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X-Ray Gratings Mission

X-Ray Gratings Mission. Orbital Debris and End of Mission Plans Ivonne Rodriguez 19 – 23 March 2012. Orbital Debris Requirements per NASA-STD-8719.14: Most Requirements Do not Apply to L2 Missions. (See Backup charts for complete requirements). Conclusions and Comments.

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X-Ray Gratings Mission

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  1. X-Ray Gratings Mission Orbital Debris and End of Mission Plans Ivonne Rodriguez 19 – 23 March 2012

  2. Orbital Debris Requirements per NASA-STD-8719.14: Most Requirements Do not Apply to L2 Missions (See Backup charts for complete requirements)

  3. Conclusions and Comments • No issues in terms of orbital debris and end of mission plans. • Most orbital debris and end of mission plans requirements do not apply to Lagrange points, although NASA has interest in protecting their environment for future missions. • It is recommended to release the aperture cover far from Earth orbit, so it does not come close to GEO. Otherwise it will be subject to orbital debris requirements (Less than 25 years of orbital lifetime in LEO or stay above GEO for at least 100 years). • Spacecraft passivation of energy sources at End of Mission (EOM) is not required, but it is a good practice. • Similarly, there is no specific requirement to remove the spacecraft from L2 after EOM, but giving a gentle “push” at EOM to help the spacecraft to drift away from L2 is a good practice. Additionally, it makes easier to prove that the spacecraft will not come back to Earth vicinity. • All of the above applies to both OP and CAT configurations.

  4. Backup charts

  5. Requirements

  6. 4.3 Assessment of Debris Released During Normal Operations

  7. 4.4 Assessment of Debris Generated by Explosions and Intentional Breakups

  8. 4.4 Assessment of Debris Generated by Explosions and Intentional Breakups, cont.

  9. 4.5 Assessment of Debris Generated by On-orbit Collisions

  10. 4.6 Postmission Disposal of Space Structures

  11. 4.6 Postmission Disposal of Space Structures, cont.

  12. 4.7 Survival of Debris From the Postmission Disposal Earth Atmospheric Reentry Option

  13. 4.8 Additional Assessment Requirements for Tether Missions

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