An official website of the United States government
Here's how you know v
Official websites use .gov
A .gov websites belongs to an official government organization in the United States
Secure .gov website use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
ISS Tissue-Equivalent Proportional Counter (TEPC), Dose Analyzer, 10 s Data
var authors='Zapp, Edward N.';
document.write(authors);
(2025).
ISS Tissue-Equivalent Proportional Counter (TEPC), Dose Analyzer, 10 s Data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/0ba1-1764. Accessed on document.write(currentDateStr);.
Note: Proper references, including
Copy BibTeX Citation
or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.
ResourceID
spase://NASA/NumericalData/ISS/TEPC/PT10S
Description
The Position Sensitive-Tissue Equivalent Proportional Chamber, PS-TEPC, is a Radiation Measuring Instrument that measures absorbed Doses and Path Length of Space Radiation Particles simultaneously and determines the Real-Time Liner Energy Transfer, LET, and Equivalent Doses to assess Radiation Risk to Crew Members during Space Flight. Dose Management for Space Radiation Exposure is extremely Important for Crew Members, because the Dose Rates resulting from Radiation Sources including Galactic Cosmic Rays, Solar Particle Events, and Protons trapped in the Earth's Radiation Belts and Secondary Particles such as Neutrons in Low Earth Orbit, LEO, are a few Hundred times greater than those on the Ground. The Detector of the PS-TEPC is a Time Projection Chamber, TPC, made of Biological Tissue-Equivalent Materials where a Micro-Pixel Chamber, m-PIC, is used as a 2-Dimensional Position Sensor, which can acquires 3-Dimensional Tracks and the Energy of each Particle, as well as its Energy, that contributes to Dose Distributions occurring in a Human Body. TEPC Serial Number 1003, TEPC Analysis Software Version Number, 3.1.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
View XML |
Edit
Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/ISS/TEPC/PT10S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
ISS Tissue-Equivalent Proportional Counter (TEPC), Dose Analyzer, 10 s Data
DOI
https://doi.org/10.48322/0ba1-1764
ReleaseDate
2026-06-26 13:18:28Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:02:52Z
Note
Added PublicationInfo. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:29:49Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-12 23:59:20Z
Note
Added DOI. tlk
RevisionEvent
ReleaseDate
2026-06-26 13:18:28Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
Description
The Position Sensitive-Tissue Equivalent Proportional Chamber, PS-TEPC, is a Radiation Measuring Instrument that measures absorbed Doses and Path Length of Space Radiation Particles simultaneously and determines the Real-Time Liner Energy Transfer, LET, and Equivalent Doses to assess Radiation Risk to Crew Members during Space Flight. Dose Management for Space Radiation Exposure is extremely Important for Crew Members, because the Dose Rates resulting from Radiation Sources including Galactic Cosmic Rays, Solar Particle Events, and Protons trapped in the Earth's Radiation Belts and Secondary Particles such as Neutrons in Low Earth Orbit, LEO, are a few Hundred times greater than those on the Ground. The Detector of the PS-TEPC is a Time Projection Chamber, TPC, made of Biological Tissue-Equivalent Materials where a Micro-Pixel Chamber, m-PIC, is used as a 2-Dimensional Position Sensor, which can acquires 3-Dimensional Tracks and the Energy of each Particle, as well as its Energy, that contributes to Dose Distributions occurring in a Human Body. TEPC Serial Number 1003, TEPC Analysis Software Version Number, 3.1.
Acknowledgement
E.N. Zapp, Space Radiation Analysis Group, NASA Johnson Space Center
PublicationInfo
Authors
Zapp, Edward N.
PublicationDate
2025-11-14 16:02:52Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Edward.Neal.Zapp
2.
