{"title":"计算日长。","authors":"J S Amthor","doi":"10.1093/bioinformatics/13.4.479","DOIUrl":null,"url":null,"abstract":"where /is is the hour angle of the Sun (angular distance from the meridian of a site in radians) at sunset. Sunrise and sunset are not exactly symmetrical about the time that the Sun reaches a local meridian, but for biological simulation purposes the symmetry implicit in equation (1) is acceptable. The geometric equation for sin a (where a is solar elevation) can be rearranged to find hs as follows:","PeriodicalId":77081,"journal":{"name":"Computer applications in the biosciences : CABIOS","volume":"13 4","pages":"479-80"},"PeriodicalIF":0.0000,"publicationDate":"1997-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/bioinformatics/13.4.479","citationCount":"2","resultStr":"{\"title\":\"Calculation of daylength.\",\"authors\":\"J S Amthor\",\"doi\":\"10.1093/bioinformatics/13.4.479\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"where /is is the hour angle of the Sun (angular distance from the meridian of a site in radians) at sunset. Sunrise and sunset are not exactly symmetrical about the time that the Sun reaches a local meridian, but for biological simulation purposes the symmetry implicit in equation (1) is acceptable. The geometric equation for sin a (where a is solar elevation) can be rearranged to find hs as follows:\",\"PeriodicalId\":77081,\"journal\":{\"name\":\"Computer applications in the biosciences : CABIOS\",\"volume\":\"13 4\",\"pages\":\"479-80\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1997-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1093/bioinformatics/13.4.479\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computer applications in the biosciences : CABIOS\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1093/bioinformatics/13.4.479\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computer applications in the biosciences : CABIOS","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1093/bioinformatics/13.4.479","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
where /is is the hour angle of the Sun (angular distance from the meridian of a site in radians) at sunset. Sunrise and sunset are not exactly symmetrical about the time that the Sun reaches a local meridian, but for biological simulation purposes the symmetry implicit in equation (1) is acceptable. The geometric equation for sin a (where a is solar elevation) can be rearranged to find hs as follows:
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