Developing metadata-based automatic conversion program from digital number to spectral brightness, reflectance and brightness temperature for Landsat data
2015
Okamoto, K. (National Institute for Agro-Environmental Sciences (Japan))
The conversion program DN2RRT4TO8 was developed to convert the Landsat Thematic Mapper (TM)/Enhanced Thematic Mapper Plus (ETM+)/Operational Land Imager (OLI)-Thermal Infrared Sensor (TIRS) data from digital number (DN) to at-sensor spectral radiance (assRad), top-of-atmosphere reflectance (toaRef) and at-sensor brightness temperature (asbTem). The DN2RRT4TO8 can prevent mistyping conversion parameters by an operator because necessary parameters are automatically input from an ancillary information (metadata) file. For example, using the ERDAS/IMAGINE, an image processing software, the conversion time required from DN to assRad, toaRef and asbTem is on the average 20 minutes a scene, but the DN2RRT4TO8 on the average 14 minutes. The DN2RRT4TO8 is under some restrictions, but can reduce the time converting data and errors in inputting conversion parameters. Moreover, using batch processing, data conversion can run as a background process.
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