diff --git a/components/isceobj/TopsProc/runIon.py b/components/isceobj/TopsProc/runIon.py
index bedfbaa..e2258ae 100644
--- a/components/isceobj/TopsProc/runIon.py
+++ b/components/isceobj/TopsProc/runIon.py
@@ -1680,8 +1680,6 @@ def computeDopplerOffset(burst, firstline, lastline, firstcolumn, lastcolumn, nr
 
     output: first lines > 0, last lines < 0
     '''
-    from scipy import interpolate
-    from scipy.interpolate import interp1d
 
     Vs = np.linalg.norm(burst.orbit.interpolateOrbit(burst.sensingMid, method='hermite').getVelocity())
     Ks =   2 * Vs * burst.azimuthSteeringRate / burst.radarWavelength 
@@ -1896,8 +1894,6 @@ def filt_gaussian(self, ionParam):
     currently not implemented.
     a less accurate method is to use ionsphere without any projection
     '''
-    from scipy import interpolate
-    from scipy.interpolate import interp1d
 
     #################################################
     #SET PARAMETERS HERE