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originally posted by: PublishedShadow
Sorry for the length of this post.
Like I said earlier, I’ve been doing A LOT of digging and I wanted to share something else I've dug up over the past couple of days. It’s probably nothing, could be something - who knows - but it helps no one just sitting in my head.
We know that the Sunspot Observatory was shut down on September 6th, so, like I’m sure many people did, I went to heliosviewer.org to look at any data I thought might be relevant.
Unsurprisingly, on most of the instruments, there’s no data for the dates of September 5th through September 10th. The oddest thing to me was the lack of SDO/AIA data. In the month of August, the AIA has 2000+ images per day. Then we have nothing for September 1st or 2nd. Then 2400 Images on the 3rd and 2025 on the 4th. Then no AIA data again until September 10th.
So, for S&Gs I went directly to NASA’s SDO archives ( sdo.gsfc.nasa.gov... ) and put in the following dates at 1024 resolution since it was the first date missing from heliosviewer:
I encourage you to check it out, it’s 95 Images once it loads and what stands out to me is at 6:40:58 UT until 6:56:22 UT. You can use any measurement as long as it’s AIA.
It could be anything (or nothing), but it’s there for at least 16 minutes before it goes out of view. I mean, if the SDO picks up the moon passing in view based on what we saw on the 9th, we know that the AIA does at least see objects that passes its view but what we see here could just be a technical issue. I can’t say because I’m not an expert on the matter.
Now for the fun part. I also went to the national solar observatory edu site, and checked out their historical data.
I went to the main NSO FTP site( ftp.nso.edu...)
On the nisp directory, the date modified is 9/5/18 at 6:51:00 AM. After digging through subdirectories, I can’t find any folder, file, or any other data with that time stamp - which tells me that something within the nisp directory was deleted or moved - thus the “last modified”.
Now, I’m not sure if the time on the FTP is universal time, but if it is, it’s pretty odd that something gets deleted from their archive and just so happens to coincide in the general time of what I pointed out above.. THEN the site where NISP data originates from (if I read the NSO website correctly) subsequently closes the next day?
Welcome to my Rabbit Hole.