The files that are sent to ALPO for inclusion in the galleries should follow a few basic rules to help ensure their indexing^[i] and upload in a timely manner. Files should be attached, not embedded or using hyperlinks, with the email sent to the section’s email address. The preferred file naming is as follows:

2022-03-29 -1543 _4 -HwEsk -CaK

1. The date and time of the observation expressed in UT
   1. 4-digit year <hyphen> 2-digit month <hyphen> 2-digit day 2022-03-29
   2. <hyphen> 2-digit hour in 24 hour format followed by 2-digit minutes
      (NO colon between hours and minutes) -1543
   3. If you wish to record seconds, express it in tenths of a minute preceded by an underscore _4
2. Your initials in some manner, preceded by a hyphen -HwEsk
3. The filter used -CaK 
   1. If no filter, WL is appropriate for “White Light”
   2. If you created a color image by taking red, green, and blue images that are combined to a final product then RGB is the correct value to use
   3. If multiple filters are used list them with intervening hyphens

If for some reason you must use a non- ISO 8601 standard for your UT date (i.e., something other than YYYY-MM-DD) then we require two things:

1. It must be numeric; do NOT list a month using alpha characters such as SEP or APRIL
2. You must be consistent, using that format for all your observations, regardless of target

Only static JPG and PNG image files are accepted for processing. You can find free, online resources to convert almost any other format to either of these accepted types (e.g., https://convert.io/image-converter )

Due to the large size of animated GIF files, we are currently unable to host these on the website. We hope to be able to handle them in the near future.

Maximum File Size

Because disk space on a web server is not free, we must cap the file size at approximately 400 KB. The compression algorithms for JPG files are very effective and can produce excellent results with negligible loss of detail. Files exceeding this threshold may be rejected.

Your image should have text annotation on it to assist anyone who is subsequently examining it to facilitate understanding what was observed and how it was captured. While some of this information is also present in the file name, having it visible on the image ensures its permanent association with your observation (file names could change). It is especially important when submitting a close-up of an active region (AR) on the Sun that you specify which AR we are looking at in your image or sketch. If you are capturing a prominence or filament without any AR in the frame, you need to include cardinal directions to orient the viewer (e.g., Prominence – NE, or Filament – SW). Other important information would include:

• The name of the object
• The observation date & time in UT
• Your name
• The telescope used

Many observers include additional details like those listed below. As a general rule, the more information you document on the image, the more valuable it can be.

• Your location ( required  for Eclipse submissions )
• The imaging equipment used
• The central meridian values for the planet at that time
• Filter used

Your observations should always be sent to the addresses listed below to ensure that they are forwarded to the appropriate section coordinators and volunteers who prepare them for the gallery.