• 천문학회지
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• 제47권1호
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• pp.15-39
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• 2014

Polarization is a basic property of light and is fundamentally linked to the internal geometry of a source of radiation. Polarimetry complements photometric, spectroscopic, and imaging analyses of sources of radiation and has made possible multiple astrophysical discoveries. In this article I review (i) the physical basics of polarization: electromagnetic waves, photons, and parameterizations; (ii) astrophysical sources of polarization: scattering, synchrotron radiation, active media, and the Zeeman, Goldreich-Kylafis, and Hanle effects, as well as interactions between polarization and matter (like birefringence, Faraday rotation, or the Chandrasekhar-Fermi effect); (iii) observational methodology: on-sky geometry, influence of atmosphere and instrumental polarization, polarization statistics, and observational techniques for radio, optical, and $X/{\gamma}$ wavelengths; and (iv) science cases for astronomical polarimetry: solar and stellar physics, planetary system bodies, interstellar matter, astrobiology, astronomical masers, pulsars, galactic magnetic fields, gamma-ray bursts, active galactic nuclei, and cosmic microwave background radiation.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.142-145
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• 2006

The synergism of active and passive microwave techniques for hurricane ocean wind remote sensing is explored. We performed the analysis of Windsat data for Atlantic hurricanes in 2003-2005. The polarimetric third Stokes parameter observations from the Windsat 10, 18 and 37 GHz channels were collocated with the ocean surface winds from the Holland wind model, the NOAA HWind wind vectors and the Global Data Assimilation System (GDAS) operated by the National Center for Environmental Prediction (NCEP). The collocated data were binned as a function of wind speed and wind direction, and were expanded by sinusoidal series of the relative azimuth angles between wind and observation directions. The coefficients of the sinusoidal series, corrected for atmospheric attenuation, have been used to develop an empirical geophysical model function (GMF). The Windsat GMF for extreme high wind compares very well with the aircraft radiometer and radar measurements.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2006년도 공동학술대회 논문집
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• pp.271-276
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• 2006

이 논문에서는 다편광 Synthetic Aperture Radar (PolSAR) 관측값을 이용하여 남해안 여자만의 조간대 표면 퇴적물에 대한 지구물리학적 특성에 대한 연구를 실시하였다. 원격 탐사를 이용한 조간대 지역의 연구는 종래의 야외 조사를 통한 연구 방법의 한계를 보완할 수 있으며 특히 다편광 SAR 자료는 주 야 및 기상 상태와 관계 없이 지구 표면의 지구물리학적 정보를 정량적으로 획득 할 수 있다. 이 연구를 위하여 사용된 여자만 지역의 다편광 AIRSAR 자료는 2000 년 9 월 30 일 NASA/JPL PACRIM-II 프로젝트를 통해 획득되었다. AIRSAR 자료의 다편광 정보를 이용한 마이크로파의 산란모델을 바탕으로 조간대 지역의 표면퇴적물에서의 마이크로파 산란 특성을 연구하였다.