A vast amount of useful and informative material relating to the appearance of the sun at different wavelengths, visual and instrumental observation, and analyses and records of sunspot data are available via the Internet. The list below is intended to provide the new observer with some initial points of contact with this resource. Some entries in the list present the full address required to get to a specific display or table.
February 20, 2013
- The NASA SDO mission released a fascinating video showing "rain" from a magnetic loop falling back onto the surface of the Sun. It's not rain, but hot plasma magnetically levitated off the Sun!
February 15, 2013
Here are a number of solar photographs obtained by AAVSO solar observers over many years. Thanks to all of the photographers for sharing their images with us!
Atmospheric Seeing Conditions
Contributed by Tom Fleming (FLET)
Reports and observations submitted to the AAVSO use the following ratings for atmospheric turbulence (Seeing): Poor, Fair, Good and Excellent.
SOLAR REPORTING FORM The sunspot reporting form below has been created with a variation of the SUNKEY.exe program and embodies the information and column/character alignments required by the AAVSO Solar Division data processing software. It can be used by any observer who has previously sent an email report to the Division using SUNKEY.exe or the regular-mail paper report.
Spreadsheet for Calculation of Ra and Ri Statistics
The spreadsheet below was developed by William Wilson (WILW), a solar observer who regularly contributes his observations to the AAVSO's Solar Division. It enables the user to compare his/her R-numbers to the Ra numbers reported by the Division and to the SIDC International Index (Ri). The spreadsheet was prepared Excel 97/98/2000/2001 and will open in the PC or Mac programs in that series, since the file format is the same for all of them.
Plans for Visual Solar Spectroscope - by Gerald P. Dyck
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Gerald P. Dyck
Click any image to enlarge.
Reducing Data Gathered by VLF Monitoring Systems
(Extracted from SID Technical Bulletin Vol. 3, Number 4, Oct. 1992)
The reduction process is quite simple, and consists of the steps which follow. First, the universal time for each of three event-phases must be measured for each SID. Examples are indicated on the recording at the end of this report.