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Open AccessArticle

The On-Orbit Non-Uniformity Correction Method with Modulated Internal Calibration Sources for Infrared Remote Sensing Systems

1
Key Laboratory of Photo-electronic Imaging Technology and System, Ministry of Education of China, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
2
Beijing Institute of Space Mechanics & Electricity, Beijing 100094, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(6), 830; https://doi.org/10.3390/rs10060830
Received: 24 April 2018 / Revised: 13 May 2018 / Accepted: 22 May 2018 / Published: 25 May 2018
(This article belongs to the Section Remote Sensing Image Processing)
The scanning infrared focal plane array (IRFPA) suffers from stripe-like non-uniformity due to the usage of many detectors, especially when working with a large time scale. Typical calibration systems tend to block the sensor aperture and expose the detectors to an on-board blackbody calibration source. They may also point at deep space. Full aperture calibration sources of this type tend to be large and expensive. To address these problems, a dynamic non-uniformity correction (NUC) method is proposed based on a modulated internal calibration device. By employing the on-board calibration device to generate a dynamic scene and fully integrating the system characteristics of the scanning IRFPA into the scene-based non-uniformity correction (SBNUC) algorithm, on-orbit high dynamic range NUC is achieved without blocking the field of view. Here we simulate an internal calibration system alternative, where a dynamic calibration signal is superimposed on the normal imagery, thus requiring no mechanisms and a smaller size. This method using this type of calibrator shows that when the sensor is pointing at deep space for calibration, it provides an effective non-uniformity correction of the imagery. After performing the proposed method, the NU of the two evaluation images was reduced from the initial 12.99% and 8.72% to less than 2%. Compared to other on-board NUC methods that require an extended reference blackbody source, this proposed approach has the advantages of miniaturization, a short calibration time, and strong adaptability. View Full-Text
Keywords: infrared remote sensing; high dynamic range; radiometric calibration; scene-based non-uniformity correction; on-orbit; black body; Wide-field Infrared Survey Explorer (WISE) infrared remote sensing; high dynamic range; radiometric calibration; scene-based non-uniformity correction; on-orbit; black body; Wide-field Infrared Survey Explorer (WISE)
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MDPI and ACS Style

Sheng, Y.; Dun, X.; Jin, W.; Zhou, F.; Wang, X.; Mi, F.; Xiao, S. The On-Orbit Non-Uniformity Correction Method with Modulated Internal Calibration Sources for Infrared Remote Sensing Systems. Remote Sens. 2018, 10, 830.

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