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Dual-Satellite Stereoscopic Retrieval of Cloud Top Height Using FY-4A and FY-4B
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Dual-Satellite Stereoscopic Retrieval of Cloud Top Height Using FY-4A and FY-4B
We developed a dual-satellite stereoscopic cloud top height(CTH)retrieval algorithm based on the visible band(0.65 pm)data of Fengyun-4A(FY-4A)and FY-4B.This algorithm offers an extensive longitude coverage from 55°E to 177°W.The analysis of system error based on error theory shows that the CTH we retrieved has an accuracy of 0.20-0.88 km and an uncertainty of 0.24-1.08 km over the entire area.The space resolution of the CTH we retrieved reached less than 0.005°.We conducted a CTH retrieval experiment and proceeded to compare our results with FY-4B's CTH product and the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations(CALIPSO).Com-pared to CALIPSO,the CTH we retrieved has a bias of-2.4 km and the correlation coefficient is 0.80.In general,two next-generation geostationary satellites were used simultaneously to retrieve the CTH in our study,demonstrat-ing the ability of this satellite combination to obtain better-quality CTH products by stereoscopic retrieval.
cloud top height(CTH)geostationary satellitesstereoscopicFengyun-4
Xiaotong HUANG、Yilun CHEN、Puxi LI
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Key Laboratory of Tropical Atmosphere-Ocean System of Ministry of Education,School of Atmospheric Sciences,Sun Yat-sen University,Zhuhai 519080
Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080
State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081
cloud top height(CTH) geostationary satellites stereoscopic Fengyun-4
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