Isoplanatic angle - θ0
Isoplanatic Angle (θ₀) Map
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.
Isoplanatic angle horizontal map extended on a 50km x 50km square surface centred on LBT (represented with a black dot). The isoplanatic angle in integrated in [dome-20000]m vertical slab.
The isoplanatic angle in each pixel is obtained integrating the CN2 along the zenith and covering the temporal range [dusk,dawn].
On the top left, an animation with a temporal evolution with 1-hour steps in the [dusk,dawn] time frame is shown.
On the top right, an average over the [dusk-dawn] time frame is shown.
On the bottom, isplanatic angle averages are computed over the first, central and last part of the night (see partition).
The black iso-lines represent the heights of the Digital Elevation Model (DEM).
Fig. 1: Temporal evolution of θ0,TOT ([dome-20km]) between the sunset and the sunrise.
Fig. 2: θ0 map averaged on [20-20000]m vertical slab
over the whole night time frame
Fig. 3: θ0 map averaged on [20-20000]m vertical slab over the “first part of the night”.
Fig. 4: θ0 map averaged on [20-20000]m vertical slab over the “central part of the night”.
Fig. 5: θ0 map averaged on [20-20000]m vertical slab over the “last part of the night”.