los_integrator.py 文件源码

def __call__(self, sat_pos, args=(), **kwds):
        """
        Return the definite integral of *self.fun*(pos, *args*[0],
        ..., *args*[-1]) for the line of site from *stn_pos* to
        *sat_pos* (a :class:`PyPosition`) where pos is a
        :class:`PyPosition` on the line of site (and note the
        integration bounds on h defined in __init__). The remaining
        *kwds* are passed to the quadrature routine (:py:func:`quad`).
        """
        diff = NP.array(sat_pos.xyz) - NP.array(self.stn_pos.xyz)
        S_los = NP.linalg.norm(diff) / 1e3
        def pos(s):
            """
            Return the ECEF vector a distance *s* along the line-of-site (in
            [km]).
            """
            return PyPosition(*(NP.array(self.stn_pos.xyz) + (s / S_los) * diff))
        # determine integration bounds
        # distance along of line of site at which the geodetic height
        # is self.height1
        s1 = minimize_scalar(lambda l: (pos(l).height / 1e3 - self.height1)**2,
                             bounds=[0, S_los],
                             method='Bounded').x
        # distance along of line of site at which the geodetic height
        # is self.height2
        s2 = minimize_scalar(lambda l: (pos(l).height / 1e3 - self.height2)**2,
                             bounds=[0, S_los],
                             method='Bounded').x
        def wrapper(s, *args):
            return self.fun(pos(s), *args)
        return quad(wrapper, s1, s2, args=args, **kwds)[0]