Wavefront coherence time - τ0
Wavefront Coherence Time (τ0) Maps 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.
Wavefront coherence time horizontal map extended on a 50km x 50km square surface centred on LBT (represented with a black dot). The Wavefront coherence time is integrated over three different vertical slabs:
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
The wavefront coherence time in each pixel is obtained integrating the CN2 and wind speed along the zenith and covering the temporal range [dusk,dawn]. The animations show the temporal evolution with 1-hour steps (in UT and MST). The black iso-lines represent the heights of the Digital Elevation Model (DEM).
Fig. 1: τ0 map [50×50]km integrated on [20-20000]m
Time animation with 1-hour steps
Fig. 2: τ0 map [50×50]km integrated on [20-600]m
Time animation with 1-hour steps
Fig. 3: τ0 map [50×50]km integrated on [600-20000]m
Time animation with 1-hour steps