GBO_ASI_BROWSER.HELP 2007-03-07 (Harald Frey, hfrey@ssl.berkeley.edu)

This interface is intended to allow the quick browsing through the available 
data from the THEMIS GBO all-sky imagers. There are data from 2006-01-01 to 
about two days before the time you are actually running it.

First select a particular day by either typing it into the "Select Date" window, 
or by using the Calendar option.

Then select either "Summary", "Keogram", or "Average" and press "Start".

The option "Summary" shows a pre-created gif-image for that particular day with 
the full hours running left to right, and the 20 THEMIS GBO stations running 
from top to bottom with the westernmost station on top and the easternmost 
station at the bottom. A small image is shown if for a particular hour there 
are data from that station. The very latest plots are generally made from 
thumbnail images that were transmitted from the stations in real-time. A "T" at 
the very right of the image identifies the small images as coming from thumbnail 
data. If there is no "T" then the images come from full-resolution images. 
Starting in January 2007 the real-time transmitted thumbnails are no real 
all-sky images anymore but rather rasters of the original images into a square 
geomagnetic grid.

The "Keogram" option will show daily keograms that will present slightly more 
detail about the aurora then the thumbnails.

The "Average" option will show a series of images that were created by averaging 
full-resolution images for a minute at the GBO site and transmitted, one per 
hour with only a short delay. These images were intended for engineering 
purposes to allow good assessment of the camera and observing conditions e.g  
clear skies, clouds, or snow on the dome.

By clicking on either of the small images or a particular part of the 
keogram will show images for that hour in one-minute time steps. Clicking on one 
of these images will get the user one more level down to images at 3-6 seconds 
resolution.

The top option in "<<  >>" allows the stepping forward and back in time.

Clicking at any of the daily hours in the top-level display will show mosaic 
images for that hour. 

More information about the GBOs can be found under the link "Information about 
the THEMIS GBO stations".

Please follow the rules-of-the-road and before publishing any of these data 
contact either of the following:
THEMIS-PI Vassilis Angelopoulos, vassilis@ssl.berkeley.edu
THEMIS CoI Stephen Mende, mende@ssl.berkeley.edu
Eric Donovan, edonovan@ucalgary.ca