Camera Calibration

Introduction

This module contains all the methods and classes that are used to calibrate the CTA Cameras (MC, prototypes and final camera calibration algorithms).

CameraCalibrator

The primary class in this module is the CameraCalibrator. This class handles two data level transition stages for the event:

• R1 → DL0 (Image Volume Reduction)

• DL0 → DL1 (Image Extraction (Waveform Cube to Image))

The class takes a ctapipe event container, and fills the next data level containers with the calibrated information.

See the CTA Top-Level Data Model Definitions document (CTA internal) for information about the different data levels.

Reference/API

ctapipe.calib.camera Package

Camera calibration module.

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ctapipe.calib.camera.calibrator Module

Definition of the CameraCalibrator class, providing all steps needed to apply calibration and image extraction, as well as supporting algorithms.

Classes

CameraCalibrator(**kwargs)

Calibrator to handle the full camera calibration chain, in order to fill the DL1 data level in the event container.

ctapipe.calib.camera.gainselection Module

Algorithms to select correct gain channel

Classes

GainChannel(value)	Possible gain channels
GainSelector(**kwargs)	Base class for algorithms that decide on the gain channel to use
ManualGainSelector(**kwargs)	Manually choose a gain channel.
ThresholdGainSelector(**kwargs)	Select gain channel according to a maximum threshold value.