{"id":729,"date":"2023-12-02T16:22:47","date_gmt":"2023-12-02T08:22:47","guid":{"rendered":"https:\/\/www.notown.top\/?p=729"},"modified":"2023-12-02T16:24:09","modified_gmt":"2023-12-02T08:24:09","slug":"729","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=729","title":{"rendered":"\u8f90\u5c04\u6821\u6b63\u3001\u8f90\u5c04\u5b9a\u6807\u3001\u5927\u6c14\u6821\u6b63\u540d\u8bcd\u68b3\u7406"},"content":{"rendered":"<h2>\u57fa\u7840\u77e5\u8bc6<\/h2>\n<h3>DN\u503c\uff08Digital Number\uff09<\/h3>\n<p>\u56fe\u50cf\u50cf\u7d20\u503c\uff0c\u5373<strong>\u4f20\u611f\u5668\u5f97\u5230\u7684\u6570\u5b57\u6d4b\u91cf\u503c<\/strong>\u3002\u5176\u4ed6\u5927\u5c0f\u4e0e\u4f20\u611f\u5668\u7684\u8f90\u5c04\u5206\u8fa8\u7387\u3001\u5730\u7269\u53d1\u5c04\u9891\u7387\u3001\u5927\u6c14\u900f\u8fc7\u7387\u3001\u6563\u5c04\u7387\u6709\u5173\uff0c\u53cd\u6620\u5730\u7269\u8f90\u5c04\u7387\u3002<\/p>\n<p>\u5982\u679c\u7528n\u4e2abit\u8868\u793a\u4e00\u4e2a\u50cf\u5143\u7684\u5927\u5c0f\uff0c\u5219\u503c\u7684\u8303\u56f4\u4e3a[$0,2^n &#8211; 1$]<\/p>\n<h3>\u8f90\u5c04\u7387\uff08Radiance\uff09<\/h3>\n<p>\u4e5f\u53eb\u8f90\u5c04\u4eae\u5ea6\u503c\u3002<strong>\u67d0\u4e00\u9762\u79ef\u7684\u8f90\u5c04\u80fd\u91cf\u7684\u603b\u548c<\/strong>\u3002\u662f\u8f90\u5c04\u5b9a\u6807\u7684\u7ed3\u679c\u4e4b\u4e00\u3002<\/p>\n<h3>\u53cd\u5c04\u7387\uff08Reflectance\uff09<\/h3>\n<p>\u7269\u4f53\u8868\u9762<strong>\u53cd\u5c04\u7684\u8f90\u5c04\u91cf<\/strong>\u6bd4\u4e0a\u7269\u4f53<strong>\u6536\u5230\u7684\u8f90\u5c04\u91cf<\/strong>\uff0c\u503c\u7684\u8303\u56f4\u662f[0,1]\uff0c\u4e3a\u4e86\u5b58\u50a8\u65b9\u4fbf\u901a\u5e38\u6269\u5927\u4e00\u5b9a\u500d\u6570\uff08MODIS\u6269\u5927\u4e8610000\u500d\uff09<br \/>\n&#8211; <strong>\u8868\u89c2\u53cd\u5c04\u7387<\/strong>\uff08apparent reflectance\uff09\uff1a\u5927\u6c14\u5c42\u9876\u7684\u53cd\u5c04\u7387\uff0c\u4e00\u822c\u6307\u7684\u662f\u5927\u6c14\u8868\u89c2\u53cd\u5c04\u7387\uff08\u89c6\u53cd\u5c04\u7387\uff09\u3002\u662f\u8f90\u5c04\u5b9a\u6807\u7684\u7ed3\u679c\u4e4b\u4e00\u3002<br \/>\n  &#8211; \u4f1a\u53d7\u4e91\u5c42\u3001\u6c14\u6eb6\u80f6\u3001\u5927\u6c14\u7684\u5f71\u54cd\uff0c\u901a\u8fc7\u8f90\u5c04\u4eae\u5ea6\u5b9a\u6807\u53c2\u6570\u3001\u592a\u9633\u8f90\u5c04\u89d2\u3001\u6210\u50cf\u65f6\u95f4\u7b49\u6765\u8ba1\u7b97\u3002<br \/>\n&#8211; <strong>\u5730\u8868\u53cd\u5c04\u7387<\/strong>\uff08surface