Guest Viktor Nilsson Posted August 27, 2015 Share Posted August 27, 2015 Hi! I've a question regarding the 30 minute aurora forecast data from NOAA ( http://www.swpc.noaa.gov/products/aurora-30-minute-forecast )I'm downloading the data for this, which I fetch from http://services.swpc.noaa.gov/text/aurora-nowcast-map.txt , but I'm a little bit confused if the coordinates that should used for this should be geographic coordinates or geomagnetic coordinates. I have sent emails to NOAA but never received a reply, so if any of you guys would know, I would love to here!Best regards,Viktor Link to comment Share on other sites More sharing options...
Vancanneyt Sander Posted August 28, 2015 Share Posted August 28, 2015 The answer is in the file: # 1096 values covering 0 to 360 degrees in the horizontal (longitude) direction (0.32846715 degrees/value) # 512 values covering -90 to 90 degrees in the vertical (latitude) direction (0.3515625 degrees/value) You'll just have to calculate which field is appropriate for you location.To make it convenient we have on our website many locations in our list with the percentages. Easier than cruising in that file Link to comment Share on other sites More sharing options...
Guest Viktor Nilsson Posted August 29, 2015 Share Posted August 29, 2015 Thank you very much for your answer!Yes I already found this information but it doesn't state if the longitude and latitude are geographic or geomagnetic coordinates. Sorry for not being clear enough in my question.So do you use "normal" GPS-coordinates, or do you convert them to geomagnetic first? Link to comment Share on other sites More sharing options...
Marcel de Bont Posted August 31, 2015 Share Posted August 31, 2015 Geographical coordinates, like GPS. Link to comment Share on other sites More sharing options...
Guest Viktor Nilsson Posted August 31, 2015 Share Posted August 31, 2015 Ok great! Makes it a bit easier then! Thank you both for the answers! Link to comment Share on other sites More sharing options...
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