Landsat 8 Definitive Ephemeris

Definitive Ephemeris information (DE) is used for geometrically correcting Landsat data and can provide improved accuracy over the spacecraft generated ephemeris. Landsat 8 Definitive Ephemeris files are available two days after acquisition.

Landsat 8 DE files are now available for 2024-present. Visit Definitive Ephemeris to learn more information about L8 DE files or to access DE files for Landsat 7.

Below, you can select the year and download the selected file.