Instructions for compiling simulator added-

doc/local_ros_installation.md

@@ -200,3 +200,29 @@ and the control mode must be:
 
 
 
+## Compiling Simulator
+
+If you have access ti the simulator repos you can compile it locally.
+
+Needed extra packages:
+```bash
+git clone git@gitlab.liu.se:lrs/lrs_basic.git
+git clone git@gitlab.liu.se:lrs/motion_models.git
+git clone git@gitlab.liu.se:lrs/nonlinearmpc.git
+git clone https://github.com/dji-sdk/Onboard-SDK-ROS.git
+cd Onboard-SDK-ROS
+git checkout 3.8
+```
+
+Install the DJI SDK:
+```bash
+git clone https://github.com/dji-sdk/Onboard-SDK.git
+cd Onboard-SDK
+git checkout 3.8
+cd osd-core
+mkdir build
+cd build
+cmake ../
+make -j 4 djiosdk-core
+sudo make install djiosdk-core
+```