Wavefront coherence time - τ0
Wavefront Coherence Time (τ0) Temporal Evolution
Forecast relative to the night starting on 2026/06/14 MST
Note: click on a figure to magnify the image. Date of figures refers to the start of night in MST.
Temporal evolution of the wavefront coherence time integrated in different vertical slabs between the sunset and the sunrise:
TOTAL WAVEFRONT COHERENCE TIME (τ0,TOT) – [dome-20000]m
BOUNDARY LAYER WAVEFRONT COHERENCE TIME (τ0,BL) – [dome-600]m
FREE ATMOSPHERE WAVEFRONT COHERENCE TIME (τ0,FA) – [600-20000]m
Astronomical dusk and dawn are shown too.
On the x-axis is time in UT (bottom), in MST (top). Mountain Standard Time MST=UT-7. Data points frequency is 2 minutes. Data points are re-sampled at a frequency of 20 minutes after a 1-hour moving average. The error bars are the sigma over the 20 minutes sampling, computed before the moving average.
Fig. 1: Temporal evolution of τ0,TOT ([dome-20km]) between the sunset and the sunrise.
Fig. 2: Temporal evolution of τ0,BL ([dome-600m]) between the sunset and the sunrise.
Fig. 3: Temporal evolution of τ0,FA ([600m-20km]) between the sunset and the sunrise.