다층 상세 태양복사 모델에 의한 단층 태양복사 모델의 보정

지준범(Joon-Bum Jee),이원학(Won-Hak Lee),조일성(Il-Sung Zo),이규태(Kyu-Tae Lee) 한국기상학회 2011 대기 Vol.21 No.2

서울지역의 고해상도 수치표고모델기반 태양 에너지 산출

지준범(Joon-Bum Jee),장민(Min Jang),민재식(Jae-Sik Min),조일성(Il-Sung Zo),김부요(Bu-Yo Kim),이규태(Kyu-Tae Lee) 한국기상학회 2017 대기 Vol.27 No.3

서울지역의 고해상도 WISE-WRF 모델의 지표면 거칠기 길이 개선에 따른 민감도 분석

지준범(Joon-Bum Jee),장민(Min Jang),이채연(Chaeyeon Yi),조일성(Il-Sung Zo),김부요(Bu-Yo Kim),박문수(Moon-Soo Park),최영진(Young-Jean Choi) 한국기상학회 2016 대기 Vol.26 No.1

강원도 지자체별 관광객 수 예측 알고리즘 개발

지준범(Jee, Joon-Bum),조일성(Zo, Il-Sung),배준호(Bae, Joon-Ho) 한국관광레저학회 2022 관광레저연구 Vol.34 No.10

In this study, a machine learning-based model was built to predict the number of visitors with municipality in Gangwon province using big data with tourist, meteorological observation (air temperature, rainfall, wind speed, wind direction, relative humidity, atmospheric pressure, sunshine duration, solar radiation and cloud fraction) and temporal variables (day, week, and year). The relative influence of meteorological variables was found to be 37.9% on average in Gangwon province through the contribution analysis by input data. As a result of annual predictive analysis, the correlation is 0.81 on average in Gangwon province, with the highest municipality is Inje-gun (0.86) and the lowest municipality is Cheorwon-gun (0.73). And as a result of seasonal analysis, summer (0.93) represents the highest correlation, followed by winter (0.76), spring (0.74), and autumn (0.66). The municipality with the lowest and highest RMSE compared to the average daily number of visitors are Wonju-si (16.6%) and Yeongwol-gun (33.1%), respectively.

집중관측 자료를 이용한 춘천기상대 태양광 패널의 온도 및 태양광 발전량 분석

지준범(Jee Joon-Bum),조일성(Zo Il-Sung),이규태(Lee Kyu-Tae),이원학(Lee Won-Hak),최성진(Choi Sung-Jin) 한국태양에너지학회 2022 한국태양에너지학회 논문집 Vol.42 No.2

In this study, photovoltaic (PV) electricity power and PV panel temperature for operation and monitoring of PV power plant were calculated and analyzed. A PV panel temperature sensor was installed at the Chuncheon Meteorological Observatory solar power plant for intensive observation from May 1 to August 19, 2018. When the calculated PV panel temperature was analyzed using the measured PV panel temperature, the calculated PV panel temperature was overestimated at a higher temperature compared to the measured PV panel temperature, which was overestimated at a lower temperature; however, the determination coefficient (R²) was 0.88 or more. The bias was -0.33°C and RMSE was 3.43°C when the ground observation data were used. However, when the Local Data Assimilation and Prediction (LDAPS) model were used, the bias was 0.22°C and RMSE was 4.27°C. The PV electricity power generation by ground meteorological observation data (Korea Meteorological Administration, KMA), LDAPS model prediction data (LDAPS), and Communication Ocean and Meteorological Satellite (COMS) data using the PV module temperature were compared with those of the Chuncheon PV power plant. The determination coefficient (R²) of PV power generation was the highest for KMA (0.91) followed by COMS (0.88) and LDAPS (0.84). The slope of the linear regression, (1.05) for KMA, and the smallest bias (2.24 kWh) and RMSE (3.38 kWh) were similar to the measured values. However, compared to the LDAPS, the slope (1.23) of the linear regression was the largest in COMS, and the bias (4.77 kWh) and RMSE (6.23 kWh) were slightly higher.

