testing_support.py 文件源码

def create_LOFAR_configuration(antfile: str, meta: dict = None) -> Configuration:
    """ Define from the LOFAR configuration file

    :param antfile:
    :param meta:
    :return: Configuration
    """
    antxyz = numpy.genfromtxt(antfile, skip_header=2, usecols=[1, 2, 3], delimiter=",")
    nants = antxyz.shape[0]
    assert antxyz.shape[1] == 3, "Antenna array has wrong shape %s" % antxyz.shape
    anames = numpy.genfromtxt(antfile, dtype='str', skip_header=2, usecols=[0], delimiter=",")
    mounts = numpy.repeat('XY', nants)
    location = EarthLocation(x=[3826923.9] * u.m, y=[460915.1] * u.m, z=[5064643.2] * u.m)
    fc = Configuration(location=location, names=anames, mount=mounts, xyz=antxyz, frame='global',
                       diameter=35.0)
    return fc