Seeing - ε

Seeing Horizontal Maps Temporal Evolution

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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.

Seeing horizontal map extended on a 50km x 50km square centred on LBT (represented with a black dot). The seeing is integrated over three different vertical slabs:

TOTAL SEEING (ε_TOT) – [dome-20000]m
BOUNDARY LAYER SEEING (ε_BL) – [dome-600]m
FREE ATMOSPHERE SEEING (ε_FA) – [600-20000]m

The seeing in each pixel is obtained integrating the C_N² along the zenith and covering the temporal range [dusk,dawn]. The black iso-lines represent the heights of the Digital Elevation Model (DEM).

ε_TOT AVERAGES:

Averages are computed over the whole night [<dusk> – <dawn>] UT and also in the first, central and last part of the night (see partition).

Fig 1: εTOT over the whole night [ – ]UT time frame

Fig 1: εTOT over the whole night [ – ]UT time frame

Fig. 2: εTOT over the “first part of the night”.

Fig. 3: εTOT over the “central part of the night”.

Fig. 4: ε_TOT over the “last part of the night”.

ε_BL AVERAGES:

Averages are computed over the whole night [<dusk> – <dawn>] UT and also in the first, central and last part of the night (see partition).

Fig. 5: εBL over the whole night [ – ]UT time frame

Fig. 5: εBL over the whole night [ – ]UT time frame

Fig. 6: εBL over the “first part of the night”.

Fig. 7: εBL over the “central part of the night”.

Fig. 8: εBL over the “last part of the night”.

ε_FA AVERAGES:

Averages are computed over the whole night [<dusk> – <dawn>] UT and also in the first, central and last part of the night (see partition).

Fig. 9: εBL over the whole night [ – ]UT time frame

Fig. 9: εBL over the whole night [ – ]UT time frame

Fig. 10: εFA over the “first part of the night”.

Fig. 11: εFA over the “central part of the night”.

Fig. 12: εFA over the “last part of the night”.