the same altitudes. The altitude profile of the OI 557.7-nm airglow was also observed in the same rocket experiment. The maximum volume emission rate was found to be 150 photons cm<sup>–3</sup> s<sup>–1</sup> at 94 km. The observed altitude profiles are compared with the MSIS model and other in situ observations.https://www.ann-geophys.net/14/227/1996/angeo-14-227-1996.pdf |
| spellingShingle | K. Kita T. Imamura N. Iwagami W. H. Morrow T. Ogawa Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique Annales Geophysicae |
| title | Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique |
| title_full | Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique |
| title_fullStr | Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique |
| title_full_unstemmed | Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique |
| title_short | Rocket observation of atomic oxygen and night airglow: Measurement of concentration with an improved resonance fluorescence technique |
| title_sort | rocket observation of atomic oxygen and night airglow measurement of concentration with an improved resonance fluorescence technique |
| url | https://www.ann-geophys.net/14/227/1996/angeo-14-227-1996.pdf |
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