Function cart2sph

utils/losses.py:7–12

(x, y, z)

def cart2sph(x, y, z):
    hxy = np.hypot(x, y)
    r = np.hypot(hxy, z)
    el = np.arctan2(z, hxy)
    az = np.arctan2(y, x)
    return az, el, r

def get_random_lonlats(batch_size):
    """