Space Weather and Launch Vehicles Who Am I?

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Space Weather and Launch Vehicles Who Am I? Space Weather and Launch Vehicles Who am I? ❑ Ben Griffiths • 10 Years with United Launch Alliance • Currently at Ball Aerospace • Radiation Effects / Systems Engineer at both companies ❑ Standard Disclaimer • I am speaking from personal knowledge of this subject and my views do not represent any company that I currently or have previously worked for. 2 Launch Vehicle Picture ❑ “Expanded” View 3 The Three Main Issues With Space Weather ❑ Three main issues arise (or will soon) with Launch Vehicle electronics because of the space environment • Single Event Effects (SEE) • Disruption or destruction caused by the passage of a single heavy ion through sensitive regions of electronic piece parts • Total Ionizing Dose (TID) • Caused by energy deposited by ionization process in the target material • Displacement Damage Dose (DDD) • Displacement of atoms from the lattice of the target material ❑ What causes the above issues? Solar Weather • Van Allen Belts • Galactic Cosmic Rays • Atmospheric Neutrons • Electron Belts • Solar Flares 4 Orbital Types Low Earth Orbits (LEO) Weather LEO Satellites (~800 km) MetOp NOAA DMSP S-NPP Aqua/Terra LandSat Orbital Types Medium Earth Orbits (MEO) MEO Satellites (1000-30,000 km) GPS Orbital Types GeosynChronous Earth Orbits (GEO) GEO Weather (~36,000 km) GOES (AmeriCas) MSG (Europe) Himawari (Japan) Ground trace is stationary: Satellite orbits at same rate as earth turns (24-hr orbit) Orbital Types And where is the Moon? LEO (<1000 km) GEO Moon (~36,000 km) (384,000 km) MEO Supersynchronous orbit (1,000-10,000 km) (> 36,000 km) Where are we today? ❑ The vast majority of launches today are very short • 30 min - a few hours • RARELY half a day • Single-use upper stage • SEE are the primary concern ❑ Requirements do exist for Space Weather and Launch Commit Criteria • Early stages of satellite deployment • Space charging • Increased SEE 9 Where are we going? ❑ Longer and Longer Missions • Cis-Lunar 1000 • Multi-use upper stages • Moon • Mars • Astroids • Blurring of the line between Launch Vehicles and Satellites ❑ More missions at lower costs • More commercial-like parts • Smaller part features • Less margin All add up to greater impacts from space weather. 10.
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