Remote sensing retrieval of total precipitable water under clear-sky atmosphere from FY-4A AGRI data by combining physical mechanism and random forest algorithm

نویسندگان

چکیده

作为中国发射的风云四号系列首颗卫星,FY-4Aæ­è½½äº†å ˆè¿›çš„é™æ­¢è½¨é“è¾å°„æˆåƒä»ªAGRI。本文利用AGRIä¼ æ„Ÿå™¨çš„ä¸­çº¢å¤–åˆ°çƒ­çº¢å¤–æ³¢æ®µè§‚æµ‹æ•°æ®ã€ERA5æ°´æ±½å†åˆ†æžäº§å“ä»¥åŠå ¨çƒæ— çº¿ç”µæŽ¢ç©ºæ•°æ®é›†IGRAç­‰æ•°æ®è¿›è¡Œæ™´ç©ºå¤§æ°”å¯é™æ°´é‡åæ¼”ç ”ç©¶ã€‚åœ¨æµ·æ´‹è¡¨é¢ï¼Œåˆ†åˆ«åˆ©ç”¨å›žå½’åˆ†æžæ³•ä¸Žéšæœºæ£®æž—ç®—æ³•åæ¼”å¤§æ°”å¯é™æ°´é‡ï¼Œåæ¼”ç»“æžœä¸ŽERA5æ°´æ±½äº§å“ç›¸æ¯”ï¼Œå‡æ–¹æ ¹è¯¯å·®ä¸º0.493 cm和0.247 cm。在陆地表面,利用随机森林模型反演大气可降水量,反演结果与ERA5æ°´æ±½äº§å“ç›¸æ¯”ï¼Œå‡æ–¹æ ¹è¯¯å·®ä¸º0.155 cm;与IGRAæ°´æ±½äº§å“ç›¸æ¯”ï¼Œå‡æ–¹æ ¹è¯¯å·®ä¸º0.215 cm。结果表明本文使用的随机森林算法可以有效地提升热红外遥感数据反演大气可降水量的精度。

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ژورنال

عنوان ژورنال: Journal of remote sensing

سال: 2021

ISSN: ['1007-4619', '2095-9494']

DOI: https://doi.org/10.11834/jrs.20211217