diff --git a/schainpy/model/jrodataIO.py b/schainpy/model/jrodataIO.py
index 47e1a3b..5fb839c 100644
--- a/schainpy/model/jrodataIO.py
+++ b/schainpy/model/jrodataIO.py
@@ -213,6 +213,19 @@ def checkForRealPath(path, year, doy, set, ext):
 
     return fullfilename, filename
 
+def isDoyFolder(folder):
+    
+    try:
+        year = int(folder[1:5])
+    except:
+        return 0
+    
+    try:
+        doy = int(folder[5:8])
+    except:
+        return 0
+    return 1
+
 class JRODataIO:
     
     c = 3E8
@@ -339,8 +352,12 @@ class JRODataReader(JRODataIO, ProcessingUnit):
         else:
             dirList = []
             for thisPath in os.listdir(path):
-                if os.path.isdir(os.path.join(path,thisPath)):
-                    dirList.append(thisPath)
+                if not os.path.isdir(os.path.join(path,thisPath)):
+                    continue
+                if not isDoyFolder(thisPath):
+                    continue
+                
+                dirList.append(thisPath)
     
             if not(dirList):
                 return None, None