Characterization, calibration and operation of a hyperspectral sky imager

Abstract

The thesis describes the development of a highly automated hyperspectral radiance measurement device and all the needed steps to go from measuring the environment until high quality data in reasonable units is available. Characterization and calibration following standard procedures is included but also important new refinements including correction of sensor nonlinearity which considerably improve the data quality and reliability have been added. As far as possible, all potential sources of measurement errors and system failures are identified and reasonable countermeasures have been implemented. Additionally, the foundation for a fast approximative analytic sky model for forward and inverse calculation of clear sky radiance has been developed and compared with measurement data.