People from Earth to Mars in 30 days

It is possible using a combination of electric and chemical propulsion to send people in a rocket from Earth to Mars in 30 days. The electric portion of the system would accelerate nine refueling depots to prepositioning orbits. The chemical rocket with a human crew would rendezvous with each of the nine refueling depots, adding about 3056 meters per second in each of ten burns. This would follow an orbit of the same shape as a Hohmann transfer orbit between Mercury and Saturn, but oriented in the solar system to intersect Earth's and Mars' orbits. The change in velocity (delta v) necessary to change from Earth's orbit to the transfer orbit is 30,561 meters per second. There are probably transfer orbits that more efficiently use delta v and can make the 30 day transfer with less than nine refuelings. The fuel transfer technology still needs to be developed and practiced to be sure that the fuel transfers and rocket restarts are accomplished without fail, lest the crew be stranded en route. The prepositioning of the fuel depots would begin about ten years before the human crew is launched.