Comprehensive Annual Ice Sheet Velocity Mapping Using Landsat-8, Sentinel-1, and RADARSAT-2 Data
Abstract
:1. Introduction
2. Data and Methods
2.1. Landsat-8
2.2. Sentinel-1a/b
2.3. RADARSAT-2
2.4. Automatic Calibration Scheme
2.5. Annual Ice Velocity Mosaics
- If the number of acquisitions (per pixel) is greater than two, we compute the median and the standard deviation for each pixel individually over all the acquisitions made during the year.
- We remove measurements that exceed from the median:
- We then compute the weighted mean, weighted standard error, weighted standard deviation on remaining values. The weights are taken as , where are the precision in ice velocity as listed in Table 1.
3. Results
3.1. Antarctica
3.1.1. Landsat-8
3.1.2. RADARSAT-2 & Sentinel-1a
3.2. Greenland
3.2.1. Landsat-8
3.2.2. RADARSAT-2 & Sentinel-1a
3.3. Comparison of Ice Velocity Products
3.3.1. Individual Measurements
3.3.2. Mean Area-Percentage of Spatial Coverage Per Scene
3.3.3. Ice Velocity Precision
3.3.4. Mosaic Difference
4. Discussion
4.1. Potential of Landsat-8 for Large Scale Ice Velocity Mapping Compared with Current SAR Missions
4.2. Integration of Multi-Sensor Data
4.3. Implications for (Future) SAR Missions for Ice Velocity Measurements
5. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Resolution | Nominal Repeat | Ice Vel. | |
---|---|---|---|
Rg. × Az. (m) | Cycle (days) | Precision (m/year) | |
Landsat-8 | 15 × 15 | 16 | 34.2 × 34.2 |
Sentinel-1 | 4 × 14 | 12 | 12.2 × 42.6 |
RADARSAT-2 | 17 × 5 | 24 | 25.8 × 7.6 |
ENVISAT/ASAR | 20 × 4 | 35 | 20.8 × 4.2 |
ALOS/PALSAR | 7 × 3 | 46 | 5.5 × 2.4 |
RADARSAT-1 | 17 × 5 | 24 | 25.8 × 7.6 |
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Mouginot, J.; Rignot, E.; Scheuchl, B.; Millan, R. Comprehensive Annual Ice Sheet Velocity Mapping Using Landsat-8, Sentinel-1, and RADARSAT-2 Data. Remote Sens. 2017, 9, 364. https://doi.org/10.3390/rs9040364
Mouginot J, Rignot E, Scheuchl B, Millan R. Comprehensive Annual Ice Sheet Velocity Mapping Using Landsat-8, Sentinel-1, and RADARSAT-2 Data. Remote Sensing. 2017; 9(4):364. https://doi.org/10.3390/rs9040364
Chicago/Turabian StyleMouginot, Jeremie, Eric Rignot, Bernd Scheuchl, and Romain Millan. 2017. "Comprehensive Annual Ice Sheet Velocity Mapping Using Landsat-8, Sentinel-1, and RADARSAT-2 Data" Remote Sensing 9, no. 4: 364. https://doi.org/10.3390/rs9040364
APA StyleMouginot, J., Rignot, E., Scheuchl, B., & Millan, R. (2017). Comprehensive Annual Ice Sheet Velocity Mapping Using Landsat-8, Sentinel-1, and RADARSAT-2 Data. Remote Sensing, 9(4), 364. https://doi.org/10.3390/rs9040364