Isoplanatic angle - θ0

Isoplanatic Angle (θ₀) 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 isoplanatic angle integrated in [dome-20000]m between the sunset and the sunrise:

TOTAL ISOPLANATIC ANGLE (θ0,TOT) – [dome-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 θ0,TOT ([dome-20km]) between the sunset and the sunrise.