Calculation of the Static In-Flight Telescope-Detector Response by Deconvolution Applied to Point-Spread Function for the Geostationary Earth Radiation Budget experiment

Details Calculation of the Static In-Flight Telescope-Detector Response by Deconvolution Applied to Point-Spread Function for the Geostationary Earth Radiation Budget experiment Calculation of the Static In-Flight Telescope-Detector Response by Deconvolution Applied to Point-Spread Function for the Geostationary Earth Radiation Budget experiment

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apopt..43.6313m&link_type=abstract

Applied Optics IP, vol. 43, Issue 34, pp.6313-6322

Physics

Optics

Scientific paper

The Geostationary Earth Radiation Budget (GERB) experiment is a broadband satellite radiometer instrument program intended to resolve remaining uncertainties surrounding the effect of cloud radiative feedback on future climate change. By use of a custom-designed diffraction-aberration telescope model, the GERB detector spatial response is recovered by deconvolution applied to the ground calibration point-spread function (PSF) measurements. An ensemble of randomly generated white-noise test scenes, combined with the measured telescope transfer function results in the effect of noise on the deconvolution being significantly reduced. With the recovered detector response as a base, the same model is applied in construction of the predicted in-flight field-of-view response of each GERB pixel to both short- and long-wave Earth radiance. The results of this study can now be used to simulate and investigate the instantaneous sampling errors incurred by GERB. Also, the developed deconvolution method may be highly applicable in enhancing images or PSF data for any telescope system for which a wave-front error measurement is available.

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