Atmospheric data is available from 1 March 2000 to the present (updated nightly). If you request atmospheric correction parameters for a date before Mar 1, 2000, you will get an error message.

Older atmospheric data will be added to this site as the tool grows. Submit your email address in the box below if you would like to be informed when new data is added.

A text file of actual holdings is located here. Any date listed in this file will be processable in the Parameter Calculator.