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Flemming Hansen MScEE, PhD Technology Manager Danish Small Satellite Programme

S atellite Technology Course Space Environment. Flemming Hansen MScEE, PhD Technology Manager Danish Small Satellite Programme Danish Space Research Institute Phone: 3532 5712 Mobile: 2177 5712 E-mail: fh@dsri.dk. Downloads available from: http://www.dsri.dk/roemer/pub/sat_tech.

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Flemming Hansen MScEE, PhD Technology Manager Danish Small Satellite Programme

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  1. Satellite Technology CourseSpace Environment Flemming Hansen MScEE, PhD Technology Manager Danish Small Satellite Programme Danish Space Research Institute Phone: 3532 5712 Mobile: 2177 5712 E-mail: fh@dsri.dk Downloads available from: http://www.dsri.dk/roemer/pub/sat_tech RØMER 3D Model by Jan Erik Rasmussen, DSRI Space_Environment.ppt

  2. Overview of the Space Environment External Factors Residual atmosphere (up to 800 km)- Drag causes orbit decay and reentry Trapped protons - Degrades materials and electronic components, causes single-event effects in semiconductor components. Trapped electrons - Degrades materials and electronic components Solar protons from flares - Degrades materials and electronic components, causes single-event effects in semiconductor components. Cosmic rays - causes single-event effects in semiconductor components. Solar radiation: IR, Visible, UV, X-Ray - Degrades materials Plasma from magnetic substorms - Causes spacecraft charging Atomic oxygen - Erodes exposed surfaces Local Factors Outgassing - Deposits on cold surfaces, e.g. optical apertures. Space_Environment.ppt

  3. Earth’s Radiation Belts Trapped Protons Trapped Electrons Space_Environment.ppt

  4. Effects of High-Energy Charged Particles in the Space Environment • Biological effects (Prolonged exposure of astronauts in MIR and International Space Station) Shielding, return to ground in case of majorsolar flares • Degradation of materials and semiconductors by ionization and lattice displacements Materials selection, radiation hardening, shielding • Single-Event Upsets in computer memory cells Error Detection and Correction (EDAC), radiation hardening • Radiation background (Increased noise level in CCD, X-ray and gamma-ray detectors)  Radiation hardening, shielding, select orbit outside or inside radiation belts, disable payload while passing through radiation belts Space_Environment.ppt

  5. Calculation of Effects of Ionizing Radiation in the Space Environment ESA has created a web-facility - SPENVIS that gives the user acess to a number of useful modeling and calculation resources – see SPENVIS opening vindow at right You have to be a registered user to gain access to the facility. http://www.spenvis.oma.be/spenvis/ Space_Environment.ppt

  6. Radiation in Syn-Synchronous Polar Low Earth Orbit Space_Environment.ppt

  7. Radiation in Molniya Orbit (RØMER) Space_Environment.ppt

  8. Radiation Environment in Molniya Orbit - Trapped Proton Fluxes Along Orbit Space_Environment.ppt

  9. Radiation Environment in Molniya Orbit - Trapped Electron Fluxes Along Orbit Space_Environment.ppt

  10. Radiation Environment in Geostationary Transfer Orbit, 28.5° Inclination Space_Environment.ppt

  11. Radiation Environment in Molniya Orbit - Trapped Proton Fluxes Along Orbit Space_Environment.ppt

  12. ØRSTED Magnetic Field Model Today’s Field South-Atlantic Anomaly (SAA) Changes Since 1980 Space_Environment.ppt

  13. Effects of South-Atlantic Anomaly - 1 Ørsted Single-Event Upsets Space_Environment.ppt

  14. Effects of South-Atlantic Anomaly - 2 UoSAT-3 Single-Event Upsets Space_Environment.ppt

  15. Radiation Dose Tolerance of Materials Space_Environment.ppt

  16. Solar Flares Protons above 10 MeV Probability of exceeding a given fluence level for various mission durations Major Solar Flare Space_Environment.ppt

  17. Cosmic Rays Effect of high-energy charged particle in integrated circuit Cosmic ray species vs particle energy Space_Environment.ppt

  18. Single-Event Latch-Up Two-transistor model for latch-up in CMOS device showing parasitic elements Latch-up protection circuit for ADSP-2100 digital signal processor Space_Environment.ppt

  19. Typical Radiation Tolerences of Rad Hard and COTS Parts COTS: Commercial Off-the-Shelf (parts) Space_Environment.ppt

  20. Linear Energy Transfer (LET) Spectra in Orbit Space_Environment.ppt

  21. Single-Event Upset - Linear Energy Transfer Threshold Radiation Soft Radiation Hard Space_Environment.ppt

  22. Single-Event Upset Protection Methods Space_Environment.ppt

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