권운 내 빙정의 종류와 크기에 따른 복사 평형 온도 변화

지준범(Joon-bum Jee),이원학(Won-Hak Lee),이규태(Kyu-Tae Lee) 한국기상학회 2010 대기 Vol.20 No.4

마이크로웨이브 강수량을 이용한 MTSAT-1R 위성의 강우강도 추정

지준범,이규태,Jee, Joon-Bum,Lee, Kyu-Tae 대한원격탐사학회 2010 大韓遠隔探査學會誌 Vol.26 No.5

MTSAT-1R의 적외 채널 밝기온도와 마이크로웨이브 강수량 자료를 이용하여 강수량을 추정하였다. 정지위성의 밝기온도와 다양한 마이크로웨이브(SSM/I, SSMIS, AMSU-B, AMSRE, TRMM) 강수량의 시공간일지 자료생성 및 관계성을 분석하여 MTSAT-1R 밝기온도와 마이크로웨이브 강수량의 조견표를 작성하였으며 밝기온도에 적용하여 강수량을 산출하였다. 산출 강수량은 지상 AWS 및 TRMM 위성자료를 이용하여 검증하였다. TRMM 2A12(TMI) 방법에 산출 강수량은 AWS 및 TRMM3B42 강수량 검증에서 상관계수는 0.38과 0.61, RMSE는 5.81과 2.44 mm/hr, PC는 0.79와 0.84 그리고 POD는 0.65와 0.87로 가장 높은 결과를 보였다. 전체적으로 위성을 이용한 강수량 산출에서 AWS 강수량과 비교하여 5 mm/hr 이상 그리고 TRMM3B42 강수량과 비교하여 2 mm/hr 이상 많은 강수를 추정하였다. 강수량의 검증 결과는 TRMM 2A12, AMSRE, SSM/I, AMSU-B 및 SSMIS 계열 방법순서로 상관성 등의 대부분 검증에서 높은 결과를 나타내었다. Rainfall intensity was estimated using the MTSAT-1R infrared channels and the microwave satellite precipitation data. Brightness temperature of geostationary satellite is matched temporal and spatial to a variety of microwave satellite(SSM/I, SSMIS, AMSU-B, AMSRE, TRMM) precipitation data. Rainfall intensity was calculated by the look -up table using relationships of MTSAT-1R brightness temperature and microwave precipitation. Estimated rainfall is verified using by precipitation of TRMM satellite(TRMM3B42) and ground rainfall as AWS from Jul. 21 2008 to Jul. 25 2008. The results of rainfall estimated TRMM 2A12(TMI) that validated by AWS and TRMM3B42 precipitation are represented highly 0.38 and 0.61 by correlation coefficient, 5.81 mm/hr and 2.44 mm/hr by RMSE, 0.79 and 0.84 by POD and 0.65 and 0.87 by PC, respectively. Overall, estimated rainfall using by microwave satellite calculated 5 mm/hr or more comparing by AWS and 5 mm/hr or more comparing by TRMM3B42 precipitation, respectively. Validation results of correlation coefficient are shown series of TRMM 2A12, AMSRE, SSM/I, AMSU-B and SSMIS.

고해상도 Landsat 8 위성자료기반의 지표면 온도 산출

지준범 ( Joon Bum Jee ),김부요 ( Bu Yo Kim ),조일성 ( Il Sung Zo ),이규태 ( Kyu Tae Lee ),최영진 ( Young Jean Choi ) 대한원격탐사학회 2016 大韓遠隔探査學會誌 Vol.32 No.2

