testing_support.py 文件源码

def create_configuration_from_file(antfile: str, name: str = None, location: EarthLocation = None,
                                   mount: str = 'altaz',
                                   names: str = "%d", frame: str = 'local',
                                   diameter=35.0,
                                   meta: dict = None,
                                   rmax=None, **kwargs) -> Configuration:
    """ Define from a file

    :param names:
    :param antfile: Antenna file name
    :param name: Name of array e.g. 'LOWBD2'
    :param location:
    :param mount: mount type: 'altaz', 'xy'
    :param frame: 'local' | 'global'
    :param diameter: Effective diameter of station or antenna
    :param meta: Any meta info
    :return: Configuration
    """
    antxyz = numpy.genfromtxt(antfile, delimiter=",")
    assert antxyz.shape[1] == 3, ("Antenna array has wrong shape %s" % antxyz.shape)
    if frame == 'local':
        latitude = location.geodetic[1].to(u.rad).value
        antxyz = xyz_at_latitude(antxyz, latitude)
    if rmax is not None:
        lantxyz = antxyz - numpy.average(antxyz, axis=0)
        r = numpy.sqrt(lantxyz[:, 0] ** 2 + lantxyz[:, 1] ** 2 + lantxyz[:, 2] ** 2)
        antxyz = antxyz[r < rmax]
        log.debug('create_configuration_from_file: Maximum radius %.1f m includes %d antennas/stations' %
                  (rmax, antxyz.shape[0]))

    nants = antxyz.shape[0]
    anames = [names % ant for ant in range(nants)]
    mounts = numpy.repeat(mount, nants)
    fc = Configuration(location=location, names=anames, mount=mounts, xyz=antxyz, frame=frame,
                       diameter=diameter)
    return fc