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Current Status on Radiation Modeling for the Hayabusa Re-entryOn June 13, 2010 the Japanese Hayabusa capsule performed its reentry into the Earths atmosphere over Australia after a seven year journey to the asteroid Itokawa. The reentry was studied by numerous imaging and spectroscopic instruments onboard NASA's DC-8 Airborne Laboratory and from three sites on the ground, in order to measure surface and plasma radiation generated by the Hayabusa Sample Return Capsule (SRC). Post flight, the flow solutions were recomputed to include the whole flow field around the capsule at 11 points along the reentry trajectory using updated trajectory information. Again, material response was taken into account to obtain most reliable surface temperature information. These data will be used to compute thermal radiation of the glowing heat shield and plasma radiation by the shock/post-shock layer system to support analysis of the experimental observation data. For this purpose, lines of sight data are being extracted from the flow field volume grids and plasma radiation will be computed using NEQAIR [4] which is a line-by-line spectroscopic code with one-dimensional transport of radiation intensity. The procedures being used were already successfully applied to the analysis of the observation of the Stardust reentry [5].
Document ID
20110014307
Acquisition Source
Ames Research Center
Document Type
Presentation
Authors
Winter, Michael W. (California Univ. Santa Cruz, CA, United States)
McDaniel, Ryan D. (NASA Ames Research Center Moffett Field, CA, United States)
Chen, Yih-Kang (NASA Ames Research Center Moffett Field, CA, United States)
Liu, Yen (NASA Ames Research Center Moffett Field, CA, United States)
Saunders, David (ERC, Inc. Mountain View, CA, US)
Date Acquired
August 25, 2013
Publication Date
March 21, 2011
Subject Category
Space Radiation
Report/Patent Number
ARC-E-DAA-TN3212
Meeting Information
Meeting: Workshop on Re-Entry Emission Signatures V
Location: Brisbane
Country: Australia
Start Date: March 21, 2011
End Date: March 22, 2011
Sponsors: Queensland Univ.
Funding Number(s)
CONTRACT_GRANT: NNA10DE12C
CONTRACT_GRANT: NAS2-03144
Distribution Limits
Public
Copyright
Public Use Permitted.

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