Table 4
Summary of LCT results in previous studies.
| α | FWHM | d grid | Δt | ΔT |
|
v med | v max | Remarks |
| [pixel-1] | [s] | [min] | [km s-1] | [km s-1] | [km s-1] | |||
|
|
||||||||
| November & Simon (1988) and November (1989) | continuum images at λ517.5 nm, Universal Birefringent Filter (UBF), 12 s exposure time, Dunn Solar Telescope/Sacramento Peak | |||||||
| 0.250″ | 3.3″ | 2.0″ | 67 | 80 | 0.5–1.0 (for source regions) | |||
| Brandt et al. (1988) | broad-band (5.4 nm) images at λ469.6 nm, Solar Optical Universal Polarimeter (SOUP), 20 ms exposure time, Swedish Solar Vacuum Telescope/Observatorio del Roque de los Muchachos | |||||||
| 0.035″ | 2.4″ | 0.8″ | 60 | 79 | 0.67 | 1.2 | ||
| Title et al. (1989) | broad-band (100 nm) images at λ600 nm, SOUP, short-exposure images recorded on photographic film, Spacelab 2, provides also proper motion measurements for other FWHM down to 1.0″ | |||||||
| 0.161″ | 4.0″ | 2.5″ | 60 | 28 | 0.37 ± 0.45 | <1.2 | ||
| Berger et al. (1998) | G-band images λ430.5 ± 0.6 nm, SOUP, 20 ms exposure time, SVST, LCT parameter study and comparison of proper motions between granulation and network | |||||||
| 0.083″ | 0.83″ | 0.4″ | 24 | 70 | 1.10 ± 1.30 | 0.70 | ~4.0 | |
| Shine et al. (2000) | continuum images near the Ni i λ676.8 nm line, Michelson Doppler Imager (MDI), Solar Heliospheric Observatory (SoHO), long-duration sequence of 45.5 h | |||||||
| 0.600″ | 4.8″ | 2.4″ | 60 | 60 | 0.49 | 0.47 | 1.5 | |
Notes. α: image scale, FWHM: width
of the sampling window, dgrid: grid spacing on which LCT
flow vectors are computed, Δt: image cadence, ΔT:
time interval over which individual LCT maps are averaged,
:
average flow speed and standard deviation, vmed: median
value of the frequency distribution, and vmax: highest
observed flow speed.
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