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Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network | |
Alternative Title | WOS:000551174000001;20202708889210 |
Lai, Chang1; Li, Wei; Xu, Jiyao1; Liu, Xiao2; Yuan, Wei1; Yue, Jia3,4; Li, Qinzeng1 | |
Source Publication | ATMOSPHERE
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2020 | |
Volume | 11Issue:6Pages:615 |
DOI | 10.3390/atmos11060615 |
Language | 英语 |
Keyword | gravity waves discrete wavelet transform quasi-monochromatic extraction band-pass filter NIGHTGLOW MOMENTUM |
Abstract | An algorithm has been developed to isolate the gravity waves (GWs) of different scales from airglow images. Based on the discrete wavelet transform, the images are decomposed and then reconstructed in a series of mutually orthogonal spaces, each of which takes a Daubechies (db) wavelet of a certain scale as a basis vector. The GWs in the original airglow image are stripped to the peeled image reconstructed in each space, and the scale of wave patterns in a peeled image corresponds to the scale of the db wavelet as a basis vector. In each reconstructed image, the extracted GW is quasi-monochromatic. An adaptive band-pass filter is applied to enhance the GW structures. From an ensembled airglow image with a coverage of 2100 km x 1200 km using an all-sky airglow imager (ASAI) network, the quasi-monochromatic wave patterns are extracted using this algorithm. GWs range from ripples with short wavelength of 20 km to medium-scale GWs with a wavelength of 590 km. The images are denoised, and the propagating characteristics of GWs with different wavelengths are derived separately. |
Indexed By | SCI ; EI |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.nssc.ac.cn/handle/122/7671 |
Collection | 中国科学院国家空间科学中心 |
Affiliation | 1.Chongqing Univ Posts & Telecommun, Sch Sci, Chongqing 400062, Peoples R China 2.Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 110000, Peoples R China 3.Henan Normal Univ, Coll Math & Informat Sci, Xinxiang 410700, Henan, Peoples R China 4.Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA 5.NASA, Goddard Space Flight Ctr, Code 916, Greenbelt, MD 20771 USA |
Recommended Citation GB/T 7714 | Lai, Chang,Li, Wei,Xu, Jiyao,et al. Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network[J]. ATMOSPHERE,2020,11(6):615. |
APA | Lai, Chang.,Li, Wei.,Xu, Jiyao.,Liu, Xiao.,Yuan, Wei.,...&Li, Qinzeng.(2020).Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network.ATMOSPHERE,11(6),615. |
MLA | Lai, Chang,et al."Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network".ATMOSPHERE 11.6(2020):615. |
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