Presentation + Paper
19 October 2023 PACE OCI crosstalk characterization based on pre-launch testing
Author Affiliations +
Abstract
Scheduled to launch in 2024, the Ocean Color Instrument (OCI) onboard the Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission will collect hyperspectral data from 315 nm to 895 nm via two grating spectrometers (in both the blue and red spectral regions) and 9 multi-spectral bands in the short-wave infrared (940 nm to 2260 nm). The increased spectral resolution and radiometric accuracy is expected to improve upon data collected by heritage sensors such as SeaWiFs, MODIS, and VIIRS, allowing new applications in ocean color, aerosol, and cloud science. During ground testing, higher than expected spatial-spectral crosstalk was measured for the hyperspectral bands in the blue spectrograph. Using a monochromatic-collimated light source, light from a single science pixel (1km x 1km) was found to produce crosstalk signals over 31 pixels in the cross-track direction. This spatial augmentation is caused by the spectral crosstalk’s asynchronous spatial movement during Time Delay Integration (TDI). To fully characterized the magnitude and spectral dependency from this, a crosstalk model was developed by synthesizing data collected from monochromatic-collimated light and monochromatic light that filled the OCI optical aperture. The model was validated by showing good agreement between predicted values and other relevant test data collected using both monochromatic and white light sources.
Conference Presentation
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Shihyan Lee, Gerhard Meister, Samuel Kitchen-McKinley, Joseph Knuble, Ulrik Gliese, and Robert Bousquet "PACE OCI crosstalk characterization based on pre-launch testing", Proc. SPIE 12729, Sensors, Systems, and Next-Generation Satellites XXVII, 1272919 (19 October 2023); https://doi.org/10.1117/12.2677567
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KEYWORDS
Crosstalk

Point spread functions

Charge-coupled devices

Data modeling

Spectral calibration

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