Polarimetric Method for Ice Water Content Determination

نویسندگان

  • A. V. RYZHKOV
  • D. S. ZRNIC
  • B. A. GORDON
چکیده

Two variants of a polarimetric method to determine ice water content are presented. One uses specific differential phase and differential reflectivity and the other uses specific differential phase; both quantities are for a 10-cm wavelength. Theoretical considerations indicate that these polarimetric methods are suited for pristine ice crystals. Ice water content of lightly to moderately aggregated crystals might also be estimated. Verification of the proposed method is made using in situ data collected by the T-28 instrumented aircraft. Comparison with two estimators that use the reflectivity factor suggests that the polarimetric methods are better and can quantify correctly ice water content in the range above 0.1 g m23.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Potential of RADARSAT-2 for Sea Ice Classification

Polarimetric data acquired by the CCRS CV-580 airborne SAR is used to assess the capability of RADARSAT-2 for operational sea ice classification. The information content of the polarimetric data is illustrated by showing how specific scattering mechanisms are portrayed by the entropy, anisotropy and α-angle features. Ice type classes are derived from the full pol data set using a complex Wishar...

متن کامل

Polarimetric Decomposition Analysis of Sea Ice Data

This paper explores polarimetric properties of Arctic sea ice. The analysis is performed in several steps. First, the SAR image is segmented into distinct classes using an unsupervised classification algorithm, which incorporates both polarimetric and statistical signal features. The algorithm has built in contextual smoothing through Markov Random Field modeling. The image segments are subsequ...

متن کامل

Classification of Ice Types from Convair-580 Data of Northumberland Strait, PEI

RESUME The discrimination between open water and sea ice, and/or between sub -classes of sea ice are challenges for SAR remote sensing. Compared to single channel SAR data, fully polarimetric data contain more physical information about the scattering processes, which can be used to increase the discrimination accuracy. Unsupervised polarimetric classification or segmentation approaches allow t...

متن کامل

Polarimetric signatures of sea ice 1. Theoretical model

Physical, structural, and electromagnetic properties and interrelating processes in sea ice are used to develop a composite model for polarimetric backscattering signatures of sea ice. Physical properties of sea ice constituents such as ice, brine, air, and salt are presented in terms of their effects on electromagnetic wave interactions. Sea ice structure and geometry of scatterers are related...

متن کامل

Classification Strategies for Polarimetric Sar Sea Ice Data

RESUME Bayesian classification of polarimetric data is based on the complex Wishart distribution of the coherency matrix. The classifier has shown to be a flexible tool available in a variety of options. In this paper we investigate several classification strategies for sea ice classification. All methods show reasonable results, although some user input prior to classification seems beneficial...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998