Download Definitive Ephemeris for Landsat 7 and Landsat 5

Definitive Ephemeris is used for geometrically correcting Landsat data, and provides improved accuracy over predicted ephemeris. More details on Definitive Ephemeris can be found at http://landsat.usgs.gov/what_is_definitive_ephemeris.php.

Definitive Ephemeris files are available two days after acquisition, and can be accessed by choosing one of the options below:

Option 1 - Search a single date
Option 2 - Search for multiple dates (up to 10)
Option 3 - Search within a data range