Publication Abstracts
Gliese et al. 2023
Gliese, U., Z. Rhodes, K. Squire, K.S. Jepsen, , B.L. Clemons, J. Cook, R. Esplin, R.H. Estep, Jr., E.T. Gorman, E. Kan, G. Meister, W. Lu, D.B. Mott, F.S. Patt, J. Peterson, and R.G. Schnurr, 2023: Pulse response of the shortwave infrared detection system of the ocean color instrument for the NASA PACE Mission. In Sensors, Systems, and Next-Generation Satellites XXVII, 19 Oct. 2023, Amsterdam, Netherlands. S.R. Babu, A. Hélière, and T. Kimura, Eds., Proc. SPIE, vol. 12729, p. 127290O, doi:10.1117/12.2684367.
The Ocean Color Instrument (OCI) on NASA's Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission is a hyperspectral Earth imager with a spatial resolution of 1 km × 1 km and a spectral resolution of 5 nm in 2.5 nm steps over 342-887 nm. In addition, OCI provides seven discrete bands in the 940 nm to 2260 nm Short-Wave InfraRed (SWIR) range. The front-end optical imager is a rotating mirror-based system that images the ground scene onto a slit with an instantaneous field of view of 16 km × 1 km. For the SWIR bands, the slit-image is re-imaged onto a 161 micro-lens array that effectively acts as the focal plane since each lens element is fiber coupled to wavelength filtered InGaAs and HgCdTe Photo Diodes (PDs). The pulse response of the detection system is critical to OCI SWIR performance. We find that PDs introduce an inherent slow tail in the pulse response due to slow diffusion moving carriers in their n and p regions. We show that this introduces response errors ranging from 1 down to 0.01 % for up to tens of science pixels after the pulse depending on the PD design and materials. It is shown that the response is distinctly different for the InGaAs and HgCdTe PDs. We explain how the front-end design can further increase this error. Finally, we detail the cause of the slow pulse response tail, how to model it, its impact on OCI performance and how it is characterized and corrected to meet OCI requirements.
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BibTeX Citation
@inproceedings{gl04100o,
author={Gliese, U. and Rhodes, Z. and Squire, K. and Jepsen, K. S. and Cairns, B. and Clemons, B. L. and Cook, J. and Esplin, R. and Estep, Jr., R. H. and Gorman, E. T. and Kan, E. and Meister, G. and Lu, W. and Mott, D. B. and Patt, F. S. and Peterson, J. and Schnurr, R. G.},
editor={Babu, S. R. and Hélière, A. and Kimura, T.},
title={Pulse response of the shortwave infrared detection system of the ocean color instrument for the NASA PACE Mission},
booktitle={Sensors, Systems, and Next-Generation Satellites XXVII, 19 Oct. 2023, Amsterdam, Netherlands},
year={2023},
volume={12729},
pages={127290O},
series={Proc. SPIE},
doi={10.1117/12.2684367},
}
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RIS Citation
TY - CPAPER ID - gl04100o AU - Gliese, U. AU - Rhodes, Z. AU - Squire, K. AU - Jepsen, K. S. AU - Cairns, B. AU - Clemons, B. L. AU - Cook, J. AU - Esplin, R. AU - Estep, R. H., Jr. AU - Gorman, E. T. AU - Kan, E. AU - Meister, G. AU - Lu, W. AU - Mott, D. B. AU - Patt, F. S. AU - Peterson, J. AU - Schnurr, R. G. ED - Babu, S. R. ED - Hélière, A. ED - Kimura, T. PY - 2023 TI - Pulse response of the shortwave infrared detection system of the ocean color instrument for the NASA PACE Mission BT - Sensors, Systems, and Next-Generation Satellites XXVII, 19 Oct. 2023, Amsterdam, Netherlands T3 - Proc. SPIE VL - 12729 SP - 127290O DO - 10.1117/12.2684367 ER -
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