diff --git a/Flow_class.py b/Flow_class.py
index 685f094ba040b24f02b376bfa8ff67372c7e367d..646e2b073349543ea56f26ce82c34a3357ab754c 100644
--- a/Flow_class.py
+++ b/Flow_class.py
@@ -66,29 +66,6 @@ def do_reconstruct_path(A,phi,Nmodes=0,umean = 0):
     return umean + np.real(u_tilde)
 
 
-def get_POD_coeffs(rk,dist,interpol_list,inttype):
-    # A is the coefficient matrix that is recovert from interpolation A.shape[1] must be number of used modes 
-    rk    = np.array(rk)
-    dist  = np.array(dist)
-    A = np.zeros((*rk.shape,len(interpol_list) ))
-    if len(A.shape) == 1: 
-        A = A.reshape(1,A.shape[0])
-    A = A.T
-    #
-    for i, inter_i in enumerate(interpol_list):
-        if inttype == "lin":
-            A[i]  = inter_i((rk,dist)).T
-        elif inttype == "rbf":
-            A[i]  = inter_i(rk,dist).T
-        elif inttype == "spline":
-            A = np.zeros((rk.size,dist.size,len(interpol_list) ))
-            if len(A.shape) == 1: 
-                A = A.reshape(1,A.shape[0])
-            A = A.T
-            # print(A.shape)
-            A[i] = inter_i(rk,dist).T
-    return A.T
-
 
 def do_reconstruct_add(A,phi,Nmodes,u_tilde,umean = 0):
     #u_tilde = np.zeros((A.shape[0],phi.shape[0]))
diff --git a/GUI_Elbow.py b/GUI_Elbow.py
index 57ce6f88d59314be7adbc8c322acafdf64af2019..4146b6b23fd71d1d4c99dde217f60cf9c4020fe6 100644
--- a/GUI_Elbow.py
+++ b/GUI_Elbow.py
@@ -1040,12 +1040,10 @@ class mainPanel(wx.Panel):
             all_phi = phi
         #
         if flow.case ==  "SingleElbow":
-            # gather all 
+            # gather all parameters and maka the ND-Matrixes
             rcgrid, distgrid, phigrid = np.meshgrid(all_Rc,all_dist,all_phi,indexing='ij')
-            # ugrid = flow.get_profile(distgrid,rcgrid)
             all_fm = self.regint_fm((rcgrid,distgrid,phigrid))
-            # flatten the first two dimensions
-            # ugrid   = ugrid.reshape(-1,*ugrid.shape[2:])
+            #
         else: 
             # also variate the inbetween distance dl
             if self.dl_u > 0:
@@ -1054,8 +1052,7 @@ class mainPanel(wx.Panel):
                 all_dl = np.linspace(lim0,lim1 , Ndl)
             else: 
                 all_dl = dl
-            # and ghater all
-            
+            # gather all parameters and maka the ND-Matrixes
             rcgrid,dlgrid, distgrid, phigrid = np.meshgrid(all_Rc,all_dl,all_dist,all_phi,indexing='ij')
             # ugrid = flow.get_profile(distgrid,rcgrid)
             print("discretisation: " + str(rcgrid.shape))
diff --git a/README.md b/README.md
index d4a79f5cad9746ccf48d51b171ced8d22525a43a..e4f28cf5ddfe50dc3352991aeb494f4308b452ae 100644
--- a/README.md
+++ b/README.md
@@ -1,17 +1,21 @@
 # VirtFlow_GUI
 
-A User Interface, which enables the inspection of velocity profiles downstream of a single elbow with parameter variation of: 
+To use just start  **GUI_Elbow.py** in a python3 environment. Necessary packages: Numpy, Scipy, json
 
-- curvature radius (between 0.51 to 10 times the diameter (D))
-- downstream distances (from 0 to 95 D)
+## Functionality
+
+A User Interface, which enables the inspection of velocity profiles downstream of a single elbow, double elbow out-of-plane, and double-S-elbow, with parameter variation of: 
+
+- curvature radius (between 0.51 to 10 times the diameter (D) for the single elbow, and 0.51 to 5.51 for the other cases)
+- downstream distances (from 0 to 100 D)
 - Reynolds numbers (from 5e4 to 1e6)
 - pipe wall roughness (from 0 to ?? ks/D)
-- angular path (from -pi to pi)
-
+- angular path (from -180 to 180)
 
-## To do:
+Ultrasonic flow meters can be evaluated at the moment only for diametral paths with any number of reflections
+Uncertainties can be evaluated by quasi monte carlo 
 
-- uncertainty for each and all parameter
-- flow meter kalibration/correction factor calculation
-- interpolation in the xy-space
-- extension to two elbows in a row (out-of- and in-plane)
\ No newline at end of file
+## ToDo:
+- Ultrasonic non-diagonal paths therefore interpolation of the modes is necessary
+- Electro-Magnetic flow meters
+- deletion of unused functions 
\ No newline at end of file
diff --git a/test.py b/test.py
deleted file mode 100644
index a1d99c1e064ccdf3fefc1a5395a2a0efbe788a76..0000000000000000000000000000000000000000
--- a/test.py
+++ /dev/null
@@ -1,47 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-Created on Tue Aug  9 13:07:03 2022
-
-@author: weisse02
-"""
-
-import wx 
- 
-class Example(wx.Frame): 
-   
-   def __init__(self, parent, title): 
-      super(Example, self).__init__(parent, title = title, size = (200,300)) 
-             
-      self.InitUI() 
-      self.Centre() 
-      self.Show()
-		
-   def InitUI(self): 
-      p = wx.Panel(self) 
-      vbox = wx.BoxSizer(wx.VERTICAL) 
-      l1 = wx.StaticText(p,label = "Enter a number",style = wx.ALIGN_CENTRE ) 
-      vbox.Add(l1,0,  wx.ALL|wx.EXPAND, 20) 
-      
-      
-      b1 = wx.Button(p, label = "Btn1") 
-      vbox.Add(b1,1,wx.SHAPED) 
-          
-      b2 = wx.Button(p, label = "Btn2") 
-      vbox.Add(b2,0, wx.RESERVE_SPACE_EVEN_IF_HIDDEN) 
-      
-      
-      t = wx.TextCtrl(p) 
-      vbox.Add(t,1,wx.EXPAND,10) 
-      hbox = wx.BoxSizer(wx.HORIZONTAL) 
-      l2 = wx.StaticText(p,label = "Label2", style = wx.ALIGN_CENTRE) 
-		
-      hbox.Add(l2,0,wx.EXPAND) 
-      b3 = wx.Button(p,label = "Btn3") 
-      hbox.AddStretchSpacer(1) 
-      hbox.Add(b3,0,wx.ALIGN_LEFT,20) 
-      vbox.Add(hbox,1,wx.ALL|wx.EXPAND) 
-      p.SetSizer(vbox) 
-          
-app = wx.App() 
-Example(None, title = 'BoxSizer demo') 
-app.MainLoop()
\ No newline at end of file
diff --git a/test_reg.npz b/test_reg.npz
deleted file mode 100644
index 717ddd53fdda347f5a6d2d10325183aeccc7fafb..0000000000000000000000000000000000000000
Binary files a/test_reg.npz and /dev/null differ