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Can someone point me to a document, link, or reference that would get me started accessing the geomagnetic and solar data referenced below. I’m looking for data for the past five years. I have MATLAB, I have used SQL, and have no idea what IDL is. I can click the links and save some files, but then I’m lost.
Thanks and 73,
Bob, WK2Y
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Thank you. I’m always willing to avoid pain.
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That definitely gets me started. Thank you!
From: David Themens <david....@gmail.com>
Sent: Monday, August 16, 2021 1:36 PM
To: ham...@googlegroups.com; Bob Gerzoff <b...@bobgerzoff.com>
Subject: Re: [HamSCI] K9LA propagation tutorial - dead links
Hi,
I manage that website, so I can probably help you out.
Those files all contain the same data, just for use in different programming languages (trying to be helpful in providing data in a bunch of different formats for people, hahaha). The Matlab_DB.mat file, for example, is just a Matlab save file with a structure inside. You can open the file using load(Matlab_DB.mat) (or double clicking it if Matlab is the designated default opener for that file format on your system).
The data in the structure (under the variable name "data") is organized relatively straightforwardly, where there are time variables in the structure in Julian Date format for each time resolution of index.
To convert any of these times into the Matlab datetime object format (Matlab's preferred time variable format) you can use:
times = datetime(data.hourly_jd,'convertfrom','juliandate');
That hourly time variable is used with the AE, PC, and DST indices.
The threehour_jd time variable is used with the Kp index and ap index (mistakenly labelled as capitalized in the structure).
The daily_jd time variable is used with the F107, F10_27 (27-day smoothed F10.7), and F107_81 (81-day smoothed F10.7 flux).
The monthly_jd time variable is used with the IG index.
Please note, there are indices called API, AP8, DSTI, and PCI. Please ignore these indices, as they are time-integrated versions that are used for my model but aren't useful for most users.
Also, please note that the F10.7 flux variables include the NOAA F10.7 flux forecast for any date after the date on which the database was updated.
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Capt Gerry Creager, CAP
SWR Health Services Officer(C) 979.229.5301
Civil Air Patrol, U.S. Air Force Auxiliary
gocivilairpatrol.com
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Capt Gerry Creager, CAP
SWR Health Services Officer(C) 979.229.5301
Civil Air Patrol, U.S. Air Force Auxiliary
gocivilairpatrol.com
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Capt Gerry Creager, CAP
SWR Health Services Officer(C) 979.229.5301
Civil Air Patrol, U.S. Air Force Auxiliary
gocivilairpatrol.com
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