Observatories and observations
==============================

Observatories glue together :class:`.Atmosphere`, :class:`.Telescope`
and :class:`.Spectrograph` properties as the base for
observations. They are callable with observing conditions (airmass,
seeing, moon brightness) and then create an "observation".

There are two implementations of Observatory: The
:class:`.SimpleObservatory` uses a single spectrograph that can be
specified in the constructor, while the :class:`.QMostObservatory`
combines all three arms of a 4MOST "LRS" or "HRS" spectrograph, the
standard Paranal Atmosphere and the Vista telescope properties.

Observations can get a point like, flat, or sersic targets set, and
then estimate the response to a specified exposure time.

.. seealso::

   The class :class:`.QMostETC` provides the calculation of the
   exposure time based on a specified ruleset.

.. currentmodule:: qmostetc

.. autoclass:: SimpleObservatory
    :members:
    :undoc-members:

.. autoclass:: SimpleObservation
    :members:
    :undoc-members:

.. autoclass:: QMostObservatory
    :members:
    :undoc-members:

.. autoclass:: QMostObservation
    :members:
    :undoc-members: