27 from lsst.afw.cameraGeom
import FOCAL_PLANE, FIELD_ANGLE
29 __all__ = [
"CameraTests"]
33 """Tests that the butler returns a useable Camera.
35 In the subclasses's setUp():
36 * Call setUp_camera() to fill in required parameters.
42 first_detector_name=None,
45 """Set up the necessary variables for camera tests.
53 number of detectors in this camera
54 first_detector_name : `str`
55 name of the first detector in this camera
56 plate_scale : `lsst.geom.Angle`
57 plate scale at center of focal plane, as angle-on-sky/mm
59 fields = [
'camera_name',
61 'first_detector_name',
64 CameraData = collections.namedtuple(
"CameraData", fields)
65 self.
camera_datacamera_data = CameraData(camera_name=camera_name,
66 n_detectors=n_detectors,
67 first_detector_name=first_detector_name,
68 plate_scale=plate_scale,
72 """Simplest camera test: can we get a Camera instance, and does
73 iterating return Detectors?"""
74 camera = self.butler.get(
'camera', immediate=
True)
75 self.assertIsInstance(camera, lsst.afw.cameraGeom.Camera)
76 for detector
in camera:
77 msg =
"Failed for detector={}".format(detector)
78 self.assertIsInstance(detector, lsst.afw.cameraGeom.Detector, msg=msg)
81 """Check that the butler returns the right type of camera."""
82 camera = self.butler.get(
'camera', immediate=
True)
83 self.assertEqual(camera.getName(), self.
camera_datacamera_data.camera_name)
84 self.assertEqual(len(camera), self.
camera_datacamera_data.n_detectors)
85 self.assertEqual(next(iter(camera)).getName(), self.
camera_datacamera_data.first_detector_name)
88 """Check the plate scale at center of focal plane
90 Check plate_scale using the FOCAL_PLANE to FIELD_ANGLE transform
93 plate_scale = self.
camera_datacamera_data.plate_scale
94 self.assertIsNotNone(plate_scale)
95 camera = self.butler.get(
'camera', immediate=
True)
96 focalPlaneToFieldAngle = camera.getTransformMap().getTransform(FOCAL_PLANE, FIELD_ANGLE)
97 focalPlaneRadiusMm = 0.001
98 for offsetAngleRad
in (0.0, 0.65, 1.3):
99 cosAng = math.cos(offsetAngleRad)
100 sinAng = math.sin(offsetAngleRad)
101 fieldAngleRadians = focalPlaneToFieldAngle.applyForward(
102 lsst.geom.Point2D(cosAng * focalPlaneRadiusMm, sinAng * focalPlaneRadiusMm))
103 fieldAngleRadius = math.hypot(*fieldAngleRadians) * lsst.geom.radians
104 measuredScale1 = fieldAngleRadius / focalPlaneRadiusMm
105 self.assertAnglesAlmostEqual(measuredScale1, plate_scale)
107 focalPlanePos = focalPlaneToFieldAngle.applyInverse(
108 lsst.geom.Point2D(fieldAngleRadius.asRadians() * cosAng,
109 fieldAngleRadius.asRadians() * sinAng))
110 focalPlaneRadiusMm2 = math.hypot(*focalPlanePos)
111 measureScale2 = fieldAngleRadius / focalPlaneRadiusMm2
112 self.assertAnglesAlmostEqual(measureScale2, plate_scale)
def test_camera_butler(self)
def setUp_camera(self, camera_name=None, n_detectors=None, first_detector_name=None, plate_scale=None)
def test_plate_scale(self)