{"id":9896,"date":"2025-07-20T20:19:42","date_gmt":"2025-07-20T12:19:42","guid":{"rendered":"https:\/\/tommykwan.com\/blog\/?p=9896"},"modified":"2025-07-20T20:19:42","modified_gmt":"2025-07-20T12:19:42","slug":"calculation-of-freezing-height","status":"publish","type":"post","link":"https:\/\/tommykwan.com\/blog\/aviation\/calculation-of-freezing-height\/","title":{"rendered":"Calculation of Freezing Height"},"content":{"rendered":"<p><strong>The Bradbury Rule<\/strong><\/p>\n<p>Example: OAT 10 degree C ; DP 7 degree C<\/p>\n<ol>\n<li>Calculate Cloud Base<br \/>\nT &#8211; DP * 400 = (10-7) * 400 = 1200 feet AGL<\/li>\n<li>Calculate Freezing layer<br \/>\nDP \/ 1.8 * 1000 = 7\/1.8 * 1000 = 3889 feet AGL<\/li>\n<li>Freezing height<br \/>\n1200 + 3889 = 5089 feet AGL<\/li>\n<\/ol>\n<p>This calculation method is on the basis that below Cloud Base is using DALR ; After cloud base, the temperature will be starting from Dew point temperature and using SALR (avg 1.8 degree C \/1000 feet). This rule of thumb is found by the glider pilot\/meteorologist Tom Bradbury.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Bradbury Rule Example: OAT 10 degree C ; DP 7 degree C Calculate Cloud Base T &#8211; DP * 400 = (10-7) * 400 = 1200 feet AGL Calculate Freezing layer DP \/ 1.8 * 1000 = 7\/1.8 * 1000 = 3889 feet AGL Freezing height 1200 + 3889 = 5089 feet AGL This<a class=\"read-more \" href=\"https:\/\/tommykwan.com\/blog\/aviation\/calculation-of-freezing-height\/\" title=\"Read More\"> <span class=\"button default\">Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64,72],"tags":[],"class_list":["post-9896","post","type-post","status-publish","format-standard","hentry","category-aviation","category-meteorology"],"_links":{"self":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/comments?post=9896"}],"version-history":[{"count":1,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9896\/revisions"}],"predecessor-version":[{"id":9897,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/posts\/9896\/revisions\/9897"}],"wp:attachment":[{"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/media?parent=9896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/categories?post=9896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tommykwan.com\/blog\/wp-json\/wp\/v2\/tags?post=9896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}