What aspect should be considered when designing a high power rocket to operate near or exceeding Mach 1?

When designing a high power rocket to operate near or exceeding Mach 1, ensuring the integrity of both accelerometer and pressure-sensor altimeters is crucial. At transonic and supersonic speeds, the rocket experiences substantial aerodynamic forces, and the behavior of altimeters can be affected by shock waves and changes in pressure. Accurately measuring altitude during these phases is essential for safe and effective flight, especially to prevent scenarios like "altimeter freezing," where sensors may fail to respond correctly due to rapid changes in air pressure. A reliable altitude measurement system not only helps in tracking the flight but also plays a vital role in recovery system deployment, which is crucial for ensuring the rocket can be retrieved safely after its flight. Proper integrity of these systems directly correlates with the safety and success of high-speed rocket operations.