(1+a_EM)                                (1+a_EM)                           (1+a_EM)(1+c_EM_i) 
                      k * EM_Et_z0 * --------           Off + k * EM_Et_z0 * --------         Off + k * EM_Et * ------------------ 
                                     (1+b_EM)                                (1+b_EM)                                (1+b_EM)      
                                                                                       +-------------------+                        
                               |                                   |                   | PROM              |       |               
                               |                  +---+            |                   |cut, offset,       |       |               
                   +-+         v         +-+      | A |            v                   |vertex correction: |       v               
EM_E * (1+a_EM) ---|X|-------------------|+|------| D |--------------------------------|  sin(theta_zi)    |---------------        
                   +-+                   +-+      | C |     |                          |  -------------    |                       
                    |                     |       +---+     |                          |  sin(theta_z0)    |                       
            +-------------------+         |                 |                          |tweak: c_EM_i      |                       
            | k * sin(theta_z0) |      +-----+              |                          +-------------------+                       
            | ----------------- |      | Ped |              |                                                                       
            |    (1+b_EM)       |      +-----+              |                                                                       
            +-------------------+                           |                                                                      
                                                            |                                                                      
                                                            |                                                                      
                                                          +---+                                                                    
                                                          |   |       +-------------+                                              
                                                          | + |-------| PROM Px, Py |----                                          
                                                          |   |       +-------------+                                              
                                                          +---+                                                                    
                                                            |                                                                      
                                                            |                                                                      
            +-------------------+                           |                                                                      
            | k * sin(theta_z0) |      +-----+              |                                                                      
            | ----------------- |      | Ped |              |                                                                      
            |    (1+b_HD)       |      +-----+              |                          +-------------------+                       
            +-------------------+         |                 |                          | PROM              |                       
                    |                     |       +---+     |                          |cut, offset,       |                       
                   +-+                   +-+      | A |     |                          |vertex correction: |                       
HD_E * (1+a_HD) ---|X|-------------------|+|------| D |--------------------------------|  sin(theta_zi)    |---------------        
                   +-+          ^        +-+      | C |            ^                   |  -------------    |       ^               
                                |                 +---+            |                   |  sin(theta_z0)    |       |               
                                |                                  |                   |tweak: c_HD_i      |       |               
                                                                                       +-------------------+                       
                                     (1+a_HD)                                (1+a_HD)                           (1+a_HD)(1+c_HD_i) 
                      k * HD_Et_z0 * --------           Off + k * HD_Et_z0 * --------         Off + k * HD_Et * ------------------ 
                                     (1+b_HD)                                (1+b_HD)                                (1+b_HD)