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3.2 Titan atmospheric descent: PRL Doppler effects

As the Probe enters the Titan atmosphere, it is subjected to a severe deceleration at an altitude 250 km that can be as high as 16.1 g. A parachute is deployed at a speed near Mach 1.5, marking the beginning of the descent phase (time = ). After the Probe slows to subsonic velocity, the heat shield is jettisoned (at + 30 s) and the PRL is established for transmission of data back to the Orbiter (no later than + 150 s). The large initial parachute is released at + 15 minutes and replaced by a smaller drogue parachute in order to decrease the descent time.

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