Your helium-filled balloon will rise up to the edge of the stratosphere, crossing the boundary into Near Space.
As the balloon gets higher, the external pressure drops to less than 1% of ground level, causing the balloon to expand to the size of a double decker bus.
Meanwhile, your Astropod hangs below carrying and protecting your equipment.
Once the balloon bursts, the Astropod falls at 300km/h before the parachute opens out, slowing the descent to a safe speed of 5m/s.
After the Astropod lands, your flight computer guides you to the correct location for retrieval.