{"action":"created","issue":{"url":"https://api.github.com/repos/terraref/reference-data/issues/30","repository_url":"https://api.github.com/repos/terraref/reference-data","labels_url":"https://api.github.com/repos/terraref/reference-data/issues/30/labels{/name}","comments_url":"https://api.github.com/repos/terraref/reference-data/issues/30/comments","events_url":"https://api.github.com/repos/terraref/reference-data/issues/30/events","html_url":"https://github.com/terraref/reference-data/issues/30","id":153504442,"number":30,"title":"How to calculate downwelling spectral radiances","user":{"login":"dlebauer","id":464871,"avatar_url":"https://avatars.githubusercontent.com/u/464871?v=3","gravatar_id":"","url":"https://api.github.com/users/dlebauer","html_url":"https://github.com/dlebauer","followers_url":"https://api.github.com/users/dlebauer/followers","following_url":"https://api.github.com/users/dlebauer/following{/other_user}","gists_url":"https://api.github.com/users/dlebauer/gists{/gist_id}","starred_url":"https://api.github.com/users/dlebauer/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/dlebauer/subscriptions","organizations_url":"https://api.github.com/users/dlebauer/orgs","repos_url":"https://api.github.com/users/dlebauer/repos","events_url":"https://api.github.com/users/dlebauer/events{/privacy}","received_events_url":"https://api.github.com/users/dlebauer/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"czender","id":5597049,"avatar_url":"https://avatars.githubusercontent.com/u/5597049?v=3","gravatar_id":"","url":"https://api.github.com/users/czender","html_url":"https://github.com/czender","followers_url":"https://api.github.com/users/czender/followers","following_url":"https://api.github.com/users/czender/following{/other_user}","gists_url":"https://api.github.com/users/czender/gists{/gist_id}","starred_url":"https://api.github.com/users/czender/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/czender/subscriptions","organizations_url":"https://api.github.com/users/czender/orgs","repos_url":"https://api.github.com/users/czender/repos","events_url":"https://api.github.com/users/czender/events{/privacy}","received_events_url":"https://api.github.com/users/czender/received_events","type":"User","site_admin":false},"milestone":null,"comments":14,"created_at":"2016-05-06T17:52:37Z","updated_at":"2016-05-18T16:41:33Z","closed_at":null,"body":"Currently the spectral radiances are uncalibrated, and provided in the environmental logger as:\r\n\r\n```\r\n    \"spectrometer\": {\r\n      \"maxFixedIntensity\": \"16383\",\r\n      \"integration time in ?s\": \"5000\",\r\n      \"band\": {\r\n        \"wavelength\": 337.70483,\r\n        \"spectrum\": 1500.0\r\n      },\r\n      \"band\": {\r\n        \"wavelength\": 338.16013791719934,\r\n        \"spectrum\": 1500.0\r\n      },\r\n      \"band\": {\r\n        \"wavelength\": 338.61548740418232,\r\n        \"spectrum\": 1503.0\r\n      },\r\n      \"band\": {\r\n        \"wavelength\": 339.07087845402685,\r\n        \"spectrum\": 1500.0\r\n      }, ...\r\n```\r\n\r\nfrom \r\n[2016-04-13_00-38-15_environmentlogger.zip](https://github.com/terraref/reference-data/files/252642/2016-04-13_00-38-15_environmentlogger.zip)\r\n\r\nCalibration files are in EnvironmentLogger/CalibrationData/ \r\n[Calibrations.zip](https://github.com/terraref/reference-data/files/250620/Calibrations.zip)\r\n\r\nThe output of the spectrometer is 'raw' counts.\r\n\r\n@TinoDornbusch in #26 you wrote\r\n\r\n> You need to use the attached calibration files to convert it to units of µW m-2 s-1. Careful you need to  take the bandwidth of the chip into account (0.4nm) if you want to convert to µmol m-2 s-1.\r\n\r\nCould you or @markus-radermacher-lemnatec please clarify, and provide an equation for converting the information in the calibration files to reflectances?"},"comment":{"url":"https://api.github.com/repos/terraref/reference-data/issues/comments/220086393","html_url":"https://github.com/terraref/reference-data/issues/30#issuecomment-220086393","issue_url":"https://api.github.com/repos/terraref/reference-data/issues/30","id":220086393,"user":{"login":"TinoDornbusch","id":18658877,"avatar_url":"https://avatars.githubusercontent.com/u/18658877?v=3","gravatar_id":"","url":"https://api.github.com/users/TinoDornbusch","html_url":"https://github.com/TinoDornbusch","followers_url":"https://api.github.com/users/TinoDornbusch/followers","following_url":"https://api.github.com/users/TinoDornbusch/following{/other_user}","gists_url":"https://api.github.com/users/TinoDornbusch/gists{/gist_id}","starred_url":"https://api.github.com/users/TinoDornbusch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/TinoDornbusch/subscriptions","organizations_url":"https://api.github.com/users/TinoDornbusch/orgs","repos_url":"https://api.github.com/users/TinoDornbusch/repos","events_url":"https://api.github.com/users/TinoDornbusch/events{/privacy}","received_events_url":"https://api.github.com/users/TinoDornbusch/received_events","type":"User","site_admin":false},"created_at":"2016-05-18T16:41:33Z","updated_at":"2016-05-18T16:41:33Z","body":"@dlebauer We have no technical documentation of Ocean Optics. I ask for it.\r\n\r\n"}}