modify PSF interp for DiretImgSLS

            if bandpass.blue_limit < bandwave and bandwave < bandpass.red_limit:

                return twave

        return -1

    def _findWave_sencondary(self, bandpass):

        w_dist = np.zeros(self.nwave)

        for twave in range(self.nwave):

            bandwave = self.PSF_data[twave][0]['wavelength']

            d1 = bandwave - bandpass.blue_limit

            d2 = bandwave - bandpass.red_limit

            if d1 * d2 <= 0:

                w_dist[twave] = 0

            else:

                w_dist[twave] = np.min([abs(d1), abs(d2)])

        minTwawe = np.where(w_dist == np.min(w_dist))

        return minTwawe[0][0]

    def get_PSF(self, chip, pos_img, bandpass, galsimGSObject=True, findNeighMode='treeFind', folding_threshold=5.e-3, pointing_pa=0.0):

        """

        assert self.iccd == int(chip.getChipLabel(chipID=chip.chipID)), 'ERROR: self.iccd != chip.chipID'

        twave = self._findWave(bandpass)

        if twave == -1:

            print("!!!PSF bandpass does not match.")

            exit()

            twave = self._findWave_sencondary(bandpass)

        PSFMat = self.psfMat[twave]

        cen_col= self.cen_col[twave]

        cen_row= self.cen_row[twave]