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  • 1
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    The Shuttle induced background - Gaseous constituents (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The gaseous environment around the Shuttle was evaluated by several instruments flown on many Shuttle flights. The major contaminant turned out to be water vapor. The rear thrusters are a major transitory source of water, N2 and/or CO, and possibly NO. Since effluent fluxes are scattered from the atmosphere into instrument faces, the angle of attack is an important variable in the flux levels.
    Keywords: SPACE TRANSPORTATION
    Type: Advances in Space Research (ISSN 0273-1177); 7; 5, 19
    Format: text
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  • 2
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    Mass spectrometer (1983)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: The quadrupole Mass Spectrometer of the Induced Environment Contamination Monitor (IECM) operates in the range from 2 to 150 amu. It is pointed out that the Mass Spectrometer on STS-2 performed very well. It was found that the column density of H2O effluent from the Shuttle reached a maximum of 1 x 10 to the 13th per sq cm at 7 hr, 30 min and decreased by a factor of 7.5 during the subsequent 40 hrs. The count rate response of H2O could be correlated with mission-related events, taking into account the dumping of supply water, the operation of the Flash Evaporator System, and the firing of a primary reaction control system engine.
    Keywords: SPACE TRANSPORTATION
    Format: text
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  • 3
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    STS-1 mission contamination evaluation approach (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The space transportation system 1 mission will be the first opportunity to assess the induced environment of the orbiter payload bay region. Two tools were developed to aid in this assessment. The shuttle payload contamination evaluation computer program was developed to provide an analytical tool for prediction of the induced molecular contamination environment of the space shuttle orbiter during its onorbit operations. An induced environment contamination monitor was constructed and tested to measure the space shuttle orbiter contamination environment inside the payload bay during ascent and descent and inside and outside the payload bay during the onorbit phase. Measurements are to be performed during the four orbital flight test series. Measurements planned for the first flight are described and predicted environmental data are discussed. The results indicate that the expected data are within the measurement range of the induced environment contamination monitor instruments evaluated, and therefore it is expected that useful contamination environmental data will be available after the first flight.
    Keywords: SPACE TRANSPORTATION
    Type: The 11th Space Simulation Conf.; p 201-215
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Induced environment contamination monitor ascent/entry, optical and deposition measurements (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The induced environment contamination monitor is described. Optical and deposition measurements for ascent and descent are presented.
    Keywords: SPACE TRANSPORTATION
    Type: Systematics General Corp. The Shuttle Environ. Workshop; 15 p
    Format: application/pdf
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  • 5
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    Introductory comments (1983)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Vibroacoustic and thermal environment data gathered from the first three flights of the space shuttle are presented. The characterization of the particulate, gaseous, and electromagnetic emissions associated with the shuttle flight is emphasized. Measurements of vehicle glow light emissions and material effects (mass loss) due to the low Earth environment interactions with the shuttle vehicle are presented.
    Keywords: SPACE TRANSPORTATION
    Type: Systematics General Corp. The Shuttle Environ. Workshop; 6 p
    Format: application/pdf
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  • 6
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    Passive Optical Sample Assembly (POSA) for STS-1 quick look post-mission report (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A passively deployed array of contamination-sensitive samples was mounted and flown in the cargo bay of the space shuttle Columbia during the first orbital flight test. A similar unit was mounted in a different location in the cargo bay at Dryden Flight Research Center during the postflight operations there prior to the ferry flight return of Columbia to Kennedy Space Center. The samples in both POSA arrays were subjected to a series of optical and analytical measurements prior to delivery for installation in the cargo bay and after retrieval of the flight hardware. A quick-look summary of the results of a comparison of the series of measurements is presented.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-TM-82421
    Format: application/pdf
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  • 7
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    STS-2, -3, -4 Induced Environment Contamination Monitor (ICEM) (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The second, third, and fourth space transportation system missions are described including the location of the IECM in the payload bay and the shuttle coordinate systems used. Measurement results from the three flights are given for each instrument with comparisons to original goals for preflight environment and induced environment contamination. These results include very low levels of molecular mass accumulation rates, absence of molecular films on optical samples, outgassing species above 50 amu undetectable generally low levels of on-orbit particulates, and decay rates for early mission water dump particulates. Results of exposure of several optical materials and coatings to atomic oxygen are also presented. From these results, it is concluded that the space shuttle met the established induced environment contamination goals.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-TM-82524 , NAS 1.15:82524
    Format: application/pdf
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  • 8
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    An Induced Environment Contamination Monitor for the Space Shuttle (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The Induced Environment Contamination Monitor (IECM), a set of ten instruments integrated into a self-contained unit and scheduled to fly on shuttle Orbital Flight Tests 1 through 6 and on Spacelabs 1 and 2, is described. The IECM is designed to measure the actual environment to determine whether the strict controls placed on the shuttle system have solved the contamination problem. Measurements are taken during prelaunch, ascent, on-orbit, descent, and postlanding. The on-orbit measurements are molecular return flux, background spectral intensity, molecular deposition, and optical surface effects. During the other mission phases dew point, humidity, aerosol content, and trace gas are measured as well as optical surface effects and molecular deposition. The IECM systems and thermal design are discussed. Preflight and ground operations are presented together with associated ground support equipment. Flight operations and data reduction plans are given.
    Keywords: SPACE TRANSPORTATION
    Type: NASA-TM-78193
    Format: application/pdf
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  • 9
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    Shuttle optical environment; Proceedings of the Meeting, Washington, DC, April 23, 24, 1981 (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The numerical modeling, instrumentation, identification, and procedures to characterize and/or control contamination hazards to equipment used on the Shuttle are discussed. On-orbit pollutants include molecular offgassing and outgassing, particulate material, and substances from thrusters, vents, and leaks. Clean-rooms are being implemented in ground assembly and integration facilities. Attention is given to an upgraded SPACE program for numerically modeling contamination pathways and appropriate procedures to protect instrumentation from film and particulate deposition. Finally, attention is given to military cryogenic IR detectors being employed to quantify the Shuttle thermal and solid pollutant environment on-orbit as a prelude to future operational IR sensors.
    Keywords: SPACE TRANSPORTATION
    Type: Shuttle optical environment; Apr 23, 1981 - Apr 24, 1981; Washington, DC
    Format: text
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