It is not a Launch Pad but rather a rocker sled used for testing missiles etc. Very few countries in the world have this faclity.
Rocket sleds are used to accelerate equipment considered too experimental (hazardous) for testing directly in piloted aircraft. The equipment to be tested under high acceleration or high airspeed conditions is installed along with appropriate instrumentation, data recording and telemetry equipment on the sled. The sled is then accelerated according to the experiment's design requirements for data collection along a length of isolated, precisely level and straight test track.