[White Paper] TOA Radiance Reflectance Conversion of KOMPSAT Imagery
SI Imaging Services
|1. DN to TOA reflectance conversion of KOMPSAT Imagery
The top-of-atmosphere(TOA) reflectance is an important physical value to compare products from different sensors. In this document, the methodology to convert digital number (DN) of KOMPSAT imagery to TOA reflectance is explained and related parameters are given.
2. KOMPSAT-3 parameters
Following table shows Gain to be used for the calculation of TOA radiance from DN of KOMPSAT-3 imagery updated through filed campaign in 2014 and ESUN to be used for TOA reflectance calculation. The Offset for each band equals to zero due to dark current compensation.
Table 1. Gain and ESUN for KOMPSAT-3 (2014)
3. KOMPSAT-2 parameters
Following tables show Gain to be used for the calculation of TOA radiance from DN of KOMPSAT-2 imagery and ESUN to be used for TOA reflectance calculation.
Table 2. Gain and ESUN for KOMPSAT-2 (TDI High)
For more details, please find attached PDF file.