Mathematical corrections have been applied to account for areal distortion due to polar projection of original charts. Southern Hemisphere snow cover included here is only for South America because the grid size is too coarse to accurately digitize snow cover in Australia, New Zealand or Africa.
Data are available on diskette or via anonymous ftp.
Satellite observations of variations in Southern Hemisphere snow cover. For more information, to order data on diskettes, or arrange ftp, please contact user services .