Zobrazeno 1 - 10
of 381
pro vyhledávání: '"Doppler centroid"'
Autor:
Anis Elyouncha, Roland Romeiser
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 17, Pp 13908-13924 (2024)
A challenging effect in the retrieval of ocean surface currents from synthetic aperture radar (SAR) is the so-called wave-induced Doppler velocity. This effect arises from the correlation between the modulation of the normalized radar cross section (
Externí odkaz:
https://doaj.org/article/12354e5418414707b1eca24e15062780
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 16, Pp 7614-7623 (2023)
The Doppler information in complement to the intensity of radar backscatter has been verified useful for ocean synthetic aperture radar (SAR) applications. An accurate estimate of the ocean surface motions requires an accurate estimate of the Doppler
Externí odkaz:
https://doaj.org/article/f76f30576797484194ad1da442eae236
Publikováno v:
Remote Sensing, Vol 16, Iss 12, p 2083 (2024)
Sea surface wind, waves, and currents are the three basic parameters that describe the dynamic process of sea surface, and they are coupled with each other. To more accurately describe large-scale ocean motion and extract the ocean dynamic parameters
Externí odkaz:
https://doaj.org/article/46124f065f29479b9ec5203ff6262de4
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 16, Pp 2178-2191 (2023)
The near-instantaneous radial velocity of a target can be obtained using the Doppler effect of synthetic aperture radar (SAR), which is widely used in ocean current retrieval. However, in sea ice drift velocity measurements, only a Doppler centroid e
Externí odkaz:
https://doaj.org/article/07499e54f501457caa1c5e60d6db144d
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 3, p 450 (2024)
Spaceborne synthetic aperture radar (SAR) has been proven to be a useful technique for observing the sea surface wind and current over the open ocean given its all-weather data-gathering capability and high spatial resolution. In addition to the comm
Externí odkaz:
https://doaj.org/article/d4e25f6ca7a3451fa158411745569e26
Publikováno v:
Remote Sensing, Vol 15, Iss 23, p 5541 (2023)
For a spaceborne pencil-beam rotating Doppler scatterometer, its precision in measuring the ocean surface motion depends on the Doppler centroid of the received signals. The Doppler centroid is determined by the relative motion between the scatterome
Externí odkaz:
https://doaj.org/article/ff3bc44be45d487e89f80da68eabec54
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 2425-2436 (2022)
This article presents the first direct comparison of the sea surface radial velocity (RVL) derived from the two satellite SAR systems Sentinel-1 and TanDEM-X, operating at different frequencies and imaging modes. The RVL is derived from the Doppler c
Externí odkaz:
https://doaj.org/article/33fb3eb5e53c489c95944927ddf94054
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 14, Pp 5072-5090 (2021)
In this article, an effective clutter suppression and moving target imaging approach is proposed for the geosynchronous-low earth orbit (GEO-LEO) bistatic multichannel synthetic aperture radar (SAR) system, which is robust for the fast moving target
Externí odkaz:
https://doaj.org/article/2aa464deda4146298f3ca70de8669b56
Publikováno v:
Remote Sensing, Vol 15, Iss 8, p 2074 (2023)
Nowadays, sea surface analysis and monitoring increasingly use remote sensing, with particular interest in Synthetic Aperture Radar (SAR). Several SAR techniques exist in literature to understand the marine phenomena affecting the sea surface. In thi
Externí odkaz:
https://doaj.org/article/9ef19499f7e34aa2912d2c5d3b5c9cea
Publikováno v:
Leida xuebao, Vol 8, Iss 3, Pp 391-399 (2019)
Doppler center shift is an important parameter for Synthetic Aperture Radar(SAR) to retrieve ocean surface wind field and ocean surface current field. We present a calculation method of Doppler centroid shift for airborne side-looking SAR. We compute
Externí odkaz:
https://doaj.org/article/40617a880f824b44955b39e780caa062