ASTM E349-00

Standard Terminology Relating to Space Simulation

General Information

• Status: Historical
• Publication Date: 09-Oct-2000
• ICS: 01.040.49 - Aircraft and space vehicle engineering (Vocabularies)
• ICS: 49.140 - Space systems and operations
• Technical Committee: E21 - Space Simulation and Applications of Space Technology

Relations

• Replaced By: ASTM E349-06 - Standard Terminology Relating to Space Simulation
• Effective Date: 01-Apr-2006
• Referred By: ASTM E772-15(2021) - Standard Terminology of Solar Energy Conversion
• Effective Date: 10-Oct-2000
• Referred By: ASTM E491-73(2020) - Standard Practice for Solar Simulation for Thermal Balance Testing of Spacecraft
• Effective Date: 10-Oct-2000
• Referred By: ASTM E284-22 - Standard Terminology of Appearance
• Effective Date: 10-Oct-2000
• Referred By: ASTM E423-71(2019) - Standard Test Method for Normal Spectral Emittance at Elevated Temperatures of Nonconducting Specimens
• Effective Date: 10-Oct-2000
• Referred By: ASTM C1483/C1483M-17(2022) - Standard Specification for Exterior Solar Radiation Control Coatings on Buildings
• Effective Date: 10-Oct-2000
• Referred By: ASTM E307-72(2019) - Standard Test Method for Normal Spectral Emittance at Elevated Temperatures
• Effective Date: 10-Oct-2000
• Referred By: ASTM E434-10(2020) - Standard Test Method for Calorimetric Determination of Hemispherical Emittance and the Ratio of Solar Absorptance to Hemispherical Emittance Using Solar Simulation
• Effective Date: 10-Oct-2000
• Referred By: ASTM E512-94(2020) - Standard Practice for Combined, Simulated Space Environment Testing of Thermal Control Materials with Electromagnetic and Particulate Radiation
• Effective Date: 10-Oct-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E349–00
Standard Terminology Relating to
1
Space Simulation
This standard is issued under the fixed designation E349; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
These definitions pertain to technologies related to space environment simulation. Where possible,
existing international and national standard definitions have been used.
ELECTROMAGNETIC RADIATION TERMS
netic radiations (photons) of wavelengths lying between the region of
FUNDAMENTAL CONCEPTS
transition to X-rays (1 nm) and the region of transition to radio waves (1
absorption, n—transformation of radiant energy to a different
mm).
form of energy by interaction with matter.
reflection, n—return of radiation by a surface without change
complex radiation, n—radiation composed of a number of
offrequencyofthemonochromaticcomponentsofwhichthe
monochromatic radiations.
radiation is composed.
diffusion, n—change of the spatial distribution of a beam of
refraction, n—change in the direction of propagation of
radiation when it is deviated in many directions by a surface
radiation determined by change in the velocity of propaga-
or a medium.
tion in passing from one medium to another.
emission, n— release of radiant energy.
spectrum of radiation, n—(1) spatial display of a complex
infrared radiation,n—radiationforwhichthewavelengthsof
radiation produced by separation of its monochromatic
the monochromatic components are greater than those for
components.
vissible radiation, and less than about 1 mm.
(2) composition of a complex radiation.
NOTE 1—The limits of the spectral range of infrared radiation are not
transmission, n—passage of radiation through a medium
welldefinedandmayvaryaccordingtotheuser.CommitteeE-2.1.2ofthe
without change of frequency of the monochromatic compo-
CIE distinguishes in the spectral range between 780 nm and 1 mm:
nents of which the radiation is composed.
IR-A 780 to 1400 nm
ultraviolet radiation, n—radiation for which the wavelengths
IR-B 1.4to3µm
ofthemonochromaticcomponentsaresmallerthanthosefor
IR-C 3µmto1mm
visible radiation and more than about 1 nm.
irradiation, n—application of radiation to an object.
monochromatic radiation, n—radiation characterized by a NOTE 3—Thelimitsofthespectralrangeofultravioletradiationarenot
welldefinedandmayvaryaccordingtotheuser.CommitteeE-2.1.2ofthe
single frequency. By extension, radiation of a very small
CIE distinguishes in the spectral range between 100 and 400 nm:
range of frequency or wavelength that can be described by
UV-A 315 to 400 nm
stating a single frequency or wavelength.
UV-B 280 to 315 nm
radiation, n—(1) emission or transfer of energy in the form of
UV-C 100 to 280 nm
electromagnetic waves or particles.
visible radiation,n—anyradiationcapableofcausingavisual
(2) the electromagnetic waves or particles.
sensation.
NOTE 2—In general, nuclear radiations and radio waves are not
NOTE 4—The limits of the spectral range of visible radiation are not
considered in this vocabulary, only optical radiations, that is, electromag-
well defined and may vary according to the user. The lower limit is
generally taken between 380 and 400 nm and the upper limit between 760
−9
and 790 nm (1 nanometer, nm=10 m).
1
These definitions are under the jurisdiction ofASTM Committee E21 on Space
QUANTITIES
Simulation and Applications of Space Technology and are the direct responsibility
of Subcommittee E21.02 on Terminology, Units, and Editorial.
absorptance,n—ratiooftheabsorbedradiantorluminousflux
Current edition approved October, 10 2000. Published December 2000. Origi-
nally published as E349–68T. Last previous edition E349–72 (1999). to the incident flux. Symbol: a , a , a.
e v
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E349–00
NOTE 5—In general, the value of the absorptance depends upon the NOTE 11—In German, the symbol E is still in use and the natural
mode of irradiation, the spectral composition, and the state of polarization logarithm is also used sometimes instead of the common logarithm; the
of the incident radiation. corresponding quantity is then called “natürliches Absorptionsmass.”
(=In 1/ti).
absorptivity of an absorbing material, n—internal absorp-
internal transmittance of a homogeneous nondiffusing
tance of a layer of the material such that the path of the
plate, n—ratio of the radiant or luminous flux reaching the
radiation is of unit length.
exit surface of the plate to the flux which leaves the entry
diffuse reflection, n—diffusion
...