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NASA has a New Database to Predict Meteoroid Hazards for Spaceflight

June 4, 2024
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NASA has a New Database to Predict Meteoroid Hazards for Spaceflight
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There are many issues that spacecraft designers have to think about. Getting smacked within the delicate components by a rock is only one of them, however it’s a essential one. A micrometeoroid hitting the flawed a part of the spacecraft might jeopardize a whole mission, and the years of labor it took to get to the purpose the place the mission was really in house within the first place. However even when the engineers who design spacecraft learn about this threat, how is it greatest to keep away from them? A brand new programming library from analysis at NASA might assist.

Admittedly, engineers have already got a software for this goal. NASA’s Meteoroid Engineering Mannequin (MEM) permits them to plug in a deliberate trajectory for his or her spacecraft and obtain an output that defines the place and from which course they’re more likely to encounter micrometeoroids.

The James Webb Area Telescope is an ideal instance of why such a system is critical. On its option to the L2 Lagrange level, it has already suffered at the very least 20 micrometeoroid impacts, at the very least certainly one of which hit the house telescope’s main mirror, leaving a dent that also impacts the standard of its photos to today.

How do micrometeroids have an effect on spacecraft?
Credit score – Chris Pattison YouTube Channel

Resulting from such high-profile occurrences, spacecraft designers are already conscious of the dangers. Nevertheless, many don’t know their trajectories when designing their techniques. With no deliberate trajectory, the MEM is all however ineffective.

Enter Althea Moorhead from NASA’s Meteoroid Atmosphere Workplace at Marshall Area Flight Heart and her colleagues Katie Milbrandt from Auburn and Aaron Kingery from ERC, Inc., additionally primarily based at Marshall. They improved the MEM’s performance by introducing a library of identified spacecraft trajectories and the MEM outputs for every.

As a substitute of understanding their finish trajectory, spacecraft designers would be capable of merely take a look at the library and decide whether or not there are any vital dangers from meteoroids on any variety of potential trajectories. Particularly, the library contains information on orbital paths round each vital planet, some switch orbits, and at the very least two “halo” orbits, the place the spacecraft would benefit from the relative stability of a planet’s Lagrange factors.

How Webb offers with the micrometeroid impacts its already suffere.
Credit score – Launch Pad Astronomy

The output of the library permits for visualizations of the dangers the spacecraft would encounter, which is way simpler to know than advanced equations and possibilities for designers who don’t essentially specialise in micrometeoroid hazards. That was the unique impetus for growing the library – to offer generalists who don’t essentially have time to grok the small print of micrometeoroid location and dangers however nonetheless want to think about it as a part of their mission design.

The paper authors stress that the library shouldn’t be used for the formal threat evaluation that NASA requires of all missions destined for launch. That requirement can nonetheless be met by the MEM itself, together with a well-established orbit. However, if that orbit occurs to learn by the library described within the paper, all the higher for it.

Study Extra:
Moorhead, Milbrandt, & Kingery – A library of meteoroid environments encountered by spacecraft in the inner solar system
UT – NASA has a Plan to Decrease Future Micrometeoroid Impacts on JWST
UT – What Does Micrometeoroid Injury do to Gossamer Constructions Like Webb’s Sunshield?
UT – Ouch. Canadarm2 Took a Direct Hit From a Micrometeorite

Lead Picture:
Visualization of one of many trajectories deliberate out within the new micrometeroid library.
Credit score – Moorhead, Milbrandt, & Kingery

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