{"action":"opened","issue":{"url":"https://api.github.com/repos/pvlib/pvlib-python/issues/125","repository_url":"https://api.github.com/repos/pvlib/pvlib-python","labels_url":"https://api.github.com/repos/pvlib/pvlib-python/issues/125/labels{/name}","comments_url":"https://api.github.com/repos/pvlib/pvlib-python/issues/125/comments","events_url":"https://api.github.com/repos/pvlib/pvlib-python/issues/125/events","html_url":"https://github.com/pvlib/pvlib-python/issues/125","id":135876062,"number":125,"title":"doc: how to get dhi & bni","user":{"login":"dacoex","id":8660305,"avatar_url":"https://avatars.githubusercontent.com/u/8660305?v=3","gravatar_id":"","url":"https://api.github.com/users/dacoex","html_url":"https://github.com/dacoex","followers_url":"https://api.github.com/users/dacoex/followers","following_url":"https://api.github.com/users/dacoex/following{/other_user}","gists_url":"https://api.github.com/users/dacoex/gists{/gist_id}","starred_url":"https://api.github.com/users/dacoex/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dacoex/subscriptions","organizations_url":"https://api.github.com/users/dacoex/orgs","repos_url":"https://api.github.com/users/dacoex/repos","events_url":"https://api.github.com/users/dacoex/events{/privacy}","received_events_url":"https://api.github.com/users/dacoex/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":0,"created_at":"2016-02-23T21:46:05Z","updated_at":"2016-02-23T21:46:05Z","closed_at":null,"body":"`pvlib.clearsky.ineichen` produces \r\n\r\n* GHI \r\n* DHI \r\n* BNI\r\n\r\nIt is not yet documented, how the non-clear-sky diffuse horizontal and direct horizontal components are derived.\r\nSay, \r\n\r\nI checked the tutorials. Either DHI is included in the TMY files or the DHI of clear-sky is used.\r\n\r\nIf my understanding is am correct, there is no procedure for deriving actual dhi, e.g. during overcast conditions, from a timerseries of GHI.\r\nThe same applies for bhi\r\n\r\nMaybe a matrix wich function for converting which irradiance value from which start value using which function would be nice to have that overview."}}