giant.photometry.photometry

This module provides photometric modelling for calculations in GIANT.

Description

In GIANT, a Photometry object is used to describe the photometric attributes of a target. These attributes are:

  • whether the target is resolved

  • apparent magnitude of the target

  • I over F of the target

  • DNrate of the target

  • SNR of the target

The PhotometricCameraModel object is used to define camera parameters specifically used for photometry and planning.

Use

To use the Photometry class in GIANT you simply create SceneObject instances for any targets and the light source for your scene (currently only a single light source is allowed). You then create a Scene around these objects and input this scene into the photometry class along with the associated PhotometryCameraModel.

***Note: If using this class outside the ObservationPlanner class, the scene must be defined in the camera frame.

This then gives you the ability to determine the photometry of the target bodies relative to the camera frame. This determines if a target is resolved, dnrate, and Signal-to-Noise ratio.

Classes

PhotometricCameraModel

This class is used to set parameters for a Photometric Camera

Photometry

This is most useful when you would like to determine the required photometry inputs for opnavs given a certain date.