محبوبترین نویسندگان :
نویسندگان مقالات پربازدید :
مجله هیدرودینامیک
جزئیات رویداد
اینستاگرام تی پی بین
همایش ، رویداد ، ژورنال
حوزه های تحت پوشش رویداد

  • application of two-dimensional wavelet transform in near-shore x-band radar images

    نویسندگان :
    کلمات کلیدی :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 513
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     among existing remote sensing applications, land-based x-band radar is an effective technique to monitor the wave fields, and spatial wave information could be obtained from the radar images. two-dimensional fourier transform (2-d ft) is the common algorithm to derive the spectra of radar images. however, the wave field in the nearshore area is highly non-homogeneous due to wave refraction, shoaling, and other coastal mechanisms. when applied in nearshore radar images, 2-d ft would lead to ambiguity of wave characteristics in wave number domain. in this article, we introduce two-dimensional wavelet transform (2-d wt) to capture the non-homogeneity of wave fields from nearshore radar images. the results show that wave number spectra by 2-d wt at six parallel space locations in the given image clearly present the shoaling of nearshore waves. wave number of the peak wave energy is increasing along the inshore direction, and dominant direction of the spectra changes from south south west (ssw) to west south west (wsw). to verify the results of 2-d wt, wave shoaling in radar images is calculated based on dispersion relation. the theoretical calculation results agree with the results of 2-d wt on the whole. the encouraging performance of 2-d wt indicates its strong capability of revealing the non-homogeneity of wave fields in nearshore x-band radar images.

سوال خود را در مورد این مقاله مطرح نمایید :

با انتخاب دکمه ثبت پرسش، موافقت خود را با قوانین انتشار محتوا در وبسایت تی پی بین اعلام می کنم
مقالات جدیدترین رویدادها
مقالات جدیدترین ژورنال ها