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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 991 records · Page 55
All sourcesNASA NTRSDOE OSTI
NASA NTRS2019

Suited Ground Vacuum Chamber Testing Decompression Sickness Tiger Team Report

Suited vacuum chamber testing is critical to flight crew training, sustaining engineering, and development engineering. Most suited vacuum chamber testing at NASA’s Johnson Space Center (JSC) involves crewmembers or human test subjects working at a hypobaric pressure of 4.3 psia, which requires that an oxygen prebreathe be performed prior to decompression to reduce the risk of decompression sickness (DCS). Since 1986, NASA’s policy has been to require a 4-hour resting prebreathe for hypobaric chamber exposures of 4.2 psia lasting greater than 30 minutes. There have been no reports of Type II (i.e., serious, potentially life-threatening) DCS at NASA while using this prebreathe protocol. Several chamber runs, believed to be approximately 5% of all runs, are believed to have been terminated due to Type I DCS symptoms that were performance impairing; however, detailed records of DCS symptoms during suited vacuum chamber runs are not available. The adequacy of the 4-hour prebreathe protocol, as well as the processes by which prebreathe protocols and policies are established, became the subject of significant discussion in April 2018 when medical planning was initiated for chamber runs that were scheduled to occur later in 2018 that would last 8 hours or more with high metabolic rates.

Abercromby, Andrew F. J.↗
NASA NTRS2020

GOES-17 Independent Review Team Investigation Results

The GOES-17 (Geostationary Operational Environmental Satellite) was launched March 1, 2018. It was the second of the GOES R class satellites to be launched - following GOES 16 in November 2016. Both satellites contain Advanced Baseline Imagers (ABIs) that provide high spatial and temporal resolution imagery of the Earth at visible and infrared wavelengths. The Japanese Himawari 8 (launched in October 2014), Himawari 9 (launched in November 2016) and South Korean GEO-KOMPSAT-2A (launched in December 2018) have imager payloads and thermal control systems identical to the GOES R class. All these satellites serve as geostationary weather satellites.

Eugene Ungar↗