Extraction of Quasi-Monochromatic Gravity Waves from an Airglow Imager Network
Alternative TitleWOS:000551174000001;20202708889210
Lai, Chang1; Li, Wei; Xu, Jiyao1; Liu, Xiao2; Yuan, Wei1; Yue, Jia3,4; Li, Qinzeng1
Source PublicationATMOSPHERE
Keywordgravity waves discrete wavelet transform quasi-monochromatic extraction band-pass filter NIGHTGLOW MOMENTUM
AbstractAn 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 BySCI ; EI
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Affiliation1.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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