The currently recommended ESUN values (in W/m2/μm) are listed in the table below. These values used with Landsat products currently generated at EROS ensure consistent radiometric calibration of data from all these sensors. Note that although the data are consistently calibrated, calculated TOA reflectance over the same target may differ among the sensors due to the spectral bandpass differences.
|Band #||Landsat 7 ETM+||Landsat 5 TM||Landsat 4 TM||Landsat 1-5 MSS|
The Landsat 5 MSS values are used for all MSS instruments. This was the result of cross-calibration of all the MSS sensors to match the Landsat 5 instrument.
All ESUN values are derived from the ChKur spectrum. The ChKur spectrum is the combined Chance-Kurucz Solar Spectrum within MODTRAN 5 (2011, Berk, A., Anderson, G.P., Acharya, P.K., Shettler, E.P., MODTRAN 184.108.40.206 User's Manual).
Future plans call for the cross-calibration of all Landsat sensors to the Landsat 8 OLI directly in TOA reflectance.