Discussion · 𑐴𑐶𑐟𑐶

Spaceflight 🚀 @spaceflight@spacey.space · 3 weeks ago

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By Giusy Falcone Dec 2021 https://gfalcon2.web.illinois.edu

With a 6 m/s increase in the Delta-V budget, the deep reinforcement learning approach shortened the #aerobraking time by 68.3% 📉. The DRL algorithm does not encounter any thermal violations over 40 episodes compared to the 2.8 average thermal violations experienced by the state-of-the-art heuristic https://arc.aiaa.org/doi/10.2514/6.2022-2497

Spaceflight 🚀 @spaceflight@spacey.space · 2 weeks ago

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From Earth to #Mars lasts about 200 days. To safely go from those speeds down to zero in that short amount of time requires “slamming on the brakes”. Successful #aerobraking depends upon precise navigation, knowledge of weather, and a solid understanding of the forces the craft can withstand. https://science.nasa.gov/planetary-science/programs/mars-exploration/mission-timeline

#navigation #automation #SpaceNavigation

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Spaceflight 🚀 @spaceflight@spacey.space · 3 weeks ago

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Parachute 🪂 is not the only means for descent, as high-mass class vehicles are emerging for human 👩‍🚀 missions. Shallow entry flight-path angles are preferred in order to achieve a lower terminal velocity to ensure a safe descent phase. Retro-propulsion could be activated at Mach 2 and above https://www.intechopen.com/chapters/72944#

#aerocapture #aerobraking #AtmosphericEntry #Mars #Starship

Spaceflight 🚀 @spaceflight@spacey.space · 3 weeks ago

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#AMAT allows the user to simulate #atmospheric entry trajectories, compute deceleration and heating🌡️loads, compute aerocapture entry corridors and simulate aerocapture trajectories. AMAT supports analysis for all #atmosphere-bearing destinations in the #SolarSystem: #Venus, #Earth, #Mars, #Jupiter, #Saturn, #Titan, #Uranus, and #Neptune https://amat.readthedocs.io/en/master

#aerocapture #aerobraking #AtmosphericEntry

Spaceflight 🚀 @spaceflight@spacey.space · 3 weeks ago

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As the #spacecraft approaches Mars 🔴, it will need to perform a capture burn 🔥 to slow down and be captured by Mars' gravity. This requires a delta-v of about 0.7 to 1.3 km/s to enter Mars' orbit or to land on the planet's surface. #Starship 🚀 will enter #Mars’ atmosphere at 7.7 km/sec and decelerate #aerodynamically https://www.uc.edu/content/dam/refresh/cont-ed-62/olli/fall-23-class-handouts/SpaceX%208%20%20Mars%20%20Vision%20Summary.pdf

#aerobraking

A 𑐴𑐶𑐟𑐶 (hiti) is an ancient Newah urban water feature: a stepped, sunken courtyard with waterspouts and a central pool. These are fed through a remarkable network of pipes, reservoirs, and irrigation systems drawing water from mountain springs dozens of kilometres away. Every day, hundreds of people from the neighbourhood come to draw water, bathe, and exchange news. They are a unique and precious feature of Newa urban architecture through which neighbourhoods are created.

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