期刊
REMOTE SENSING
卷 7, 期 1, 页码 430-446出版社
MDPI AG
DOI: 10.3390/rs70100430
关键词
side-slither; relative gain; radiometric calibration; Landsat 8; OLI; deep convective clouds; yaw maneuver
类别
资金
- NASA from the Landsat Project Science Office [NNX09AH23A]
- USGS EROS Grant [G08AC00031]
- South Dakota Space Grant Consortium
- NASA [117946, NNX09AH23A] Funding Source: Federal RePORTER
Landsat 8 is the first satellite in the Landsat mission to acquire spectral imagery of the Earth using pushbroom sensor instruments. As a result, there are almost 70,000 unique detectors on the Operational Land Imager (OLI) alone to monitor. Due to minute variations in manufacturing and temporal degradation, every detector will exhibit a different behavior when exposed to uniform radiance, causing a noticeable striping artifact in collected imagery. Solar collects using the OLI's on-board solar diffuser panels are the primary method of characterizing detector level non-uniformity. This paper reports on an approach for using a side-slither maneuver to estimate relative detector gains within each individual focal plane module (FPM) in the OLI. A method to characterize cirrus band detector-level non-uniformity using deep convective clouds (DCCs) is also presented. These approaches are discussed, and then, correction results are compared with the diffuser-based method. Detector relative gain stability is assessed using the side-slither technique. Side-slither relative gains were found to correct streaking in test imagery with quality comparable to diffuser-based gains (within 0.005% for VNIR/PAN; 0.01% for SWIR) and identified a 0.5% temporal drift over a year. The DCC technique provided relative gains that visually decreased striping over the operational calibration in many images.
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