Blending Sea Surface Winds from the HY-2 Satellite Scatterometers Based on a 2D-Var Method
Abstract
:1. Introduction
2. Data and Methods
2.1. Data
2.2. 2D-Var Method
3. Data Verification
4. Results
4.1. Test Case
4.2. General Validation
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Satellite | Altitude (km) | Inclination (°) | LTDN * | Repeat Cycle | |
---|---|---|---|---|---|
The Early Stage | The End Stage | ||||
HY-2B | 971 | 99.3 | 6:00 am | 14 days | 168 days |
HY-2C | 957 | 66 | Drifting | 10 days | 400 days |
HY-2D | 957 | 66 | Drifting | 10 days | 400 days |
Scatterometer | Wind Speed (m/s) | Wind Direction (°) | |||||
---|---|---|---|---|---|---|---|
HSCAT-B | HSCAT-C | HSCAT-D | HSCAT-B | HSCAT-C | HSCAT-D | ||
Time difference | 0.0–0.5 h | −0.28 | −0.19 | −0.18 | 0.5 | 1.6 | 0.3 |
0.5–1.0 h | −0.26 | −0.19 | −0.16 | 0.5 | 0.9 | 1.3 | |
1.0–1.5 h | −0.28 | −0.23 | −0.15 | 0.8 | 1.5 | 1.2 | |
1.5–2.0 h | −0.31 | −0.24 | −0.20 | 0.3 | 0.1 | 0.2 | |
2.0–2.5 h | −0.30 | −0.20 | −0.18 | 1.0 | 0.9 | 0.8 | |
2.5–3.0 h | −0.25 | −0.25 | −0.18 | 1.3 | 1.0 | 1.1 |
Scatterometer | Wind Speed (m/s) | Wind Direction (°) | |||||
---|---|---|---|---|---|---|---|
HSCAT-B | HSCAT-C | HSCAT-D | HSCAT-B | HSCAT-C | HSCAT-D | ||
Time difference | 0.0–0.5 h | 1.11 | 1.05 | 1.20 | 17.7 | 17.9 | 18.1 |
0.5–1.0 h | 1.20 | 1.06 | 1.21 | 16.6 | 18.0 | 17.4 | |
1.0–1.5 h | 1.18 | 1.16 | 1.13 | 17.1 | 16.6 | 17.0 | |
1.5–2.0 h | 1.24 | 1.28 | 1.38 | 17.0 | 18.1 | 17.6 | |
2.0–2.5 h | 1.40 | 1.45 | 1.42 | 18.7 | 19.9 | 19.3 | |
2.5–3.0 h | 1.39 | 1.53 | 1.55 | 20.3 | 21.1 | 22.1 | |
u component (m/s) | v component (m/s) | ||||||
HSCAT-B | HSCAT-C | HSCAT-D | HSCAT-B | HSCAT-C | HSCAT-D | ||
Time difference | 0.0–0.5 h | 1.65 | 1.69 | 1.75 | 1.85 | 2.22 | 2.19 |
0.5–1.0 h | 1.70 | 1.65 | 1.71 | 1.76 | 2.05 | 2.22 | |
1.0–1.5 h | 1.62 | 1.64 | 1.60 | 2.01 | 1.96 | 1.77 | |
1.5–2.0 h | 1.75 | 1.82 | 1.67 | 1.77 | 2.10 | 1.89 | |
2.0–2.5 h | 1.95 | 1.93 | 1.96 | 2.08 | 2.21 | 2.49 | |
2.5–3.0 h | 2.00 | 2.06 | 2.23 | 2.28 | 2.33 | 2.45 |
Scatterometer | u Component | v Component | |||||
---|---|---|---|---|---|---|---|
HSCAT-B | HSCAT-C | HSCAT-D | HSCAT-B | HSCAT-C | HSCAT-D | ||
Time difference | 0.0–0.5 h | 1.00 | 1.02 | 1.06 | 0.97 | 1.17 | 1.15 |
0.5–1.0 h | 1.03 | 1.00 | 1.03 | 0.93 | 1.08 | 1.17 | |
1.0–1.5 h | 0.98 | 0.99 | 0.97 | 1.06 | 1.03 | 0.93 | |
1.5–2.0 h | 1.05 | 1.10 | 1.00 | 0.93 | 1.11 | 0.99 | |
2.0–2.5 h | 1.18 | 1.16 | 1.18 | 1.10 | 1.16 | 1.31 | |
2.5–3.0 h | 1.20 | 1.24 | 1.34 | 1.20 | 1.23 | 1.29 |
Statistical Scores | Speed (m/s) | Direction (°) | u (m/s) | v (m/s) | |
---|---|---|---|---|---|
GSF | Obs | 1.20 | 15.6 | 1.61 | 1.89 |
No Obs | 1.77 | 19.3 | 2.16 | 2.31 | |
Overall | 1.51 | 17.5 | 1.90 | 2.11 | |
EBEC | Obs | 1.17 | 15.8 | 1.62 | 1.89 |
No Obs | 1.60 | 18.0 | 1.99 | 2.15 | |
Overall | 1.40 | 16.9 | 1.81 | 2.02 |
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Lv, S.; Lin, W.; Wang, Z.; Zou, J. Blending Sea Surface Winds from the HY-2 Satellite Scatterometers Based on a 2D-Var Method. Remote Sens. 2023, 15, 193. https://doi.org/10.3390/rs15010193
Lv S, Lin W, Wang Z, Zou J. Blending Sea Surface Winds from the HY-2 Satellite Scatterometers Based on a 2D-Var Method. Remote Sensing. 2023; 15(1):193. https://doi.org/10.3390/rs15010193
Chicago/Turabian StyleLv, Sirui, Wenming Lin, Zhixiong Wang, and Juhong Zou. 2023. "Blending Sea Surface Winds from the HY-2 Satellite Scatterometers Based on a 2D-Var Method" Remote Sensing 15, no. 1: 193. https://doi.org/10.3390/rs15010193
APA StyleLv, S., Lin, W., Wang, Z., & Zou, J. (2023). Blending Sea Surface Winds from the HY-2 Satellite Scatterometers Based on a 2D-Var Method. Remote Sensing, 15(1), 193. https://doi.org/10.3390/rs15010193