Issue date: December 2022
Mate, Lampert, Ahmed, Diallo, & Stewart, Zweben. (2022). Novel angular velocity estimation technique for plasma filaments [Data set]. Princeton Plasma Physics Laboratory, Princeton University.
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Abstract: Data for the figures in text format. Please read the README file for detailed description.
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| # | Filename | Description | Filesize |
|---|---|---|---|
| 1 | fig1ab.txt | Two example consecutive frames of a rotating filament. Each line represents 64 horizontal pixels from the frame, each column represents vertical 80 pixels. Frame #1 and frame #2 are in the same file and contain the data for Fig. 1(a) and Fig. 1(b). | 37.5 KB |
| 2 | fig3abcd.txt | Pre-processing steps for the analysis. Same representation as for Fig. 1. Fig 3 (a,b,c,d) are in the same file in respective order: GPI_SLICED_FULL data (Fig. 3 (a)): Data for Figure 3 (a) GPI_NORMALIZED data (Fig. 3 (b)): Data for Figure 3 (b) GPI_DETREND_VEL data (Fig. 3 (c)): Data for Figure 3 (c) GPI_GAUSS_DIFF data (Fig. 3 (d)): Data for Figure 3 (d) | 321 KB |
| 3 | fig4a.txt | Fourier magnitude spectrum of a pre-processed GPI frame. x (pix) is the x coordinate in the Fourier magnitude spectrum. y (pix) is the y coordinate. FFT linear is the Fourier magnitude spectrum. Each line represents a horizontal row of pixels in the x axis while each column represents a vertical column of pixels in the y axis. | 866 KB |
| 4 | fig4b.txt | Same representation as Fig. 4 (a), but for the consecutive frame. | 865 KB |
| 5 | fig4c.txt | Log-polar transformed Fourier magnitude spectrum of the spectrum in Fig. 4 (a). phi (deg) is the polar coordinate in the transformed spectrum. r (pix) is the radial coordinate in the transformed spectrum. FFT logpol: Log-polar Fourier magnitude spectrum. Each line represents a horizontal row of pixels in the polar axis while each column represents a vertical column of pixels in the radial axis. | 2.49 MB |
| 6 | fig4d.txt | Same representation as Fig. 4 (c), but for the consecutive frame. | 2.5 MB |
| 7 | fig5.txt | Cross-correlation coefficient function calculated between the log-polar transformed Fourier magnitude spectra for the full polar and the [-31,31] radial range. r lag (pix): radial lag coordinate in the CCCF. phi lag (deg): polar lag coordinate in the CCCF 2D CCCF data: 2D spatial cross-correlation coefficient function. Each line represents a horizontal row of pixels in the phi lag axis while each column represents a vertical column of pixels in the r lag axis. | 877 KB |
| 8 | fig6.txt | Results of the cross-correlation threshold assessment for NSTX GPI measurement for shot 141319. Each row represents a point in the time series. The columns represent the time, and the angular velocity estimates for different correlation thresholds from 0.9 to 0.4 with 0.1 increments, respectively. | 44.1 KB |
| 9 | fig7.txt | Synthetic frames of a normal (Frame #1, Fig. 7 (a)) and a rotated (Frame #2, Fig. 7 (b)) Gaussian-structure. Same representation as in Figure 1. | 211 KB |
| 10 | fig8.txt | Relative uncertainty of the angular rotation estimation vs. angle of rotation and the Gaussian structure size. Angle rotation: rotation in degrees. Size vector: FWHM of the Gaussian structures in pixels. Relative uncertainty: Each row corresponds to a Gaussian size setting. Each column corresponds to an angle of rotation setting. | 8.9 KB |
| 11 | fig9.txt | Relative uncertainty of the angular rotation estimation vs. angle and elongation. Angle rotation: rotation in degrees Elongation: elongation of the Gaussian-structure. Relative uncertainty: Each row corresponds to a rotation angle setting, each column corresponds to an elongation setting. | 16.5 KB |
| 12 | fig10.txt | Mean and standard deviation of the relative uncertainty vs. angle of rotation and relative noise level. Angle of rotation: angle of rotation in degrees. Relative noise level: relative noise level settings. Mean relative uncertainty of the angular rotation estimation: Each row corresponds to a rotation angle setting, each column corresponds to a relative noise level setting. Data for Fig. 10 (a). Standard deviation of the relative uncertainty of the angular rotation estimation: Each row corresponds to a rotation angle setting, each column corresponds to a relative noise level setting. Data for Fig. 10 (b). | 30.3 KB |
| 13 | fig11_484.177ms.txt | 88 KB | |
| 14 | fig11_484.180ms.txt | 87.2 KB | |
| 15 | fig11_484.182ms.txt | 88.3 KB | |
| 16 | fig11_484.185ms.txt | 88 KB | |
| 17 | fig11_484.187ms.txt | 87.7 KB | |
| 18 | fig11_484.190ms.txt | 87.8 KB | |
| 19 | fig11_484.193ms.txt | 87.6 KB | |
| 20 | fig11_484.195ms.txt | 87.7 KB | |
| 21 | fig11_484.198ms.txt | 87.8 KB | |
| 22 | fig12.txt | Angular velocity estimation results for blobs in shot 141307. Time (ms): Time vector in milliseconds. Angular velocity (rad/s): Angular velocity in rad/s. | 14.8 KB |
| 23 | fig13_-2.5us.txt | 89.2 KB | |
| 24 | fig13_-5us.txt | 88.7 KB | |
| 25 | fig13_-7.5us.txt | 89.1 KB | |
| 26 | fig13_-10us.txt | 89.3 KB | |
| 27 | fig13_2.5us.txt | 88.9 KB | |
| 28 | fig13_5us.txt | 89.2 KB | |
| 29 | fig13_7.5us.txt | 89.4 KB | |
| 30 | fig13_10us.txt | 88.9 KB | |
| 31 | fig13_t_ELM.txt | 89.1 KB | |
| 32 | fig14.txt | Angular velocity estimation results for an ELM filament in shot 141319. Time (ms): Time vector in milliseconds. Angular velocity (rad/s): Angular velocity in rad/s. | 9.7 KB |
| 33 | fig15a.txt | Comparison of the angular velocity estimation techniques for shot 141307. Time CCCF (ms): Time vector in milliseconds for the CCCF technique. Angular velocity CCCF (krad/s): Angular velocity calculated with the CCCF based technique. Time contour (ms): Time vector in milliseconds for the contour technique. Angular velocity contour (krad/s): Angular velocity estimate with the contour based technique. Time watershed (ms): Time vector in milliseconds for the watershed technique. Angular velocity watershed (krad/s):Angular velocity estimate with the watershed based technique. | 42.7 KB |
| 34 | fig15b.txt | Comparison of the angular velocity estimation techniques for shot 141319. Same representation as for Fig. 15 (a). | 36.2 KB |
| 35 | README.txt | Detailed description of all of the data files. | 5.11 KB |