- second choice countermeasure of each investigator working on a different countermeasure
- continuous linear acceleration of the spacecraft requires propulsion systems not yet in existence to provide significant level or onboard artificial gravity
- continuous rotation of the spacecraft or part of the spacecraft is possible. Neuromotor side effects can be reduced by maximizing radius of rotation and minimizing required level of gravity
- so the big question is how much gravity is needed???
A continuous linear acceleration craft would accelerate to half of the ship and provide gravity so that the floor for the astronauts faces opposite the direction towards which the ship is being accelerated. So if the ship accelerates at 4.9 meters.sec-2,
Humans can learn to move around in an environment rotating at a few RPM without serious side effects. In a rotating spacecraft, the RPM level that the crew could tolerate would be maximized, while the required level of artificial gravity (still unknown)