new versions of Equatorial LEO (ELEO) settlement papers available

Together these paper point the way to building small, easily accessible space settlements multiple orders of magnitude easier to construct than previous designs. The keys are to place settlements in Low Earth Orbit directly above the Equator (ELEO) where radiation levels are low and to rotate at up to 4 rpm, which can be easily tolerated after a few hours or days of adaptation.There are three main improvements in this version and many smaller ones:1. The first leg (Earth to LEO) of the SpaceX ITS (Interplanetary Transportation System) is projected to have almost exactly the characteristics necessary to support affordable ELEO settlements.2. A much expanded literature search still supports finding that little or no radiation shielding is necessary for ELEO settlements.3. There is a NASA developed training program that, in about six hours, can teach people to control motion sickness brought on by rotation.Heres the papers and short descriptions:"Space Settlement: an Easier Way,"by Al Globus, Stephen Covey, and Daniel Faber, January 2017 describes a relatively easy, incremental path to free space settlement by taking advantage of very low radiation levels in Equatorial Low Earth Orbit (ELEO) and higher rotation rates. Low levels of radiation in ELEO may permit settlements with little or no radiation shielding. Higher rotation rates permit much smaller settlements. Together this reduces settlement design mass by two to three orders of magnitude and places early settlements very close to Earth, radically reducing the difficulty of building the first space settlements and making launch from Earth practical. The mass model used in this paper is availablehereas an Excel spreadsheet. DOI: 10.13140/RG.2.1.3532.4406/1 http://space.alglobus.net/papers/Easy.pdf"Orbital Space Settlement Radiation Shielding,"Al Globus and Joe Strout, preprint, December 2016. The major result of this paper is that settlements in low (~500 km) Earth equatorial orbits may not require any radiation shielding at all based on a careful analysis of requirements and extensive simulation of radiation effects. This radically reduces system mass and has profound implications for space settlement as extraterrestrial mining and manufacturing are no longer on the critical path to the first settlements, although they will be essential in later stages. It also means the first settlements can evolve from space stations, hotels, and retirement communities in relatively small steps. DOI: 10.13140/RG.2.1.5072.5369/1http://space.alglobus.net/papers/RadiationPaper.pdf"Space Settlement Population Rotation Tolerance,"Al Globus and Theodore Hall, preprint, January 2017. This paper reviews the literature to find that space settlement residents and visitors can tolerate at least four, and probably six, rotations per minute to achieve 1g of artificial gravity. This means settlements can be radically smaller, and thus easier to build, than previously believed. DOI 10.13140/RG.2.1.2993.9041/1http://space.alglobus.net/papers/RotationPaper.pdf