Paper
20 November 2024 Spectrally dependent radiometric measurement errors due to CCD serial pixel-to-pixel readout interference in the Ocean Color Instrument of the NASA PACE mission
U. Gliese, K. S. Jepsen, K. Boggs, G. Bredthauer, L. H. Chemerys, F. N. Chi, D. G. Holliday, J. J. Knuble, S. Lee, W. Lu, A. J. Mariano, J. W. Mcintire, G. Meister, D. M. Morgan, D. B. Mott
Author Affiliations +
Abstract
The Ocean Color Instrument on NASA’s PACE mission is a 322-887nm hyperspectral imager with 1km x 1km nadir spatial resolution and 5nm spectral resolution utilizing charge-coupled devices (CCDs) operating in Time Delay Integration (TDI) mode where each TDI column represents a different wavelength in 0.625nm increments. After TDI, the charge is moved into serial output pixels and read out. The spatial resolution requires an 8.5MHz readout rate. This only allows 59ns for the CCD reset and video to be asserted and settled before sampling. The response exhibits serial pixel-to-pixel readout interference due to the lack of full settling. Each serial pixel value has a dependence on the value of the preceding pixel value. This leads to a spectrally dependent radiometric measurement error of up to 0.3%. We explain the operation of the detection system, the behavior of the interference, and show the resulting measurement error based on data from both ground testing and on-orbit characterization.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
U. Gliese, K. S. Jepsen, K. Boggs, G. Bredthauer, L. H. Chemerys, F. N. Chi, D. G. Holliday, J. J. Knuble, S. Lee, W. Lu, A. J. Mariano, J. W. Mcintire, G. Meister, D. M. Morgan, and D. B. Mott "Spectrally dependent radiometric measurement errors due to CCD serial pixel-to-pixel readout interference in the Ocean Color Instrument of the NASA PACE mission", Proc. SPIE 13192, Sensors, Systems, and Next-Generation Satellites XXVIII, 131920G (20 November 2024); https://doi.org/10.1117/12.3033843
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KEYWORDS
Video

Charge-coupled devices

Cadmium sulfide

Staring arrays

Analog to digital converters

Tunable filters

Optical filters

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