albedo\uff09\uff1a<strong>\u5730\u9762\u53cd\u5c04\u8f90\u5c04\u91cf\u4e0e\u5165\u5c04\u8f90\u5c04\u91cf\u4e4b\u6bd4<\/strong>\uff0c\u8868\u5f81\u5730\u9762\u5bf9\u592a\u9633\u8f90\u5c04\u7684\u5438\u6536\u548c\u53cd\u5c04\u80fd\u529b\uff0c\u53cd\u5c04\u7387\u8d8a\u5927\uff0c\u5730\u9762\u5438\u6536\u592a\u9633\u8f90\u5c04\u8d8a\u5c0f\uff1b\u53cd\u5c04\u7387\u8d8a\u5c0f\uff0c\u5730\u9762\u5438\u6536\u592a\u9633\u8f90\u5c04\u8d8a\u591a\u3002<\/p>\n<h2>\u8f90\u5c04\u6821\u6b63\uff08Radiometric correction\uff09<\/h2>\n<p>\u4e00\u5207\u4e0e<strong>\u8f90\u5c04\u76f8\u5173\u7684\u8bef\u5dee\u7684\u6821\u6b63<\/strong>\uff0c\u5176\u5b9e\u5c31\u662f<strong>\u5bf9\u56fe\u50cf\u50cf\u7d20\u503c\u7684\u6821\u6b63<\/strong><br \/>\n\u5b8c\u6574\u7684\u8f90\u5c04\u6821\u6b63\u5305\u542b\uff1a\u8f90\u5c04\u5b9a\u6807\u3001\u5927\u6c14\u6821\u6b63\u3001\u592a\u9633\u9ad8\u5ea6\u548c\u5730\u5f62\u6821\u6b63<br \/>\n&#8211; <strong>\u8f90\u5c04\u5b9a\u6807<\/strong>\uff08Radiometric calibration\uff09\uff1a<strong>\u5c06\u8bb0\u5f55\u7684\u539f\u59cbDN\u503c\u8f6c\u6362\u4e3a\u5927\u6c14\u8868\u89c2\u53cd\u5c04\u7387<\/strong>\uff08\u8f90\u5c04\u4eae\u5ea6\u503c\uff09<br \/>\n  &#8211; \u76ee\u7684\uff1a\u6d88\u9664\u4f20\u611f\u5668\u672c\u8eab\u7684\u8bef\u5dee\uff0c\u786e\u5b9a\u4f20\u611f\u5668\u5165\u53e3\u5904\u7684\u51c6\u786e\u8f90\u5c04\u503c<br \/>\n  &#8211; \u65b9\u6cd5\uff1a\u5b9e\u9a8c\u5ba4\u5b9a\u6807\u3001\u573a\u5730\u5b9a\u6807\u3001\u673a\u4e0a\/\u661f\u4e0a\u5b9a\u6807<br \/>\n  &#8211; \u516c\u5f0f\uff1a$L_\\lambda =k * DN + c$\uff0c\u5176\u4e2dk\u548cc\u5206\u522b\u662f\u589e\u76ca\u548c\u504f\u79fb,$L_\u03bb$\u662f\u8f90\u5c04\u4eae\u5ea6<br \/>\n&#8211; <strong>\u5927\u6c14\u6821\u6b63<\/strong>\uff08Atmospheric correction\uff09\uff1a\u5c06<strong>\u8868\u89c2\u53cd\u5c04\u7387\uff08\u8f90\u5c04\u4eae\u5ea6\uff09\u8f6c\u6362\u4e3a\u5730\u8868\u5b9e\u9645\u53cd\u5c04\u7387<\/strong><br \/>\n  &#8211; \u76ee\u7684\uff1a\u6d88\u9664\u5927\u6c14\u6563\u5c04\u3001\u5438\u6536\u3001\u53cd\u5c04\u5f15\u8d77\u7684\u8bef\u5dee<br \/>\n  &#8211; \u6709\u7edd\u5bf9\u6821\u6b63\u548c\u76f8\u5bf9\u6821\u6b63\u4e24\u79cd\u65b9\u5f0f<br \/>\n    &#8211; \u7edd\u5bf9\u6821\u6b63\uff1a\u57fa\u4e8e\u8f90\u5c04\u4f20\u8f93\u6a21\u578b\uff08\u5982MORTRAN\u3001LOWTRAN\u3001ATCOR\u30016S\uff09\u3001\u57fa\u4e8e\u7b80\u5316\u8f90\u5c04\u4f20\u8f93\u6a21\u578b\u7684\u9ed1\u6697\u50cf\u5143\u6cd5\u3001\u57fa\u4e8e\u7edf\u8ba1\u5b66\u6a21\u578b\u7684\u53cd\u5c04\u7387\u53cd\u6f14<br \/>\n    &#8211; \u76f8\u5bf9\u6821\u6b63\uff1a\u57fa\u4e8e\u7edf\u8ba1\u7684\u4e0d\u53d8\u76ee\u6807\u6cd5\u3001\u76f4\u65b9\u56fe\u5339\u914d\u6cd5<br \/>\n  &#8211; \u516c\u5f0f\uff1a\u8f90\u5c04\u4f20\u8f93\u6a21\u578b\u7684\u5730\u8868\u53cd\u5c04\u7387\u548c\u8f90\u5c04\u4eae\u5ea6\u4e4b\u7684\u5173\u7cfb\uff1a<br \/>\n    &#8211; $\\rho_\\lambda = \\frac{\u03c0L_\\lambda d^2}{ESUN_\\lambda sin\\theta} $ \u5176\u4e2d\uff0cd\u662f\u592a\u9633\u5730\u7403\u7684\u8ddd\u79bb\uff0c$ESUN_\u03bb$\u662f\u592a\u9633\u8f90\u7167\u5ea6\uff0c$ \\theta$\u662f\u592a\u9633\u9ad8\u5ea6\u89d2<br \/>\n  &#8211; \u662f\u5426\u9700\u8981\u5927\u6c14\u6821\u6b63\uff1a<br \/>\n    &#8211; \u4e0d\u4e00\u5b9a\u9700\u8981\u7684\u573a\u666f\uff1a\u505a\u56fe\u50cf\u8bc6\u522b\u3001\u591a\u5149\u8c31\u7269\u8d28\u8bc6\u522b\u4e0d\u9700\u8981<br \/>\n    &#8211; \u9700\u8981\u7684\u573a\u666f\uff1a\u5149\u8c31\u6307\u6570\u8ba1\u7b97\u3001\u9ad8\u5149\u8c31\u7269\u8d28\u8bc6\u522b\u3001\u9065\u611f\u5b9a\u91cf\u53cd\u6f14<\/p>\n<div class=\"mermaid mermaid-diagram no-emojify\"><script type=\"text\/javascript\">document.write(\"graph LR\\nid0(DN\u503c)--\u8f90\u5c04\u5b9a\u6807--&gt;id1(\u8f90\u5c04\u4eae\u5ea6\u503c)--\u5927\u6c14\u6821\u6b63--&gt;id2(\u5730\u8868\u53cd\u5c04\u7387)\\n\");<\/script><\/div>\n<ul>\n<li><strong>\u592a\u9633\u9ad8\u5ea6\u548c\u5730\u5f62\u6821\u6b63<\/strong>\n<ul>\n<li><strong>\u5730\u5f62\u6821\u6b63<\/strong>\u7684\u76ee\u7684\u662f\u6d88\u9664\u5730\u5f62\u5f15\u8d77\u7684\u8f90\u5c04\u4eae\u5ea6\u8bef\u5dee\uff0c<strong>\u4f7f\u5761\u5ea6\u4e0d\u540c\u4f46\u53cd\u5c04\u6027\u8d28\u76f8\u540c\u7684\u5730\u7269\u5728\u56fe\u50cf\u4e2d\u5177\u6709\u76f8\u540c\u7684\u4eae\u5ea6\u503c<\/strong><\/li>\n<li><strong>\u592a\u9633\u9ad8\u5ea6\u89d2\u6821\u6b63<\/strong>\u7684\u76ee\u7684\u662f<strong>\u901a\u8fc7\u592a\u9633\u5149\u7ebf\u503e\u659c\u7167\u5c04\u65f6\u83b7\u53d6\u7684\u56fe\u50cf\u6821\u6b63\u4e3a\u592a\u9633\u5149\u7ebf\u5782\u76f4\u7167\u5c04\u65f6\u83b7\u53d6\u7684\u56fe\u50cf<\/strong>\uff0c\u4e3b\u8981\u7528\u4e8e\u6bd4\u8f83\u4e0d\u540c\u592a\u9633\u9ad8\u5ea6\u89d2\u7684\u56fe\u50cf\uff0c\u6d88\u9664\u4e0d\u540c\u5730\u65b9\u3001\u4e0d\u540c\u5b63\u8282\u3001\u4e0d\u540c\u65f6\u671f\u56fe\u50cf\u4e4b\u95f4\u7684\u8f90\u5c04\u5dee\u5f02\uff0c\u901a\u5e38\u901a\u8fc7\u8c03\u6574\u56fe\u50cf\u7684\u5e73\u5747\u4eae\u5ea6\u52a0\u4ee5\u5b9e\u73b0\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2>\u51e0\u4f55\u6821\u6b63<\/h2>\n<p>\u8f90\u5c04\u6821\u6b63\u662f\u9488\u5bf9\u56fe\u50cf\u50cf\u7d20\u503c\u7684\u6821\u6b63\uff0c\u51e0\u4f55\u6821\u6b63\u5c31\u662f<strong>\u9488\u5bf9\u56fe\u50cf\u50cf\u7d20\u4f4d\u7f6e\u7684\u6821\u6b63<\/strong>\u3002\u56fe\u50cf\u4f1a\u4ea7\u751f\u51e0\u4f55\u7578\u53d8\uff0c\u8fd9\u662f\u7531\u4e8e<br \/>\n&#8211; \u4f20\u611f\u5668\u5185\u90e8\u56e0\u7d20\uff08\u7531\u4e8e\u900f\u955c\u3001\u63a2\u6d4b\u539f\u4ef6\u3001\u91c7\u6837\u901f\u7387\u3001\u626b\u7784\u955c\u7b49\u5f15\u8d77\u7684\u7578\u53d8\uff09-<br \/>\n&#8211; \u9065\u611f\u5e73\u53f0\u56e0\u7d20\uff08\u7531\u4e8e\u5e73\u53f0\u7684\u9ad8\u5ea6\u3001\u901f\u5ea6\u3001\u8f68\u9053\u504f\u79fb\u53ca\u59ff\u6001\u53d8\u5316\u5f15\u8d77\u7684\u56fe\u50cf\u7578\u53d8\uff09<br \/>\n&#8211; \u5730\u7403\u56e0\u7d20\uff08\u5730\u7403\u81ea\u8f6c\u3001\u5730\u5f62\u8d77\u4f0f\u3001\u5730\u7403\u66f2\u7387\u7b49\uff09<br \/>\n&#8211; \u6295\u5f71\u65b9\u5f0f\u7684\u9009\u62e9\u548c\u5927\u6c14\u6298\u5c04<br \/>\n\u4ee5\u4e0a\u7684\u7b49\u56e0\u7d20\u9020\u6210\u7684\uff0c\u51e0\u4f55\u6821\u6b63\u7528\u4e8e\u5c1d\u8bd5\u4fee\u6b63\u8fd9\u4e9b\u7578\u53d8\u3002<\/p>\n<p>\u51e0\u4f55\u6821\u6b63\u5305\u62ec\u51e0\u4f55\u7c97\u6821\u6b63\u3001\u51e0\u4f55\u7cbe\u6821\u6b63\u3001\u6b63\u5c04\u6821\u6b63<br \/>\n&#8211; <strong>\u51e0\u4f55\u7c97\u6821\u6b63<\/strong>\uff1a\u76f4\u63a5<strong>\u9488\u5bf9\u7578\u53d8\u539f\u56e0\u8fdb\u884c\u7684\u6821\u6b63<\/strong>\uff08\u5982\u56e0\u4e3a\u4f20\u611f\u5668\u9020\u6210\u7684\u3001\u536b\u661f\u59ff\u6001\u3001\u5730\u7403\u66f2\u7387\u3001\u81ea\u8f6c\u7b49\u5f15\u8d77\u7684\uff09\uff0c\u5b83\u4e00\u822c\u7531\u536b\u661f\u63a5\u6536\u7cfb\u7edf\u63d0\u4f9b\uff0c\u7528\u6237\u65e0\u9700\u5904\u7406<br \/>\n&#8211; <strong>\u51e0\u4f55\u7cbe\u6821\u6b63<\/strong>\uff1a\u662f\u6307<strong>\u5229\u7528\u5730\u9762\u63a7\u5236\u70b9\u505a\u7684\u7cbe\u5bc6\u6821\u6b63<\/strong>\uff0c\u51e0\u4f55\u7cbe\u6821\u6b63\u4e0d\u8003\u8651\u5f15\u8d77\u7578\u53d8\u7684\u539f\u56e0\uff0c\u76f4\u63a5\u5229\u7528\u5730\u9762\u63a7\u5236\u70b9\u5efa\u7acb\u8d77\u50cf\u5143\u5750\u6807\u4e0e\u76ee\u6807\u7269\u5730\u7406\u5750\u6807\u4e4b\u95f4\u7684\u6570\u5b66\u6a21\u578b\uff0c\u5b9e\u73b0\u4e0d\u540c\u5750\u6807\u7cfb\u7edf\u4e2d\u50cf\u5143\u4f4d\u7f6e\u7684\u53d8\u6362\u3002<br \/>\n&#8211; <strong>\u6b63\u5c04\u6821\u6b63<\/strong>\uff1a\u6b63\u5c04\u6821\u6b63\u4e0d\u4ec5\u80fd\u591f\u5b9e\u73b0\u5e38\u89c4\u7684\u51e0\u4f55\u6821\u6b63\u529f\u80fd\uff0c\u8fd8\u80fd<strong>\u901a\u8fc7\u6d4b\u91cf\u9ad8\u7a0b\u70b9\u548cDEM\u6765\u6d88\u9664\u5730\u5f62\u8d77\u4f0f\u5f15\u8d77\u7684\u56fe\u50cf\u51e0\u4f55\u7578\u53d8<\/strong>\uff0c\u63d0\u9ad8\u56fe\u50cf\u7684\u51e0\u4f55\u7cbe\u5ea6\u3002\u6b63\u5c04\u6821\u6b63\u7684\u56fe\u50cf\u5177\u6709\u7cbe\u786e\u7684\u7a7a\u95f4\u4f4d\u7f6e\uff0c\u5168\u5e45\u56fe\u50cf\u5177\u6709\u7edf\u4e00\u7684\u6bd4\u4f8b\u5c3a\uff0c\u79f0\u4e3a\u6570\u5b57\u6b63\u5c04\u5f71\u50cf\u3002<\/p>\n<p>\u53c2\u8003\u94fe\u63a5<br \/>\n<a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/blog.csdn.net\/qq_32649321\/article\/details\/111158708\">\u7406\u89e3\u8f90\u5c04\u6821\u6b63\u3001\u8f90\u5c04\u5b9a\u6807\u3001\u5927\u6c14\u6821\u6b63\u5173\u7cfb<\/a><br \/>\n<a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/www.zhihu.com\/question\/438245884\">\u4ec0\u4e48\u65f6\u5019\u9700\u8981\u5bf9\u9065\u611f\u5f71\u50cf\u8fdb\u884c\u8f90\u5c04\u6821\u6b63\u5904\u7406<\/a><br \/>\n<a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/zhuanlan.zhihu.com\/p\/550797760\">\u9065\u611f\u5f71\u50cf\u51e0\u4f55\u6821\u6b63<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u57fa\u7840\u77e5\u8bc6 DN\u503c\uff08Digital Number\uff09 \u56fe\u50cf\u50cf\u7d20\u503c\uff0c\u5373\u4f20\u611f\u5668\u5f97\u5230\u7684\u6570\u5b57\u6d4b\u91cf\u503c\u3002\u5176\u4ed6\u5927\u5c0f\u4e0e\u4f20\u611f\u5668\u7684\u8f90\u5c04&hellip;<a href=\"https:\/\/www.notown.top\/?p=729\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">\u8f90\u5c04\u6821\u6b63\u3001\u8f90\u5c04\u5b9a\u6807\u3001\u5927\u6c14\u6821\u6b63\u540d\u8bcd\u68b3\u7406<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[21],"tags":[],"class_list":["post-729","post","type-post","status-publish","format-standard","hentry","category-21"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/729","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=729"}],"version-history":[{"count":2,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/729\/revisions"}],"predecessor-version":[{"id":731,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/729\/revisions\/731"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=729"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=729"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=729"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}