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26 September 2014 Assessment of on-orbit crosstalk impact for SNPP VIIRS VisNIR bands
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Electronic and optical crosstalk is one of the major challenges facing space-based Earth observing sensors, the effects of which could pose serious risks to the successful retrieval of geophysical information. There was an extensive effort during the SNPP VIIRS design and testing phase to characterize the on-orbit VisNIR crosstalk and its impact on environmental products. This paper describes an approach to assess the level of optical and electronic crosstalk on the measured radiance, and thereafter the retrieved geophysical products. During SNPP VIIRS pre-launch testing, a set of electronic and optical cross-talk influence coefficients was derived from measurements, which represent the amount of signal contamination received by each detector when other detectors on the same focal plane were illuminated. These coefficients were used to assess the potential crosstalk and its uncertainty on typical SNPP VIIRS land, atmosphere and ocean scenes. The simulation results show SNPP VIIRS crosstalk contamination is very small, less than 0.3 % for the stressing scenes, except for bands M7 and I2 over the dark ocean regions. These results are encouraging and constitute further evidence that SNPP VIIRS produces high quality imagery. The simulation approach presented in this paper could also be used for early crosstalk impact assessments for future VIIRS instruments.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Shihyan Lee, Hassan Oudrari, Jeff McIntire, and Xiaoxiong Xiong "Assessment of on-orbit crosstalk impact for SNPP VIIRS VisNIR bands", Proc. SPIE 9218, Earth Observing Systems XIX, 92180A (26 September 2014);


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