International Space Station (ISS) Environmental Control and Life Support System (ECLSS) Vent Flow Reflection and Detection by Robotic External Leak Locator (RELL)

Huang, Alvin Y.; Deal, Alexandra M.; Fox, Katie L.; Heiser, Michael J.; Hartman, William A.; Mikatarian, Ronald R.; Davis, Matthew J.; Naids, Adam; Bond, Timothy A.; Johnson, Brien; Rossetti, Dino J.

On-orbit Robotic External Leak Locator (RELL) (i.e., mass spectrometer and ion gauge) measurements on the International Space Station (ISS) are presented to show the detection of recurring Environmental Control and Life Support System (ECLSS) vents at multiple ISS locations and RELL pointing directions. The path of ECLSS effluents to the RELL detectors is not entirely obvious at some locations, but the data indicates that diffuse gas-surface reflection or scattering resulting from plume interaction with vehicle surfaces is responsible. RELL was also able to confirm the ISS ECLSS constituents and distinguish them from the ammonia leak based on the ion mass spectra and known venting times during its operation to locate a leak in the ISS port-side External Active Thermal Control System (EATCS) coolant loop.

Document ID

20180007588

Acquisition Source

Johnson Space Center

Document Type

Presentation

Authors

Date Acquired

November 7, 2018

Publication Date

August 20, 2018

Subject Category

Report/Patent Number

Meeting Information

Meeting: SPIE Optical Engineering + Applications

Location: San Diego, CA

Country: United States

Start Date: August 19, 2018

End Date: August 23, 2018

Sponsors: International Society for Optical Engineering

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Distribution Limits

Public

Public Use Permitted.

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