A new model for the profiles of optical turbulence outer scale and C-n(2) on the coast
文献类型：期刊论文
| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2018 |
| 卷号 | 67 |
| 关键词 | coast turbulence profile parameterization outer scale |
| ISSN号 | 1000-3290 |
| 其他题名 | A new model for the profiles of optical turbulence outer scale and C_n~2 on the coast |
| 英文摘要 | Atmospheric optical turbulence severely restricts the performances of electro-optical systems. The turbulent atmosphere causes the intensity of a light beam to fluctuate or scintillate, leads the light beam to wander and makes the images randomly displace, which directly relates to the refractive index structure parameter C-n(2). Therefore the knowledge of C-n(2) is essential to evaluate and to predict the effects of optical turbulence on electro-optical imagery systems. During the period from December 13, 2016 to January 2, 2017, 30 sets of sounding data, which include temperatures, humidities, pressures, wind speeds, wind directions and atmospheric refractive index structure parameters, are obtained by using a self-developed meteorological radiosonde for turbulence at Marine Meteorological Science Experiment Base at Bohe of Maoming. On the basis of the HMNSP99 outer scale model, an atmospheric optical turbulence outer scale formula of Maoming is obtained by fitting the sounding data. At the same time, the experimental data of the turbulence profiles are statistically averaged, and then based on the Hufnagel-Valley model, a statistical model is obtained, which is appropriate to the variation of the turbulence profile on the coast. According to Tatarski turbulence parameterization and the Maoming outer scale formula, the new estimated C-n(2) values are compared with their experimental observations and the results from other already defined models, respectively. Statistical analysis shows that the overall correlation coefficients of log(10)(C-n(2)) between observed values and estimated values by using the new fitting Maoming outer scale formula, the HMNSP99 model, the Dewan model and the Coulman model are 0.924, 0.848, 0.763 and 0.651, respectively. Also, both the trends and magnitudes for these four outer scale models are consistent with each other. The errors of the above four outer scale models are very small: their overall average absolute errors and average relative errors are 0.514 and 2.963%, 0.627 and 3.612%, 0.943 and 5.439%, 0.766 and 4.417%, respectively, and the error of the Maoming outer scale model is smallest. The reliabilities and validities of the new outer scale and C-n(2) models are further verified. In addition, it is found that the occurrence of upper air optical turbulence is closely related to wind shear and temperature gradient. The results support the prediction of the atmospheric optical turbulence profile required for electro-optical engineering on the coast. |
| 资助项目 | [National Natural Science Foundation of China] ; [Science and Technology Innovation Foundation of the Chinese Academy of Sciences, China] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6192281 |
| 源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/70113]  |
| 专题 | 中国科学院合肥物质科学研究院 |
| 推荐引用方式 GB/T 7714 | . A new model for the profiles of optical turbulence outer scale and C-n(2) on the coast[J]. ACTA PHYSICA SINICA,2018,67. |
| APA | (2018).A new model for the profiles of optical turbulence outer scale and C-n(2) on the coast.ACTA PHYSICA SINICA,67. |
| MLA | "A new model for the profiles of optical turbulence outer scale and C-n(2) on the coast".ACTA PHYSICA SINICA 67(2018). |
入库方式： OAI收割
来源：合肥物质科学研究院
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