Orion Program Update:Gateway Milestones

On 5 January 2023,NASA announced that technicians at the NASA Michoud Assembly Facility,New Orleans,had finished welding the pressure vessel,or backbone,of the Orion Multi-Purpose Crew Vehicle (MPCV),or capsule, for the Artemis IV mission,the first crewed mission to the Gateway lunar space station.Gateway's two initial components,the Habitation and Logistics Outpost (HALO) and the Power and Propulsion Element (PPE) are being designed and constructed by Northrop Grumman and Maxar Technologies,respectively.Earlier,on 3 January,a new Gateway mockup was delivered to NASA Kennedy Space Center,to facilitate astronaut training on HALO systems.Gateway will be the most distant space station ever built,flying in a near-rectilinear lunar orbit,so crews will need extensive training on its operations.* The Co-manifested Launch Vehicle (CLV),referring to the HALO and the PPE,will be launched on a SpaceX Falcon Heavy rocket at KSC Launch Complex 39A no earlier than November 2024.Future Gateway modules will include the European Space Agency (ESA)/Japanese Aerospace Exploration Agency (JAXA) International Habitation module (I-HAB),which will increase the station's habitability capacity from its initial 30 days up to 60 days;the ESA ESPRIT-Refueler;and further logistics modules.The Canadian Space Agency (CSA) will provide the Gateway External Robotics System (GERS) called Canadarm3.Indeed,one of the four Artemis IV astronauts will be a Canadian.The Blue Origin Human Landing System (HLS) that will potentially transport astronauts on Gateway to the lunar surface is being co-developed by Blue Origin,Northrop Grumman,Lockheed Martin and The Charles Stark Draper Laboratory;while the SpaceX Starship has been selected to transport astronauts to the lunar surface for NASA'S initial lunar landing of the Artemis III return to the moon mission.NASA will award future lunar landing contracts on a competitive basis after Artemis III.* Gateway will provide unique science capabilities,allowing extended views of Earth,Sun,Moon and space not possible from Earth's surface or Low Earth Orbit (LEO).Two of the first three experiments for Gateway will be attached to the station's exterior.They will monitor the Sun's radiation environment and space weather,respectively;while a third experiment will fly inside HALO to study radiation shielding effects and improve radiation physics models for cancer,cardiovascular and central nervous system effects,helping assess crew risk on deep space exploration missions.At the same time,International Space Station missions will continue to be flown.* In HALO,there are accomodations for storing food,water,tools and experiments,plus space for exercise and sleep.It also provides a safe and healthy atmosphere,regulating proper rates of oxygen and nitrogen,while filtering the air for contaminent removal.ESA is providing the HALO Lunar Communication System (HLCS).* The Gateway will be a staging point for sustained lunar exploration and extensibility towards long-term lunar and solar system exploration.HALO itself is 3 meters/9.84 feet in diameter and has three docking ports.It features Time-Triggered Ethernet (TTE) for seamless integration of modules,payloads and subsystem components.* Lockheed Martin (LMT),Maxar Technologies Inc (MAXR), Northrop Grumman (NOC)