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GASMAP Facility Operations (GASMAP)
Principal Investigator
Research Area:
Behavior and performance
Metabolism and nutrition
Technology development
Species Studied
Scientific Name: Homo sapiens Species: Human

The Gas Analyzer System for Metabolic Analysis Physiology (GASMAP) is an instrument that analyzes the inspired and expired breath of subjects and performs metabolic calculations to aid in the health assessment of astronauts in microgravity. GASMAP can be used in conjunction with a bicycle ergometer, treadmill, EKG, blood pressure monitor, and a rebreathing apparatus.

The GASMAP system consisted of: 1) a volumetric flow transducer to quantify the volume of inspired and expired gas, 2) a mass spectrometer with two internal processors, to measure the quantity and identify the species of the inspired and expired respiratory gases, 3) a laptop computer to control mass spectrometer operation, process and communicate data/diagnostics, display real time data, provide limited floppy disk data storage, and perform metabolic calculations, and 4) a calibration assembly to enable mass spectrometer accuracy verification.

The objectives of this study were: 1) Assure the greatest possible analyzer accuracy and response time, 2) Exceed 2.5 year operational life with a goal of 5 years, and 3) Deliver a GASMAP with minimal logistical overhead.

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Respiratory Function Tests
Carbon dioxide (CO2)

Data Information
Data Availability
Archive is complete. Data sets are not publicly available but can be requested.
Data Sets+ Request data

Expired respiratory gas
Inspired respiratory gas

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
NASA 2 03/22/1996 09/26/1996 189 days
NASA 3 09/16/1996 01/22/1997 130 days
NASA 4 01/12/1997 05/24/1997 133 days

Additional Information
Managing NASA Center
Johnson Space Center (JSC)
Responsible NASA Representative
Johnson Space Center LSDA Office
Project Manager: Jessica Keune
Institutional Support
National Aeronautics and Space Administration (NASA)