Progressive TDI measurements with the PACE OCI ETU

Jeff McIntire; Samuel Kitchen-McKinley; Hyeungu Choi; Gerhard Meister

doi:10.1117/12.2594239

1 August 2021 Progressive TDI measurements with the PACE OCI ETU

Jeff McIntire, Samuel Kitchen-McKinley, Hyeungu Choi, Gerhard Meister

Proceedings Volume 11829, Earth Observing Systems XXVI; 118290S (2021) https://doi.org/10.1117/12.2594239
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

The Plankton Aerosol Cloud ocean Ecosystem (PACE) Ocean Color Instrument (OCI) has completed the ground test program for its engineering unit (ETU) and testing of the flight unit will begin in the near future. OCI is a grating spectrometer with hyperspectral coverage from about 340 nm to 885 nm with 9 additional filtered channels in the SWIR. Two CCDs are used as detectors for the hyperspectral channels. One important operating mode of the CCDs on OCI is progressive time delay integration (or PTDI). In this mode, the charge in the CCD can be held for multiples of the nominal integration times. A series of these measurements can be made with progressively increasing multiples of the nominal integration time as the instrument scans across a uniform source. Ground testing with this operating mode on OCI ETU has shown promising results. This work will present measurements taken with the PTDI mode and the analysis of OCI ETU linearity and dynamic range.

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Jeff McIntire, Samuel Kitchen-McKinley, Hyeungu Choi, and Gerhard Meister "Progressive TDI measurements with the PACE OCI ETU", Proc. SPIE 11829, Earth Observing Systems XXVI, 118290S (1 August 2021); https://doi.org/10.1117/12.2594239

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KEYWORDS

Sensors

Calibration

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