Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements
Abstract
:1. Introduction
2. Materials and Methods
2.1. CIDUM Algorithm with Minor Modification
2.2. Study Area and Field Measurements
2.3. Aerosol Estimation Process for Turbid Waters
- (Step 1) Estimating aerosol reflectance in the NIR bands (745 and 865 nm)
- (Step 2) Selecting the aerosol models and estimating aerosol reflectance
- (Step 3) Updating for the visible bands
- (Step 4) Estimating water reflectance at the NIR bands
- (Step 5) Repeating Steps 1 through 4 until convergence
3. Results
3.1. Boundary Analysis
3.2. Assessment with in Situ Radiometric Measurements
4. Discussion
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
Abbreviations
ISRD: | Interslot radiometric discrepancy |
SLRI: | Stray-light-driven radiometric inflation |
CIDUM: | Correction of the interslot discrepancy using the minimum noise fraction transform |
GOCI: | Geostationary ocean color imager |
MNF: | Minimum noise fraction |
TOA: | Top of atmosphere |
L1A: | Level 1A |
L1B: | Level 1B |
APD: | Absolute mean percentage difference |
RPD: | Relative mean percentage difference |
SPM: | Suspended particulate matter |
Appendix: The Minimum Noise Fraction (MNF) Transform
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ID | Year | Month | Day | Latitude | Longitude | Hour | Minute |
---|---|---|---|---|---|---|---|
1 | 2012 | 07 | 31 | 35.5179 | 126.3264 | 02 | 04 |
2 | 35.5178 | 126.2855 | 02 | 23 | |||
3 | 35.6653 | 126.1580 | 05 | 10 | |||
4 | 2012 | 10 | 16 | 34.9686 | 126.0695 | 00 | 10 |
5 | 34.9671 | 126.0255 | 00 | 28 | |||
6 | 34.9656 | 125.9816 | 00 | 47 | |||
7 | 34.9642 | 125.9377 | 01 | 04 | |||
8 | 34.9626 | 125.8938 | 01 | 24 | |||
9 | 34.9611 | 125.8498 | 01 | 40 | |||
10 | 34.9596 | 125.8059 | 02 | 02 | |||
11 | 34.9564 | 125.7180 | 02 | 40 | |||
12 | 34.9533 | 125.6302 | 03 | 02 | |||
13 | 35.0219 | 125.5384 | 04 | 27 | |||
14 | 35.0251 | 125.6263 | 04 | 54 | |||
15 | 35.0283 | 125.7143 | 05 | 21 | |||
16 | 35.0315 | 125.8022 | 05 | 48 | |||
17 | 2013 | 10 | 23 | 35.1479 | 125.8511 | 00 | 20 |
18 | 35.1497 | 125.8528 | 01 | 25 | |||
19 | 35.1826 | 125.8072 | 01 | 58 | |||
20 | 35.1465 | 125.8483 | 02 | 27 | |||
21 | 35.1830 | 125.8476 | 02 | 52 | |||
22 | 35.1477 | 125.8503 | 03 | 22 | |||
23 | 35.1442 | 125.8495 | 04 | 27 | |||
24 | 35.1811 | 125.8887 | 04 | 52 | |||
25 | 35.1425 | 125.8474 | 06 | 23 | |||
26 | 35.1061 | 125.8036 | 06 | 53 |
Correlation | APD () | RPD () | ||||
---|---|---|---|---|---|---|
Before | After | Before | After | Before | After | |
Band 1 | 0.55 | 0.74 | 40.4 | 29.7 | −1.4 | 3.1 |
Band 2 | 0.79 | 0.87 | 30.0 | 22.9 | −13.4 | −13.8 |
Band 3 | 0.90 | 0.92 | 21.3 | 14.2 | −7.7 | −4.9 |
Band 4 | 0.94 | 0.95 | 16.1 | 11.1 | −7.1 | −1.2 |
Band 5 | 0.96 | 0.97 | 37.3 | 27.6 | −22.3 | −19.1 |
Band 6 | 0.96 | 0.96 | 35.4 | 24.4 | −3.6 | −12.8 |
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Kim, W.; Moon, J.-E.; Ahn, J.-H.; Park, Y.-J. Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements. Remote Sens. 2016, 8, 378. https://doi.org/10.3390/rs8050378
Kim W, Moon J-E, Ahn J-H, Park Y-J. Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements. Remote Sensing. 2016; 8(5):378. https://doi.org/10.3390/rs8050378
Chicago/Turabian StyleKim, Wonkook, Jeong-Eon Moon, Jae-Hyun Ahn, and Young-Je Park. 2016. "Evaluation of Stray Light Correction for GOCI Remote Sensing Reflectance Using in Situ Measurements" Remote Sensing 8, no. 5: 378. https://doi.org/10.3390/rs8050378