A Comparison of Algorithms for Extracting Wind Direction from the Monostatic HF Radar Sea Echoes

Chu, Xiaoliang; Zhang, Jie; Wang, Shuyao; Ji, Yonggang; Wang, Yiming

doi:10.2991/esac-15.2015.29

Cited by 4 publications

(12 citation statements)

References 13 publications

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“…After examining the types of Cyclidia pitimani and Cyclidia sericea , and studying the descriptions and figures of the two species (Moore 1886, Warren 1922, Holloway 1998, Chen 2011), we found that the specimens from Yunnan which were identified as Cyclidia sericea by Chu and Wang (1987, 1991) well agree with Cyclidia pitimani . Thus, Cyclidia sericea in Chu and Wang (1987, 1991) is considered to be a misidentification of Cyclidia pitimani .…”

Section: Resultsmentioning

confidence: 90%

“…However, Cyclidia substigmaria also has been recorded from Malvaceae ( Hibiscus cannabinus L.) (Chu 1981, Chu and Wang 1987, 1991, Kadoorie Farm and Botanical Garden 2004). The morphology of the eggs, larva, pupa and life history of Cyclidia substigmaria were described in detail by Zhou and Wang (1985), Chu and Wang (1991) and Yan et al (2009).…”

Section: Resultsmentioning

confidence: 99%

“…Thus, Cyclidia sericea in Chu and Wang (1987, 1991) is considered to be a misidentification of Cyclidia pitimani .…”

Section: Resultsmentioning

confidence: 99%

“…This subfamily was first proposed as Eucherinae by Strand (1911) based on the genus Euchera Hübner, 1825. Later, it was treated as a separate family (Inoue 1962), followed by other authors (Fletcher 1979, Chu and Wang (1987, 1991) (Yan et al 2009). However, Minet (1983) regarded Cyclidiinae as a subfamily of Drepanidae, based on the study of the tympanal organs.…”

Section: Introductionmentioning

confidence: 99%

“…Up to the present, two genera ( Cyclidia Guenée, 1858 and Mimozethes Warren, 1901) have been recognized in Cyclidiinae. Ten species and eight subspecies are included in Cyclidia , with six species and four subspecies ( Cyclidia substigmaria substigmaria (Hübner, 1831), Cyclidia substigmaria brunna Chu & Wang, 1987, Cyclidia substigmaria intermedia Prout, 1918, Cyclidia tetraspota Chu & Wang, 1987, Cyclidia rectificata rectificata (Walker, 1862a), Cyclidia fractifasciata (Leech, 1898), Cyclidia sericea Warren, 1922, Cyclidia orciferaria Walker, 1860) recorded in China (Moore 1886, Aurivillius 1894, Swinhoe 1899, Strand 1911, Warren 1914, Bryk 1943, Inoue 1962, Chu and Wang 1991, Chang 1989, Holloway 1998, Lutz and Kobes 2002). Three species are included in Mimozethes , with two species recorded in China, Mimozethes lilacinaria (Leech, 1897) and Mimozethes angula Chu & Wang, 1987.…”

Section: Introductionmentioning

confidence: 99%

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A review of Cyclidiinae from China (Lepidoptera, Drepanidae)

Jiang¹,

Liu²,

Xue³

et al. 2016

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The subfamily Cyclidiinae from China is reviewed: two genera and seven species are reported from China. One new subspecies, Cyclidia fractifasciata indistincta subsp. n., is described. Two new synonyms are established: Cyclidia substigmaria (Hübner, 1831) (= Cyclidia substigmaria brunna Chu & Wang, 1987, syn. n. = Cyclidia tetraspota Chu & Wang, 1987, syn. n.). One misidentification in Chu & Wang (1987) is corrected. Identification keys and diagnoses for all discussed Chinese species are provided. External features and genitalia are depicted. In addition, results of DNA barcoding for five taxa of Cyclidia are briefly discussed.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

“…Thus, Cyclidia sericea in Chu and Wang (1987, 1991) is considered to be a misidentification of Cyclidia pitimani .…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A review of Cyclidiinae from China (Lepidoptera, Drepanidae)

Jiang¹,

Liu²,

Xue³

et al. 2016

View full text Add to dashboard Cite

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Extraction of wind direction from the HF hybrid sky-surface wave radar sea echoes

Chu

Zhang

et al. 2018

IEEE Aerosp. Electron. Syst. Mag.

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Wind Direction Inversion from Narrow-Beam HF Radar Backscatter Signals in Low and High Wind Conditions at Different Radar Frequencies

Shen

Gurgel

2018

Remote Sensing

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Land-based, high-frequency (HF) surface wave radar has the unique capability of monitoring coastal surface parameters, such as current, waves, and wind, up to 200 km off the coast. The Doppler spectrum of the backscattered radar signal is characterized by two strong peaks that are caused by the Bragg-resonant scattering from the ocean surface. The wavelength of Bragg resonant waves is exactly half the radio wavelength (grazing incidence), and these waves are located at the higher frequency part of the wave spectral distribution. When HF radar operates at higher frequencies, the resonant waves are relatively shorter waves, which are more sensitive to a change in wind direction, and they rapidly respond to local wind excitation and a change in wind direction. When the radar operates at lower frequencies, the corresponding resonant waves are relatively longer and take longer time to respond to a change in wind direction due to the progress of wave growth from short waves to long waves. For the wind inversion from HF radar backscatter signals, the accuracy of wind measurement is also relevant to radar frequency. In this paper, a pattern-fitting method for extracting wind direction by estimating the wave spreading parameter is presented, and a comparison of the pattern-fitting method and a conventional method is given as well, which concludes that the pattern-fitting method presents better results than the conventional method. In order to analyze the wind direction inversion from radar backscatter signals under different wind conditions and at different radar frequencies, two radar experiments accomplished in Norway and Italy are introduced, and the results of wind direction inversion are presented. In the two experiments, the radar worked at 27.68 MHz and 12 MHz, respectively, and the wind conditions at the sea surface were quite different. In the experiment in Norway, 67.4% of the wind records were higher than 5 m/s, while, in the experiment in Italy, only 18.9% of the wind records were higher than 5 m/s. All these factors affect the accuracy of wind direction inversion. The paper analyzes the radar data and draws a conclusion on the influencing factor of wind direction inversion.

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A Comparison of Algorithms for Extracting Wind Direction from the Monostatic HF Radar Sea Echoes

Cited by 4 publications

References 13 publications

A review of Cyclidiinae from China (Lepidoptera, Drepanidae)

A review of Cyclidiinae from China (Lepidoptera, Drepanidae)

Extraction of wind direction from the HF hybrid sky-surface wave radar sea echoes

Wind Direction Inversion from Narrow-Beam HF Radar Backscatter Signals in Low and High Wind Conditions at Different Radar Frequencies

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