Commandable Mobile ASW Simulator (CMAS) NASC-20-013a

Submarine-launched ballistic missile (SLBM) re-entry vehicles (RV), with carbon-carbon nosetips undergo significant aerothermal ablation during atmospheric re-entry.  Diagnostics are needed to measure recession rates and shape change to validate aerodynamic performance.  Numerous approaches have been utilized to instrument nosetips but almost all utilize intrusive, post-machining operations that compromise the structural integrity of the nosetip.  Exo-Atmospheric Technologies will develop a new ultrasonic recession gauge that utilizes a phased array sensor to provide measurements of recession rate and nosetip shape.  The phased array will be operated with a custom avionics package built specifically to integrate with US Navy aeroshell designs and legacy telemetry systems.  In Phase I the novel phased array sensor and backup single element ultrasonic sensing technology will be developed, integrated with the planned avionics, and validated through a series of bench-top tests including oxy-acetylene torch tests, furnace calibration tests, plasma-arc jet, and laser ablation tests.