Drax Spacex Posted October 14, 2021 Share Posted October 14, 2021 Is the Carrington longitude coordinate for active regions stored in the spaceweatherlive archives? Carrington longitude is useful for determining the persistence of an active region over multiple rotations. I only find Stonyhurst Coordinates. The SWPC Solar Region Summary records in the "Lo" column the Carrington longitude for each active region. Carrington longitude can also be calculated from Stonyhurst longitude given the daily value of Lt (the current Carrington longitude line) which is handwritten on the daily SWPC Solar Synoptic Map. Lt is likely also available from other sources, and could even be calculated for any given date and time using the right formula/algorithm. Link to comment Share on other sites More sharing options...
3gMike Posted October 15, 2021 Share Posted October 15, 2021 7 hours ago, Drax Spacex said: Is the Carrington longitude coordinate for active regions stored in the spaceweatherlive archives? Carrington longitude is useful for determining the persistence of an active region over multiple rotations. I only find Stonyhurst Coordinates. I'm not aware of it in the archive, so I use a site called Helio HEC, provided by University College London. I am unable to submit a link as it is not a secure site, but a Google search should bring it up. Just update the text in the box at the top of the page to enter the AR number you are looking for, then press submit. 1 Link to comment Share on other sites More sharing options...
Drax Spacex Posted October 15, 2021 Author Share Posted October 15, 2021 13 hours ago, 3gMike said: I'm not aware of it in the archive, so I use a site called Helio HEC, provided by University College London. I am unable to submit a link as it is not a secure site, but a Google search should bring it up. Just update the text in the box at the top of the page to enter the AR number you are looking for, then press submit. I tried a google search and found something called Helio HEC GUI but I don't think it's the same thing. The search field there is for catalog name match. Link to comment Share on other sites More sharing options...
3gMike Posted October 16, 2021 Share Posted October 16, 2021 12 hours ago, Drax Spacex said: I tried a google search and found something called Helio HEC GUI but I don't think it's the same thing. The search field there is for catalog name match. It should look like this 1 Link to comment Share on other sites More sharing options...
Drax Spacex Posted October 16, 2021 Author Share Posted October 16, 2021 Ah - found it. At bottom of the landing page for "Helio HEC" is a Free SQL search link - that's where I needed to be. Good collection of data. Thanks! Link to comment Share on other sites More sharing options...
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