http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
주사형 편광라이다시스템 개발과 대전 유성 상공 대기 에어로졸 편광비의 맵핑
박찬봉(Chan-Bong Park) 한국정보기술학회 2020 한국정보기술학회논문지 Vol.18 No.8
In this study, we developed a scanning polarization lidar system that can scanning the spatial distribution of aerosol polarization ratio in the air by using vertical and horizontal polarization of 532 ㎚ laser light. Using this lidar system, the aerosol polarization ratio over Yuseung in Daejeon city was measured and mapped. This system is capable of 360 degree rotation measurement horizontally using a 500×800 reflector. As a result of the measurement, the aerosol polarization ratio showed an average value of about 8-10% on December 14 and 26, 2019 with less fine dust, and about 13-18% with heavy dust days on January 9 and 10, 2020. In particular, as a result of the lidar mapping, it can be confirmed that the aerosol spatial distribution shows regional variation even in the Yuseung region. This paper reports on the developed scanning lidar system and the cases of measurement results.
아시아-황사 네트워크에서의 편광 라이다를 이용한 대전 상공 황사의 광학적 계측 및 이동경로분석
박찬봉(Chan-Bong Park) 한국정보기술학회 2014 한국정보기술학회논문지 Vol.12 No.10
In this paper, for the analysis of optical parameters and vertical distribution of continental dust, the Asian Dust over Daejeon city has been measured by two wavelengths depolarization lidar system and then compared with the results measured at other stations in AD-NET and HYSPLIT trajectory analysis model. The first case of the dust was measured below 4 km during May 28-30 and the second descending dust from 6 km was measured during May 29 - June 1, 2014. Maximum backscatter coefficients about 1.0x10<SUP>-5</SUP>/m/sr were measured with the maximum depolarization ratio of 27% (1st case) and 20% (2nd case) respectively. As the comparison results of the dust measured at Daejeon, similarly formed dust has been measured at 9 stations in the AD-Net, during the period from May 28 to June 1. The maximum depolarization ratio, about 28% were measured at the station of Matsue and Nagasaki. The route of the dust over Daejeon analyzed by HYSPLIT model showed that the dust mainly passed over west area of Japan (1st case) and northern district of the East Sea (2nd case).
다파장 라이다 시스템을 이용한 대기 에어로졸 광 파라미터의 계측
박찬봉(Chan-Bong Park),이영우(Young-Woo Lee) 한국정보기술학회 2016 한국정보기술학회논문지 Vol.14 No.5
This paper is reporting a result of continuous measurement and analyzes the particle shape, size distribution and mass concentration of atmospheric aerosol those were measured by 532/1064 nm multi-wavelengths depolarization lidar. The particle size distribution between 0.037~2.7μm were calculated from lidar measurements on November 5, 6, 15, 16, and 21 in 2015 where the depolarization ratio at 532 nm were over 5% in the region of boundary layer. As the results, over 50μ㎠/㎤ particle square were measured at 0.4~2.3μm range of particle radius on November 5, 2015 and below 0.4μm range on November 11, 2015 respectively. Also 22μ㎠/㎤ at 0.4μm range during November 15-16, and 68μc㎡/㎤ at 0.07 μm were measured on November 21, 2015. The spherical aerosol concentration were calculated from mean extinction coefficients below boundary altitudes with mass extinction conversion factor of 3.6㎡g<SUP>−1</SUP>. As a result, 22~70μg/㎥ mass concentration were measured on November 2-5, 11, 15, 21, 2015 those were higher than mean concentration in November 2015.
편광 라이다 시스템을 이용한 대전상공 대기 미세먼지 농도의 장기 계측
박찬봉(Chan-Bong Park) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.3
In this paper, it is reported that we have developed a 532nm polarized Lidar system and algorithm, and used it to measure the mass concentration of fine dust (PM10 level) at altitudes lower than the atmospheric air boundary layer over the long term from January 2016 to November 30, 2016. The average concentration of fine dust was more than 35μg/㎥ from January to May as a result of the measurements. From June to August, the average concentration was less than 15μg/㎥. In addition, the monthly incidence of the number of days with a value of more than 80μg/m3, which is the risk level of fine dust concentration, was more than 50% from January to May, and less than 20% after June and more than 20% in November. As a result of comparing the lidar data with the PM10 data, it showed an average error of about 7.9μg/㎥ from January to May 2016.
