Preliminary test of quantitative capability in aerosol retrieval over land from MERSI-II onboard FY-3D

نویسندگان

چکیده

é£Žäº‘ä¸‰å·å«æ˜Ÿæ­è½½çš„ä¸­åˆ†è¾¨çŽ‡å ‰è°±æˆåƒä»ªMERSI(MEdium-Resolution Spectral Imager)与NASA的MODISå±žäºŽåŒç±»åž‹ä¼ æ„Ÿå™¨ï¼Œå¤§å¤šæ•°é€šé“è®¾è®¡ç›¸ä¼¼ï¼Œå ·å¤‡æ°”æº¶èƒ¶åæ¼”çš„èƒ½åŠ›ï¼Œä½†ç›®å‰è¿˜æ²¡æœ‰ç²¾åº¦å¯é ã€ç¨³å®šä¸”å ¨çƒé€‚ç”¨çš„ä¸šåŠ¡åŒ–æ°”æº¶èƒ¶äº§å“å¯ä¾›ä½¿ç”¨ã€‚æœ¬æ–‡å€Ÿé‰´MODISæš—ç›®æ ‡DT(Dark target)算法思想,针对新发射的风云三号D星搭载的升级版MERSI-IIä¼ æ„Ÿå™¨ï¼Œæž„å»ºå ¨çƒé€‚ç”¨çš„é™†åœ°æ°”æº¶èƒ¶åæ¼”ç®—æ³•ã€‚ä¸ºæµ‹è¯•MERSI-IIä¼ æ„Ÿå™¨æ°”æº¶èƒ¶åæ¼”çš„å®šé‡èƒ½åŠ›ï¼Œå¹¶ä¸ŽMODISæ°”æº¶èƒ¶äº§å“å ·æœ‰å¯å¯¹æ¯”æ€§ï¼Œæœ¬æ–‡ç®—æ³•è®¾è®¡å°½å¯èƒ½ä¸ŽDT算法在各方面处理相一致,主要在两个方面进行了改进与优化:(1ï¼‰è€ƒè™‘åˆ°ä¼ æ„Ÿå™¨æ³¢æ®µè®¾ç½®å·®å¼‚ï¼Œç»™å‡ºäº†é’ˆå¯¹MERSI-II的地表反射率估计模型;(2ï¼‰æ”¹è¿›å† é™†æ°´ä½“åˆ¤åˆ«æ–¹æ³•ï¼Œè§£å†³DT算法雾霾漏反演的缺陷。通过将单景反演结果与MODISæ°”æº¶èƒ¶äº§å“å¯¹æ¯”ï¼Œåæ¼”ç»“æžœçš„ç©ºé—´åˆ†å¸ƒå’Œå€¼åŸŸå¤§å°å‡å ·æœ‰è¾ƒå¥½çš„ä¸€è‡´æ€§ï¼Œç›¸å ³ç³»æ•°è¾¾åˆ°0.9以上;有效地实现雾霾高值区反演,而MODIS产品在该区域漏反演。通过对3ä¸ªæœˆä»½å ¨çƒæ•°æ®åæ¼”è¯•éªŒï¼Œåˆ©ç”¨AERONETåœ°åŸºç«™ç½‘è§‚æµ‹æ•°æ®å¯¹ç»“æžœè¿›è¡ŒéªŒè¯ï¼Œè½å ¥æœŸæœ›è¯¯å·®EE=±(0.05+0.15τ)范围的点数达到65.14%,接近2/3çš„è¦æ±‚ï¼Œç›¸å ³ç³»æ•°è¾¾åˆ°0.866ï¼Œæ•´ä½“å ·æœ‰è¾ƒé«˜çš„éªŒè¯ç²¾åº¦ï¼›MERSIå¹ å®½å¤§äºŽMODISï¼ŒåŠ ä¹‹æœ¬æ–‡åƒå ƒæŽ©è†œçš„æ”¹è¿›ï¼Œä½¿å¾—MERSIåæ¼”åƒå ƒæ•°å¢žåŠ æ›´å¤šï¼ŒåŒ¹é çš„éªŒè¯ç‚¹æ¯”ä¾‹è¾ƒMODIS高出20%左右。进一步将月平均结果与MODISè¿›è¡Œå¯¹æ¯”ï¼Œç©ºé—´åˆ†å¸ƒä¸€è‡´æ€§è¾ƒå¥½ï¼Œåæ¼”ç»“æžœå¤§å°å¯¹æ¯”ç›¸å ³æ€§è¾ƒå¥½ï¼Œç›¸å ³ç³»æ•°è¾¾åˆ°0.93左右。表明本文针对MERSI-IIæ°”æº¶èƒ¶åæ¼”ç®—æ³•ç»“æžœå·²æŽ¥è¿‘å›½é™ åŒç±»åž‹äº§å“çš„ç²¾åº¦è¦æ±‚ï¼Œå°†ä¸ºå ¨çƒé•¿æ—¶é—´åºåˆ—æ°”æº¶èƒ¶è§‚æµ‹æœ‰æä¾›é‡è¦è¡¥å 。从而印证了MERSIè§‚æµ‹æ•°æ®å·²å ·æœ‰è¾ƒå¥½çš„å®šé‡åº”ç”¨èƒ½åŠ›ï¼Œä¼ æ„Ÿå™¨æ€§èƒ½ã€å®šæ ‡ç­‰æ­£åœ¨é€æ¸èµ°å‘æˆç†Ÿã€‚

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ژورنال

عنوان ژورنال: Journal of remote sensing

سال: 2022

ISSN: ['1007-4619', '2095-9494']

DOI: https://doi.org/10.11834/jrs.20210286