AtNightConstraint¶

class
astroplan.
AtNightConstraint
(max_solar_altitude=<Quantity 0.0 deg>, force_pressure_zero=True)[source]¶ Bases:
astroplan.Constraint
Constrain the Sun to be below
horizon
.Parameters: max_solar_altitude :
Quantity
The altitude of the sun below which it is considered to be “night” (inclusive).
force_pressure_zero : bool (optional)
Force the pressure to zero for solar altitude calculations. This avoids errors in the altitude of the Sun that can occur when the Sun is below the horizon and the corrections for atmospheric refraction return nonsense values.
Methods Summary
compute_constraint
(times, observer, targets)twilight_astronomical
(**kwargs)Consider nighttime as time between astronomical twilights (18 degrees). twilight_civil
(**kwargs)Consider nighttime as time between civil twilights (6 degrees). twilight_nautical
(**kwargs)Consider nighttime as time between nautical twilights (12 degrees). Methods Documentation

classmethod
twilight_astronomical
(**kwargs)[source]¶ Consider nighttime as time between astronomical twilights (18 degrees).

classmethod