Stick.py 文件源码

def get_sigma(self, models):
        r"""Returns the variance matrix

        variance is

        .. math::

            \Sigma_i = \sigma_t^2 + \frac{\sigma_x^2}{V_{CJ}}

        **Where**
            - :math:`\sigma_t` is the error in time measurements
            - :math:`\sigma_x` is the error in sensor position
            - :math:`V_{CJ}` is the detonation velocity

        see :py:meth:`F_UNCLE.Utils.Experiment.Experiment.get_sigma`

        """

        eos = self.check_models(models)[0]

        return np.diag(np.ones(self.shape()))