| タイトル | Latitudinal variation of thermospheric hydrogen near solstice from AE-D observations |
| 著者（英） | Sanatani, S.; Breig, E. L. |
| 著者所属（英） | Texas Univ. at Dallas |
| 発行日 | 1988-09-01 |
| 言語 | eng |
| 内容記述 | Variations of thermospheric neutral atomic hydrogen with latitude during a solstice season near solar minimum were investigated using data acquired with the polar-orbiting AE-D satellite. Hydrogen concentrations at low latitude were found to be comparable to those found from observations with the AE-E satellite, but were slightly higher than concentrations derived from the 1983 mass spectrometer incoherent scatter atmospheric model. Results confirm the general summer-to-winter density increase, large latitudinal gradients in the summer hemisphere, and the winter enhancement of hydrogen observed in AE-C nighttime measurements. The AE-D data, however, show a small polar depression in hydrogen concentration at high winter latitudes, attributed to atmospheric dynamics following auroral heating. The density gradients observed by AE-D in the summer hemisphere were in sharp contrast to the more constant horizontal daytime profiles reported from OGO-6 and previous AE-C measurements, indicating the possibility of local time effects. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 88A53459 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/368735 |
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