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A Comparison of Results From NASA's Meteoroid Engineering Model to the LDEF Cratering RecordNASA's Long Duration Exposure Facility (LDEF) has provided an extensive record of the meteoroid environment in Low Earth Orbit. LDEF's combination of fixed orientation, large collecting area, and long lifetime imposes constraints on the absolute flux of potentially hazardous meteoroids. The relative impact rate on each of LDEF's fourteen surfaces arises from the underlying velocity distribution and directionality of the meteoroid environment. For the first time, we model the meteoroid environment encountered by LDEF over its operational lifetime using NASA's Meteoroid Engineering Model Release 2 (MEMR2) and compare the model results with the observed craters of potentially hazardous meteoroids (i.e. crater diameters larger than approximately 0.6 mm). We discuss the extent to which the observations and model agree and how the impact rates across all of the LDEF surfaces may suggest improvements to the underlying assumptions that go into future versions of MEM.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Ehlert, S.
(Qualis Corp. Huntsville, AL, United States)
Moorhead, A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Cooke, W. J.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
May 8, 2017
Publication Date
April 18, 2017
Subject Category
Lunar And Planetary Science And Exploration
Report/Patent Number
Meeting Information
Meeting: European Conference on Space Debris
Location: Darmstadt
Country: Germany
Start Date: April 18, 2017
End Date: April 21, 2017
Sponsors: European Space Agency
Funding Number(s)
Distribution Limits
Public Use Permitted.
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