Pulse Response of the Short-Wave Infrared Detection System of the Ocean Color Instrument for the NASA PACE Mission

被引：1

作者：

Gliese, U. ^{[1
]}

Rhodes, Z. ^{[2
]}

Squire, K. ^{[2
]}

Jepsen, K. S. ^{[3
]}

Cairns, B. ^{[4
]}

Clemons, B. L. ^{[5
]}

Cook, J. ^{[2
]}

Esplin, R. ^{[2
]}

Estep, R. H., Jr. ^{[5
]}

Gorman, E. T. ^{[5
,6
]}

Kan, E. ^{[5
]}

Lu, W. ^{[7
]}

Meister, G. ^{[5
]}

Mott, D. B. ^{[5
]}

Patt, F. S. ^{[8
]}

Peterson, J. ^{[2
]}

Schnurr, R. G. ^{[5
]}

机构：

[1] KBR, 8120 Maple Lawn Blvd, Fulton, MD 20759 USA

[2] Space Dynam Lab, 416 East Innovat Ave, N Logan, UT 84341 USA

[3] SSAI, 10210 Greenbelt Rd, Lanham, MD 20706 USA

[4] NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA

[5] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[6] Quantum Space, 801 Thompson Ave, Rockville, MD 20852 USA

[7] NOVA Fed, 20755 Williamsport Pl,Suite 380, Ashburn, VA 20147 USA

[8] SAIC, 12010 Sunset Hills Rd, Reston, VA 20190 USA

来源：

SENSORS, SYSTEMS, AND NEXT-GENERATION SATELLITES XXVII | 2023年 / 12729卷

关键词：

Remote Sensing; Optical; Radiometer; Short-Wave Infrared; SWIR; Detection; Photodiode; Pulse-Response;

D O I：

10.1117/12.2684367

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

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 x 1 km and a spectral resolution of 5 nm in 2.5 nm steps over 342-887 nm. In addition, OCI provides 7 discrete bands in the 940-2260 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 x 1 km. For the SWIR bands, the slit-image is re-imaged onto a 16x1 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.

引用

页数：11