ISRO has commissioned two facilities, a Hypersonic Wind Tunnel and Shock Tunnel at the Vikram Sarabhai Space research Centre in Thiruvananthapuram as part of its continuous and concerted efforts to minimize the cost of access to space. The one-meter Hypersonic Wind Tunnel and one meter Shock Tunnel have been established with a wide spectrum of simulation capabilities in terms of Mach number, Reynolds number and re-entry velocities.