| タイトル | A theoretical study of a two-wavelength lidar technique for the measurement of atmospheric temperature profiles |
| 著者（英） | Weng, C. Y.; Korb, C. L. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1982-09-01 |
| 言語 | eng |
| 内容記述 | The theory of differential absorption lidar measurements for lines with a Voigt profile is given and applied to a two-wavelength technique for measuring the atmospheric temperature profile using a high J line in the oxygen A band. Explicit expressions for the temperature and pressure dependence of the absorption coefficient are developed for lines with a Voigt profile. An iteration procedure for calculating the temperature for narrow laser bandwidths is described which has an accuracy better than 0.2 K for bandwidths less than 0.01/cm. To reduce the errors in lidar measurements due to uncertainties in pressure, a method for estimating the pressure from the temperature profile is described. A procedure for extending the differential absorption technique to the case of finite laser bandwidth with good accuracy is also described. Simulation results show that a knowledge of the laser frequency is needed to 0.005/cm for accurate temperature measurements. Evaluation of the sensitivity for both ground- and Shuttle-based measurements shows accuracies generally better than 1 K. This technique allows up to an order of magnitude improvement in sensitivity compared to other differential absorption lidar techniques. |
| NASA分類 | METEOROLOGY AND CLIMATOLOGY |
| レポートNO | 82A47429 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/408640 |
