Currently, ESBO-ETC only supports detectors of the type :ref:`imager`.
..code-block:: xml
<sensor type="">
Attributes:
* | **type:** str
| The type of the detector. Has to be one of [``Imager``].
.._imager:
Imager
------
The Imager sensor type allows to model a generic imaging sensor which uses a pixel based array to create only spatially resolved images. The imager-component contains several parameters which are explained in the following.
| The geometry of the sensor's pixel array as a comma separated list of the number of pixels per dimension (X, Y).
* | **val_unit:** str, *optional* = "pix"
| The unit of the geometry of the sensor's pixel array. This has to be ``pix``.
.._center_offset:
center_offset
^^^^^^^^^^^^^
The PSF's center offset from the arithmetical center of the detector array which is defined as half of the number of pixels per dimension as defined in :ref:`pixel_geometry`
| Either the value of the quantum efficiency or the path to the file containing the quantum efficiency values. For details on the required file structure see also :ref:`reading_csv`.
| The value of the well capacity of a detector pixel.
* | **val_unit:** str, *optional* = "electron"
| The unit of the well capacity of a detector pixel. This has to be ``electron``.
photometric_aperture
^^^^^^^^^^^^^^^^^^^^
*optional*
The photometric_aperture-container contains parameters for the photometric aperture of the observation. This container is only required, if the :ref:`target` has the shape ``point``.
The shape of the photometric aperture which will be placed around the center of the PSF which is defined by :ref:`center_offset`. After the radius of the photometric aperture was calculated using a disk for the given :ref:`contained_energy`, this radius will be used as radius or edge length of the photometric aperture shape.
..code-block:: xml
<shape val="circle"/>
Attributes:
* | **val:** str
| The shape of the photometric aperture. This has to be one of [``circle``, ``square``].
.._contained_energy:
contained_energy
""""""""""""""""
*optional*
The energy to be contained within the photometric aperture. This value will used for the computation of the radius of the photometric aperture.
| The energy to be contained within the photometric aperture. This can be either the percentage of contained energy or one of [``Peak``, ``FWHM``, ``Min``].
The radius respectively the edge length of the photometric aperture in pixels. If this parameter is given, the :ref:`contained_energy` parameter will be ignored.
The heterodyne sensor type allows to model a generic DSB heterodyne radio receiver which uses an local oscillator and an mixer to create spectral images. The heterodyne-component contains several parameters which are explained in the following. All parameters are defined according to the `Guide to GREAT <https://www.sofia.usra.edu/science/proposing-and-observing/observers-handbook-cycle-9/6-great/61-specifications#PerformanceGREAT>`_.
The wavelength or frequency of the local oscillator. This parameter is optional. If no value is given, the noise temperature of the signal band is doubled.
| The unit of the local oscillator wavelength. This has to be on of [``nm``, ``um``, ``mm``, ``cm``, ``m``, ``Hz``, ``kHZ``, ``MHz``, ``GHz``, ``THz``].