  We have examined the interstellar scintillations of the pulsars in the double
pulsar binary system. Near the time of the eclipse of pulsar A by the
magnetosphere of B, the scintillations from both pulsars should be highly
correlated because the radiation is passing through the same interstellar
plasma. We report confirmation of this effect using 820 and 1400 MHz
observations made with the Green Bank Telescope. The correlation allows us to
constrain the projected relative position of the two pulsars at closest
approach to be 4000 +/- 2000 km, corresponding to an inclination that is only
0.29 +/-0.14 degrees away from 90 degrees. It also produces a two-dimensional
map of the spatial correlation of the interstellar scintillation. This shows
that the interstellar medium in the direction of the pulsars is significantly
anisotropic. When this anisotropy is included in the orbital fitting, the
transverse velocity of the center of mass is reduced from the previously
published value of 141 +/- 8.5 km/s to 66 +/- 15 km/s.
