1.2.4. Crater base
· Partially protected against radiation sources (SW). Base level below horizon.
· Easy to set up. Minimum excavations needed (for foundations only).
· Difficult access to other Martian destinations. Crater exit structures needed.
· Possible poor quality of ground due to crater’s meteoroid impact origin.
Considering future evolution on material shielding against radiation, the option chosen is the Surface Base that will provide maximum benefits to the first phase Gen 1.5 and future growing of Gen II. However excavations will be required and thus the project takes advantage of that situation by opening some courtyards. Detail explanation on that can be found at the Gen1.5 Settlement Description Chapter.
1.2.3. Hill base
· Partially protected against radiation sources (GCR&SW) and micrometeoroid impacts. At least one side open to atmosphere.
· Difficult to set up. Large volume of excavation needed.
· Rigid scheme for future growing.
1.2.2. Underground base
· Protected against radiation sources (GCR&SW) and micrometeoroid impacts.
· Difficult to set up. Maximum volume of mining needed.
1.2.1. Surface base
· Easy to set up. Minimum excavations needed.
· Easy access to other Martian destinations.
· Exposed to radiation (GCR&SW) and micrometeoroid impacts.
Different positions are considered.
· Surface base where entire structure is situated above existing Mars surface.
· Underground base where entire structure is situated below Mars surface.
· Hill base where entire structure is situated underground inside a natural/artificial hill.
(Previous Gen 1.0 studies chosen option).
· Crater base where entire structure is situated in a meteoroid impact created crater.
1.1. Site: Meridiani Crater
· Situation: 2ºS 354.5ºE. Close to Equator for launch and landing operations.
· Height: -1500m. Larger layer of Martian atmosphere offers better radiation protection and higher atmospheric pressure, therefore less gradient of pressure between conditioned indoors and outdoors.