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- W2039012451 abstract "The Remote Sensing Group (RSG) at the University of Arizona has performed high-accuracy radiometric calibration inthe laboratory for more than 20 years in support of vicarious calibration of space-borne and airborne imaging sensors.Typical laboratory calibration relies on lamp-based sources which, while convenient to operate and control, do notsimulate the solar spectrum that is the basic energy source for many of the imaging systems. Using the sun as a sourcefor preflight radiometric calibration reduces uncertainties caused by the spectral mismatch between the preflight andinflight calibration, especially in the case in which a solar diffuser is the inflight calibration method. Difficulties in usingthe sun include varying atmospheric conditions, changing solar angle during the day and with season, and ensuringtraceability to national standards. This paper presents several approaches using the sun as a radiometric calibrationsource coupled with the expected traceable accuracies for each method. The methods include direct viewing of the solardisk with the sensor of interest, illumination of the sensor's inflight solar diffuser by the sun, and illumination of anexternal diffuser that is imaged by the sensor. The results of the error analysis show that it is feasible to achieve preflightcalibration using the sun as a source at the same level of uncertainty as those of lamp-based approaches. The erroranalysis is evaluated and compared to solar-radiation-based calibrations of one of RSG's laboratory-grade radiometers." @default.
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- W2039012451 date "2008-08-28" @default.
- W2039012451 modified "2023-09-27" @default.
- W2039012451 title "Accuracy assessment for the radiometric calibration of imaging sensors using preflight techniques relying on the sun as a source" @default.
- W2039012451 doi "https://doi.org/10.1117/12.795681" @default.
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