2013년부터 2014년까지 관측된 Landsat 8 위성자료로부터 지표면 온도를 산출하였고 산출된 지표면 온도는 지상에서 관측된 지표면 온도를 이용하여 보정하였다. 지표면 온도지도는 Landsat 8로부터 산출된 지표면 온도를 지상에서 관측된 지표면 온도와의 선형 회귀식을 이용하여 계산되었다. 계절과 년에 대한 지표면 온도는 각각 계절과 년에 대하여 사례들을 평균하여 계산되었다. 지표면 온도는 도시의 공업 또는 상업지역에서 높은 온도가 나타나는 반면, 서울주변의 높은 고도의 산악과 해양, 강 등에서 낮은 지표면 온도가 나타났다. 위성에서 산출된 지표면 온도를 보정하기 위하여 서울을 포함한 수도권지역에서 관측되는 기상청 종관측소 3개 지점 (서울(지점번호: 108), 인천(지점번호: 119), 수원(지점번호: 112))의 지표면 관측자료를 이용하여 선형회귀방법을 적용하였다. Landsat 8의 지표면 온도는 모든 자료에서 기울기가 0.78이었고 5개의 흐린날을 제외한 맑은 상태의 자료에서 0.88이었다. 그리고 초기 지표면온도에서 상관계수는 0.88이었고 평방근 오차 (Root Mean Sqare Error (RMSE))는 5.33℃이었다. 지표면 온도 보정이후에는 상관계수는 0.98 그리고 RMSE는 2.34℃이었으며 회귀식의 기울기는 0.95로 개선되었다. 계절 및 년 지표면 온도는 상업지역과 공업지역 그리고 도시와 주변지역을 잘 표현하였다. 결과적으로 지상에서 관측된 지표면 온도를 이용하여 위성에서 산출된 지표면온도를 보정하였을 때 실제 상태와 유사한 분포를 보였다. Land Surface Temperature (LST) retrieved from Landsat 8 measured from 2013 to 2014 and it is corrected by surface temperature observed from ground. LST maps are retrieved from Landsat 8 calculate using the linear regression function between raw Landsat 8 LST and ground surface temperature. Seasonal and annual LST maps developed an average LST from season to annual, respectively. While the higher LSTs distribute on the industrial and commercial area in urban, lower LSTs locate in surrounding rural, sea, river and high altitude mountain area over Seoul and surrounding area. In order to correct the LST, linear regression function calculate between Landsat 8 LST and ground surface temperature observed 3 Korea Meteorological Administration (KMA) synoptic stations (Seoul(ID: 108), Incheon(ID: 112) and Suwon(ID: 119)) on the Seoul and surrounding area. The slopes of regression function are 0.78 with all data and 0.88 with clear sky except 5 cloudy pixel data. And the original Landsat 8 LST have a correlation coefficient with 0.88 and Root Mean Square Error (RMSE) with 5.33°C. After LST correction, the LST have correlation coefficient with 0.98 and RMSE with 2.34°C and the slope of regression equation improve the 0.95. Seasonal and annual LST maps represent from urban to rural area and from commercial to industrial region clearly. As a result, the Landsat 8 LST is more similar to the real state when corrected by surface temperature observed ground.

정지궤도 위성자료를 이용한 지표면 도달 태양복사량 연구

지준범 ( Joon Bum Jee ),조일성 ( Il Sung Zo ),이규태 ( Kyu Tae Lee ) 대한원격탐사학회 2013 大韓遠隔探査學會誌 Vol.29 No.1