24시간 연속 관측 라이다를 이용한 대전시 상공 에어로솔/황사/구름의 광 계측
박찬봉(Chan-Bong Park),이영우(Young-Woo Lee) 한국정보기술학회 2011 Proceedings of KIIT Conference Vol.2011 No.5
대류권 에어로솔, 구름 및 황사의 24시간 정밀 관측이 가능한 라이다를 개발하여 본 목원대학교 환경감시센터에서 지난 2011년 4월부터 운영 중에 있다. 본 라이다는 532㎚, 1064 ㎚의 레이저 광을 이용하여, 지상에서 고도 15 ㎞ 까지 대류권에서의 에어로솔, 황사, 구름 등의 후방산란계수, 편광소멸비, IR/UV 산란계수비, IR/UV 편광소멸비등의 광학적 파라메터를 연속 계측하고 있다. 본 연구에서는 이들 대기 물질의 광학적 특성과 이의 3차원 시공간 분포 변화에 대하여 보고한다. The lidar system, can measure the aerosols, Asian dust, and cloud in troposphere continuously during 24 hours/day with high resolution (6 meter) is developed and in operation at the Environment Monitoring Center, Mokwon University since April 2011. The 532 ㎚ and 1064 ㎚ wavelengths are used for the measurement of optical parameters; backscatter coefficients, depolarization ratio, IR/UV ratio of backscatter coefficients and IR/UV ratio of depolarization ratios of aerosols, Asian dust and cloud from ground up to 10 ㎞. In this research, we will report the analysis results of those optical parameters and 3D (three dimensional), spatial temporal variation characteristics of the aerosols, Asian-dust, and Cloud.
대구경 라이다 시스템을 이용한 성층권 및 중간권 대기온도의 계측
박찬봉(Chan-Bong Park),이영우(Young-Woo Lee) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.1
Vertical temperature profile in stratosphere and mesosphere was measured by Large Aperture Lidar at Mokwon University at Daejeon city, Korea. The Lidar system consists of a laser transmission system with a wavelength of 355nm, a 600mm telescope, a PMT detector and a photon counter. The measurements were performed for 4 hours from 8 pm on August 16, 2016 and successfully measured atmospheric temperatures ranging from 10 to 60 km altitude with CHANIN-HAUCHECORNE algorithm after SIN correction of the received signals. The measured temperature is in the range of 200 to 260K. As a result of comparison with the NCEP and CIRA, we obtained very consistent results with NCEP data of less than about 5K over the entire range of 10 to 55km and an error of about 10K with CIRA.
에어로솔/황사/구름의 24시간 연속 관측을 위한 이중 편광 레이저레이더 시스템의 개발
박찬봉(Chan-Bong Park),이영우(Young-Woo Lee) 한국정보기술학회 2011 한국정보기술학회논문지 Vol.9 No.12
The laser radar system that can measure the aerosols, Asian dust, and cloud in troposphere continuously during 24 hours/day with high resolution (6 meter) is developed. The vertical and parallel polarization component of 532㎚ and 1064㎚ wavelengths are used for the measurement of optical parameters; backscatter coefficients, depolarization ratio, IR/UV ratio of backscatter coefficients and IR/UV ratio of depolarization ratios of aerosols, Asian dust and cloud from ground up to 15㎞. As the results, in the cases of cloud measurements, IR/UV ratio of backscatter coefficients and depolarization ratios were approached to the value of 1 respectively and in the cases of aerosols both values were in the range of 0.2~1 and 1~8 respectively, In this paper, we report the analysis results of those optical parameters and three dimensional spatial temporal variation characteristics of the aerosols, Asian dust and cloud.