astroplan Package

astroplan is an open source (BSD licensed) observation planning package for astronomers that can help you plan for everything but the clouds.

It is an in-development Astropy affiliated package that seeks to make your life as an observational astronomer a little less infuriating.


download_IERS_A([show_progress]) Download and cache the IERS Bulletin A table.
get_IERS_A_or_workaround() Get the cached IERS Bulletin A table if one exists.
is_always_observable(constraints, observer, ...) A function to determine whether targets are always observable throughout time_range given constraints in the constraints_list for a particular observer.
is_observable(constraints, observer, targets) Determines if the targets are observable during time_range given constraints in constraints_list for a particular observer.
max_best_rescale(vals, min_val, max_val[, ...]) rescales an input array vals to be a score (between zero and one),
min_best_rescale(vals, min_val, max_val[, ...]) rescales an input array vals to be a score (between zero and one),
months_observable(constraints, observer, targets) Determines which month the specified targets are observable for a specific observer, given the supplied constriants.
moon_illumination(time[, ephemeris]) Calculate fraction of the moon illuminated.
moon_phase_angle(time[, ephemeris]) Calculate lunar orbital phase in radians.
observability_table(constraints, observer, ...) Creates a table with information about observability for all the targets over the requested time_range, given the constraints in constraints_list for observer.
stride_array(arr, window_width) Computes all possible sequential subarrays of arr with length = window_width
test([package, test_path, args, plugins, ...]) Run the tests using py.test.
time_grid_from_range(time_range[, ...]) Get linearly-spaced sequence of times.


AirmassConstraint([max, min, boolean_constraint]) Constrain the airmass of a target.
AltitudeConstraint([min, max, ...]) Constrain the altitude of the target.
AstroplanWarning Superclass for warnings used by astroplan
AtNightConstraint([max_solar_altitude, ...]) Constrain the Sun to be below horizon.
Constraint Abstract class for objects defining observational constraints.
FixedTarget(coord[, name]) Coordinates and metadata for an object that is “fixed” with respect to the celestial sphere.
LocalTimeConstraint([min, max]) Constrain the observable hours.
MoonIlluminationConstraint([min, max, ephemeris]) Constrain the fractional illumination of the Earth’s moon.
MoonSeparationConstraint([min, max, ephemeris]) Constrain the distance between the Earth’s moon and some targets.
NonFixedTarget([name, ra, dec, marker]) Placeholder for future function.
Observer([location, timezone, name, ...]) A container class for information about an observer’s location and environment.
ObservingBlock(target, duration, priority[, ...]) An observation to be scheduled, consisting of a target and associated constraints on observations.
OldEarthOrientationDataWarning Using old Earth rotation data from IERS
PlotBelowHorizonWarning Warning for when something is hidden on a plot because it’s below the horizon
PlotWarning Warnings dealing with the plotting aspects of astroplan
PriorityScheduler(*args, **kwargs) A scheduler that optimizes a prioritized list.
Schedule(start_time, end_time[, constraints]) An object that represents a schedule, consisting of a list of Slot objects.
Scheduler(constraints, observer[, ...]) Schedule a set of ObservingBlock objects
Scorer(blocks, observer, schedule[, ...]) Returns scores and score arrays from the evaluation of constraints on
SequentialScheduler(*args, **kwargs) A scheduler that does “stupid simple sequential scheduling”.
Slot(start_time, end_time) A time slot consisting of a start and end time
SunSeparationConstraint([min, max]) Constrain the distance between the Sun and some targets.
Target([name, ra, dec, marker]) Abstract base class for target objects.
TargetAlwaysUpWarning Target is circumpolar
TargetNeverUpWarning Target never rises above horizon
TimeConstraint([min, max]) Constrain the observing time to be within certain time limits.
TransitionBlock(components[, start_time]) Parameterizes the “dead time”, e.g.
Transitioner([slew_rate, ...]) A class that defines how to compute transition times from one block to another.

Class Inheritance Diagram

Inheritance diagram of astroplan.constraints.AirmassConstraint, astroplan.constraints.AltitudeConstraint, astroplan.exceptions.AstroplanWarning, astroplan.constraints.AtNightConstraint, astroplan.constraints.Constraint,, astroplan.constraints.LocalTimeConstraint, astroplan.constraints.MoonIlluminationConstraint, astroplan.constraints.MoonSeparationConstraint,,, astroplan.scheduling.ObservingBlock, astroplan.exceptions.OldEarthOrientationDataWarning, astroplan.exceptions.PlotBelowHorizonWarning, astroplan.exceptions.PlotWarning, astroplan.scheduling.PriorityScheduler, astroplan.scheduling.Schedule, astroplan.scheduling.Scheduler, astroplan.scheduling.Scorer, astroplan.scheduling.SequentialScheduler, astroplan.scheduling.Slot, astroplan.constraints.SunSeparationConstraint,, astroplan.exceptions.TargetAlwaysUpWarning, astroplan.exceptions.TargetNeverUpWarning, astroplan.constraints.TimeConstraint, astroplan.scheduling.TransitionBlock, astroplan.scheduling.Transitioner

astroplan.plots Package

astroplan.plots contains functions for making plots of commonly-used quantities in observation planning (e.g., airmass vs. time), using astroplan and Matplotlib.


plot_airmass(targets, observer, time[, ax, ...]) Plots airmass as a function of time for a given target.
plot_finder_image(target[, survey, ...]) Plot survey image centered on target.
plot_parallactic(target, observer, time[, ...]) Plots parallactic angle as a function of time for a given target.
plot_schedule_airmass(schedule[, show_night]) Plots when observations of targets are scheduled to occur superimposed upon plots of the airmasses of the targets.
plot_sky(target, observer, time[, ax, ...]) Plots target positions in the sky with respect to the observer’s location.
plot_sky_24hr(target, observer, time[, ...]) Plots target positions in the sky with respect to the observer’s location over a twenty-four hour period centered on time.