# TimeConstraint¶

class astroplan.TimeConstraint(min=None, max=None)[source]

Constrain the observing time to be within certain time limits.

An example use case for this class would be to associate an acceptable time range with a specific observing block. This can be useful if not all observing blocks are valid over the time limits used in calls to is_observable or is_always_observable.

Parameters: min : Time Earliest time (inclusive). None indicates no limit. max : Time Latest time (inclusive). None indicates no limit.

Examples

Constrain the observations to targets that are observable between 2016-03-28 and 2016-03-30:

>>> from astroplan import Observer
>>> from astropy.time import Time
>>> subaru = Observer.at_site("Subaru")
>>> t1 = Time("2016-03-28T12:00:00")
>>> t2 = Time("2016-03-30T12:00:00")
>>> constraint = TimeConstraint(t1,t2)


Methods Summary

 compute_constraint(times, observer, targets)

Methods Documentation

compute_constraint(times, observer, targets)[source]