정지기상 위성의 가시채널에서 관측되는 반사도는 지상의 일사량 관측자료와 비교하여 구름량 계산이 가능하며 이를 이용하여 지표면에 도달되는 일사량을 추정할 수 있다. 기상 센서(MI)의 경우는 675 nm 파장으로 관측된 반사도를 이용하며 해양 센서(GOCI)는 기상 센서(MI)의 관측파장과 유사한 660 nm, 680 nm 파장으로 관측된 자료를 이용할 수 있다. 연구를 위하여 태풍이 있었던 흐린 날과 맑은 날을 선정하였으며 정지위성으로부터 관측된 자료들을 이용하였다. 위성영상의 반사도가 40%이상 높은 화소들은 0.3이하의 청천지수가 나타났으며 70%이상의 태양에너지가 차폐되었다. 또한 15%이하의 반사도가 나타나는 화소들은 0.9 이상의 청천지수가 나타났으며 90%이상의 태양에너지가 지표면에 도달되었다. 계산된 일누적 일사량은 기상청 22개 관측소의 관측 일누적 일사량과 비교하였다. COMS와 MTSAT의 MI센서의 경우 관측값과 비교하여 다소 작게 계산되었으며 GOCI센서를 이용한 계산결과인 상관계수 0.96보다 낮은 0.94와 0.93의 상관성을 보였다. 그리고 일사량 관측값에 대한 RMSE는 MTSAT, COMS MI, GOCI순으로 2.21, 2.09, 2.02 MJ/m2로 나타났다. 또한 COMS GOCI센서의 일누적 계산결과를 지상 관측자료와 비교하였을 때 흐린 날과 맑은 날의 상관성은 각각 0.96과 0.86이었으며 RMSE는 1.82 MJ/m2와 2.27 MJ/m2로서 흐린 날의 상관성이 높게 나타났다. COMS 위성의 해양 센서는 기상센서와 비교하여 관측시각이 한정적이고 관측의 불연속이 있으나 높은 해상도의 이점이 있기 때문에 태양에너지 분석 등의 연구에 유용할 것으로 사료된다. The reflectance observed in the visible channels of a geostationary meteorological satellite can be used to calculate the amount of cloud by comparing the reflectance with the observed solar radiation data at the ground. Using this, the solar radiation arriving at the surface can be estimated. This study used the Meteorological Imager (MI) reflectance observed at a wavelength of 675 nm and the Geostationary Ocean Color Imager (GOCI) reflectance observed at similar wavelengths of 660 and 680 nm. Cloudy days during a typhoon and sunny days with little cloud cover were compared using observation data from the geostationary satellite. Pixels that had more than 40% reflectance in the satellite images showed less than 0.3 of the cloud index and blocked more than 70% of the solar energy. Pixels that showed less than 15% reflectance showed more than 0.9 of the cloud index and let through more than 90% of the solar energy to the surface. The calculated daily accumulated solar radiation was compared with the observed daily accumulated solar radiation in 22 observatories of the Korean Meteorological Administration. The values calculated for the COMS and MTSAT MI sensors were smaller than the observation and showed low correlations of 0.94 and 0.93, respectively, which were smaller than the 0.96 correlation coefficient calculated for the GOCI sensor. The RMSEs of MTSAT, COMS MI and GOCI calculation results showed 2.21, 2.09, 2.02 MJ/m2 in order. Comparison of the calculated daily accumulated results from the GOCI sensor with the observed data on the ground gave correlations and RMSEs for cloudy and sunny days of 0.96 and 0.86, and 1.82 MJ/m2 and 2.27 MJ/m2, respectively, indicating a slightly higher correlation for cloudy days. Compared to the meteorological imager, the geostationary ocean color imager in the COMS satellite has limited observation time and observation is not continuous. However, it has the advantage of providing high resolution so that it too can be useful for solar energy analysis.

한반도 태양에너지 연구를 위한 일사량 자료의 TMY 구축

지준범(Jee, Joon-Bum),이승우(Lee, Seung-Woo),최영진(Choi, Young-Jean),이규태(Lee, Kyu-Tae) 한국신재생에너지학회 2012 신재생에너지 Vol.8 No.2

The TMY (Typical Meteorological Year) for the solar energy study is generated using observation data with 22 solar sites from KMA (Korea Meteorological Administration) during 11 years (2000-2010). The meteorological data for calculation the TMY are used solar radiation, temperature, dew point temperature, wind speed and humidity data. And the TMY is calculated to apply the FS (Finkelstein and Schafer) statistics and RMSE (Root Mean Squared Error) methods. FS statistics performed with each point and each variable and then selected top five candidate TMM months with statistical analysis and normalization. Finally TMY is generated to select the highest TMM score with evaluation the average errors for the 22 whole points. The TMY data is represented average state and long time variations with 22 sites and meteorological data. When TMY validated with the 11-year daily solar radiation data, the correlation coefficient was about 0.40 and the highest value is 0.57 in April and the lowest value is 0.23 in May. Mean monthly solar radiation of TMY is 411.72 MJ which is 4 MJ higher than original data. Average correlation coefficient is 0.71, the lowest correlation is 0.43 in May and the highest correlation is 0.90 in January. Accumulated annual solar radiation by TMY have higher value in south coast and southwestern region and have relatively low in middle regions. And also, differences between TMY and 11-year mean of is distributed lower 100 MJ in Kyeongbuk, higher 200 MJ in Jeju and higher 125 MJ in Jeonbuk and Jeonnam, respectively.