کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8866454 | 1621184 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous ocean surface current and wind vectors retrieval with squinted SAR interferometry: Geophysical inversion and performance assessment
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
کامپیوتر در علوم زمین
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Using the baseline two-look instrument configuration and realistic instrument noise figures (radiometric resolution: kp = 5 and 12%; Îdf = 2 and 5â¯Hz), the root-mean square errors (RMSE) of the retrieved current and wind vectors are typically better than [0.1â¯m/s, 10°] for current and [0.5â¯m/s, 5°] for wind. This inversion setup yields four ambiguous solutions within a current range of â¼1â¯m/s. The addition of dual polarization (VV, HH) capability helps to discriminate these ambiguities. The retrieval performance depends weakly on geophysical parameters such as wind speed, current velocity or current direction, but is sensitive to wind direction because of its strong effect on current retrieval through the wind-wave induced artifact surface velocity (WASV). Larger retrieval errors are obtained when the wind is aligned with one of the antenna line-of-sight (LoS) directions, although errors remain typically below [0.2â¯m/s, 25°] for current and [0.5â¯m/s, 15°] for wind. Improving the retrieval performance regardless of wind direction could be achieved either with lower noise figures on Ï0, or with higher incidence angles, or by including an additional third-look direction in azimuth (e.g. to achieve a configuration similar to Metop/ASCAT scatterometers) as per the SEASTAR mission concept submitted to EE10.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Remote Sensing of Environment - Volume 216, October 2018, Pages 798-808
Journal: Remote Sensing of Environment - Volume 216, October 2018, Pages 798-808
نویسندگان
Adrien C.H. Martin, Christine P. Gommenginger, Yves Quilfen,