Update README.md

Author: Dirack

README.md

@@ -11,10 +11,17 @@
 #### ✨ My contributions:
 
   - [Programs to Madagascar open-source seismic processing package](https://github.com/ahay/src/tree/master/user/dirack):
-    - **sfvfsacrsnh** is a C programs adapted to the Madagascar package. The main objective of this program is to optimize the zero offset Common Reflection Surface (CRS) parameters (RN, RNIP, BETA) that best fits a Non-hyperbolic CRS approximation surface with a reflection traveltime surface extracted from a seismic data cube
+    - **sfvfsacrsnh:** is a C programs adapted to the Madagascar package. The main objective of this program is to optimize the zero offset Common Reflection Surface (CRS) parameters (RN, RNIP, BETA) that best fits a Non-hyperbolic CRS approximation surface with a reflection traveltime surface extracted from a seismic data cube
 (seismic data organized in CMP x Offset X Time coordinates). The parameters optmization is achieved using Very Fast Simulated Aneelling (VFSA) global optimization algorithm. The result of that parameters optmization is used in CRS stacking and NIP tomography.
 
-    - **sfnhcrssurf** is a C programs adapted to the Madagascar package. The main objective of this programs is to build the Non-hyperbolic CRS surface using zero-offset CRS parameters obtained with _sfvfsacrsnh_ program.
+    - **sfnhcrssurf:** is a C programs adapted to the Madagascar package. The main objective of this programs is to build the Non-hyperbolic CRS surface using zero-offset CRS parameters obtained with _sfvfsacrsnh_ program.
+    
+    - **sfcrestack:** Common Reflection Element (CRE) stacking.
+    - **sfcretrajec:** Calculate CRE trajectory on CMP x Offset plane given zero-offset CRS parameters (RN, RNIP, BETA)
+    - **sfgetcregather:** Build CRE gather given CMP X Offset CRE trajectory coordinates and interpolated data cube- 
+    - **sfgetcretimecurve:** Calculate CRE traveltime curve t(m,h) given CRS zero-offset parameters (RN, RNIP, BETA)
+
+
 
 - New Madagascar Computational Recipes:
     - [kimodel.py](https://github.com/ahay/src/blob/master/book/Recipes/kimodel.py),