| |
| |
GONG Farside Images |
 | | As the Sun rotates with a period of appproximately 27 days, the farside of the Sun moves across the longitude ― sine of latitude projection of the entire Sun - 360 of longitude and 180 of latitude - which uses what is known as the Carrington coordinate system. |
 | | Additionally, each farside map is marked with a Quality value, a number from 0 to 1 which represents the fraction of the 1440 minutes used by each map for which we have good data. |
 | | The method for estimating far-side magnetic activity was developed by Charles Lindsey and Doug Braun of Colorado Research Associates, a division of Northwest Research Associates, Boulder, Colorado. |
| gong.nso.edu /data/farside (379 words) |
|