diff --git a/pyat/czcore.py b/pyat/czcore.py
index 5e66740..7c25cec 100644
--- a/pyat/czcore.py
+++ b/pyat/czcore.py
@@ -94,7 +94,7 @@ def call_Bellhop(freq, sd, rd, bathm, ssp, sed, base):
     top = TopBndry(Opt_top)
     bdy = Bndry(top, bottom)
     # Beam params
-    run_type = 'C'  # incoherently sum beams, see AT docs for more info
+    run_type = 'I'  # incoherently sum beams, see AT docs for more info
     nbeams = 0
     alpha = np.linspace(-90, 90, 2)  # min and max launch angle -20 degrees to 20 degrees
     box = Box(Zmax, 100)  # bound the region you let the beams go, depth in meters and range in km
@@ -198,7 +198,8 @@ def find_cvgcRays(rays_total):
 def call_hjq(r, TL):
     TL_R = 20 * np.log10(r)
     out=[]
-
+    TL[np.isnan(TL)] = 0
+    TL_R[np.isnan(TL_R)] = 0
     dTL = (TL_R - TL) * (TL <= TL_R)
     dTL[np.isnan(dTL)] = 0
     test_fliter_s = savgol_filter(dTL, 103, 3)
@@ -212,10 +213,10 @@ def call_hjq(r, TL):
     czrangewidth_list = []
     for i in range(r_3,len(test_fliter)):
         czrangewidth = CzRangeWidth(0,0,0)
-        if(test_fliter[i]>=5):
+        if(test_fliter[i]>=3):
             out.append(i)
             if i+1<len(test_fliter):
-                if test_fliter[i+1]<5:
+                if test_fliter[i+1]<3:
                     m = r[out[0]]
                     n = r[out[len(out) - 1]]
                     l=n-m
@@ -241,8 +242,20 @@ def call_hjq(r, TL):
     # plt.plot(r,dTL)
     # plt.plot(r, test_fliter)
     # plt.gca().invert_yaxis()
-
     # plt.show()
+    
+    czlen=len(czrangewidth_list)-1
+    if czlen>=1:
+        for i in range(1,czlen,1):
+            if czrangewidth_list[i].minRange-czrangewidth_list[i-1].maxRange<=2000:
+                czrangewidth_list[i].minRange = czrangewidth_list[i-1].minRange
+                czrangewidth_list[i].width=czrangewidth_list[i].maxRange-czrangewidth_list[i].minRange
+                czrangewidth_list[i - 1]=0
+
+    while czrangewidth_list.count(0) > 0:
+        for j in czrangewidth_list:
+            if j == 0:
+                czrangewidth_list.remove(j)
     return czrangewidth_list