کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4676509 | 1347764 | 2009 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sea ice thickness measurements by ultrawideband penetrating radar: First results
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study evaluates the potential of ultrawideband penetrating radar for the measurement of sea ice thickness. Electromagnetic modeling and system simulations were first performed to determine the appropriate radar frequencies needed to simultaneously detect both the top ice surface (snow-ice interface) and to penetrate through the lossy sea ice medium to identify the bottom ice surface (ice-ocean interface). Based on the simulation results, an ultrawideband radar system was built that operated in two modes to capture a broad range of sea ice thickness. The system includes a low-frequency mode that operates from 50-250Â MHz for measuring sea ice thickness in the range of 1 to 7Â m (both first-year and multiyear ice types) and a high-frequency mode that operates from 300-1300Â MHz to capture a thinner range of thickness between 0.3 and 1Â m (primarily first-year ice type). Two field tests of the radar were conducted in 2003, the first off Barrow, Alaska, in May and the second off East Antarctica in October. Overall the radar measurements showed a mean difference of 14Â cm and standard deviation of 30Â cm compared with in situ measurements over first-year ice that ranged from 0.5 to 4Â m in thickness. Based on these initial results, we conclude that ultrawideband penetrating radar is feasible for first-year sea ice thickness measurements. We discuss approaches for further system improvements and implementation of such a system on an airborne platform capable of providing regional sea ice thickness measurements for both first-year and multiyear ice from 0.3 to 10Â m thick.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 55, Issue 1, January 2009, Pages 33-46
Journal: Cold Regions Science and Technology - Volume 55, Issue 1, January 2009, Pages 33-46
نویسندگان
Benjamin Holt, Pannirselvam Kanagaratnam, Siva Prasad Gogineni, Vijaya Chandran Ramasami, Andy Mahoney, Victoria Lytle,