lsst.obs.test.testCamera.TestCamera Class Reference

Inheritance diagram for lsst.obs.test.testCamera.TestCamera:

Public Member Functions
def	__new__ (cls)
def	__init__ (self)

Detailed Description

A simple test Camera.

Notes
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The camera has one ccd with name "0".
That CCD has four amplifiers with names "00", "01", "10", and "11".

The camera is modeled after a small portion of the LSST sim
Summer 2012 camera: a single detector with four amplifiers,
consisting of raft 2,2 sensor 0,0, half of channels 0,0 0,1 1,0 and 1,1
(the half closest to the Y centerline).

Note that the Summer 2012 camera has one very weird feature:
the bias region (rawHOverscanBbox) is actually a prescan
(it appears before the data pixels).

A raw image has the sky in the same orientation on all amplifier
subregions, so no amplifier subregions need their pixels to be flipped.

Standard keys are:

* ``amp``: amplifier number: one of 00, 01, 10, 11
* ``ccd``: ccd number: always 0
* ``visit``: exposure number; test data includes one exposure
    with visit=1

Definition at line 31 of file testCamera.py.

Constructor & Destructor Documentation

__init__()

def lsst.obs.test.testCamera.TestCamera.__init__

(

self

)

Definition at line 75 of file testCamera.py.

    def __init__(self):
        pass
 

Member Function Documentation

__new__()

def lsst.obs.test.testCamera.TestCamera.__new__

(

cls

)

Definition at line 58 of file testCamera.py.

    def __new__(cls):
        plateScale = geom.Angle(20, geom.arcseconds)  # plate scale, in angle on sky/mm
        # Radial distortion is modeled as a radial polynomial that converts from focal plane (in mm)
        # to field angle (in radians). Thus the coefficients are:
        # C0: always 0, for continuity at the center of the focal plane; units are rad
        # C1: 1/plateScale; units are rad/mm
        # C2: usually 0; units are rad/mm^2
        # C3: radial distortion; units are rad/mm^3
        radialCoeff = np.array([0.0, 1.0, 0.0, 0.925]) / plateScale.asRadians()
        fieldAngleToFocalPlane = afwGeom.makeRadialTransform(radialCoeff)
        focalPlaneToFieldAngle = fieldAngleToFocalPlane.inverted()
 
        camera = cameraGeom.Camera.Builder("test")
        cls._makeDetectors(camera, focalPlaneToFieldAngle)
        camera.setTransformFromFocalPlaneTo(cameraGeom.FIELD_ANGLE, focalPlaneToFieldAngle)
        return camera.finish()
 

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The documentation for this class was generated from the following file:

• /j/snowflake/release/lsstsw/stack/1a1d771/Linux64/obs_test/20.0.0/python/lsst/obs/test/testCamera.py