MetadataContact
spase://SMWG/Person/Robert.E.McGuire
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
ISS PS-TEPC Home Page
URL
https://www.nasa.gov/mission_pages/station/research/experiments/1079.html
Description
Establishment of the Dosimetric Technique in the International Space Station, ISS, with a Position Sensitive-Tissue Equivalent Proportional Chamber, PS-TEPC, 20170802
PriorIDs
spase://VSPO/NumericalData/ISS/TEPC/PT10S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/international_space_station_iss/dos_tepc/
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/international_space_station_iss/dos_tepc/
Description
Access to Data in CDF Format via http from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=ISS_DOSANL_TEPC&index=sp_phys
ProductKey
ISS_DOSANL_TEPC
Description
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/international_space_station_iss/dos_tepc
AccessFilenameTemplate
iss_dosanl_tepc_$Y$m$d$H$M_$v.cdf
Acknowledgement
E.N. Zapp, Space Radiation Analysis Group, NASA Johnson Space Center . Please acknowledge the data providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/ISS_DOSANL_TEPC/clientLibraryExample/
Style
WebService
ProductKey
ISS_DOSANL_TEPC
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
E.N. Zapp, Space Radiation Analysis Group, NASA Johnson Space Center . Please acknowledge the data providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
ISS_DOSANL_TEPC
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
E.N. Zapp, Space Radiation Analysis Group, NASA Johnson Space Center . Please acknowledge the data providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/ISS/TEPC
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
2000-11-09 15:11:03Z
StopDate
2010-04-29 00:49:30Z
Cadence
PT10S
ObservedRegion
Earth.NearSurface.Ionosphere.FRegion
ObservedRegion
Earth.NearSurface.Thermosphere
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Epoch Time, Default
Cadence
PT10S
RenderingHints
DisplayType
TimeSeries
AxisLabel
Epoch
ValidMin
01-Jan-1990 00:00:00.000
ValidMax
31-Dec-2010 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #2
Name
Dose Rate
Set
Time series defined by using: EPOCH
ParameterKey
DOSE
Description
Average Dose Rate
Cadence
PT10S
Units
µGy/min
UnitsConversion
6e-5>Gy/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Avg Dose Rate
ValueFormat
F8.3
ValidMin
0.001
ValidMax
1000.0
FillValue
-1.0e+31
Mixed
MixedQuantity
Other
ParticleType
Ion
ParticleType
Neutron
ParticleType
Proton
Parameter #3
Name
Dose Equivalent Rate, ICRP-60
Set
Time series defined by using: EPOCH
ParameterKey
DOSE_EQ60
Description
Average Dose Equivalent Rate, International Commission on Radiological Protection, Publication 60, ICRP-60
Cadence
PT10S
Units
µSv/min
UnitsConversion
6e-5>Sv/s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Avg Dose Eqv Rate
ValueFormat
F8.3
ValidMin
0.001
ValidMax
100000.0
FillValue
-1.0e+31
Mixed
MixedQuantity
Other
ParticleType
Ion
ParticleType
Neutron
ParticleType
Proton
Parameter #4
Name
Time Interval
Set
Time series defined by using: EPOCH
ParameterKey
TIME_INTERVAL
Description
Tissue Equivalent Proportional Counter, TEPC, Data Collection Duration
Cadence
PT10S
Units
min
UnitsConversion
60$gt;s
RenderingHints
DisplayType
TimeSeries
AxisLabel
Collection Time
ValueFormat
F7.3
ScaleType
LinearScale
ValidMin
0.0
ValidMax
1000.0
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #5
Name
ISS Longitude, GEO
Set
Time series defined by using: EPOCH
ParameterKey
LONGITUDE
Description
International Space Station, ISS, Longitude, Geographic, GEO
Cadence
PT10S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
RenderingHints
DisplayType
TimeSeries
AxisLabel
ISS Geo Long
ValueFormat
F8.3
ScaleType
LinearScale
ValidMin
-180.0
ValidMax
180.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #6
Name
ISS Latitude, GEO
Set
Time series defined by using: EPOCH
ParameterKey
LATITUDE
Description
International Space Station, ISS, Latitude, Geographic, GEO
Cadence
PT10S
Units
°
UnitsConversion
0.0174532925>rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
RenderingHints
DisplayType
TimeSeries
AxisLabel
ISS Geo Lat
ValueFormat
F8.3
ScaleType
LinearScale
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #7
Name
ISS Altitude
Set
Time series defined by using: EPOCH
ParameterKey
ALTITUDE
Description
International Space Station, ISS, Altitude, Geographic, GEO
Cadence
PT10S
Units
km
UnitsConversion
1e3>m
RenderingHints
DisplayType
TimeSeries
AxisLabel
ISS Altitude
ValueFormat
F8.3
ScaleType
LinearScale
ValidMin
0.0
ValidMax
1000.0
FillValue
-1.0e+31
Support
Qualifier
Scalar
SupportQuantity
Positional
Parameter #8
Name
Radiation Type Code
Set
Time series defined by using: EPOCH
ParameterKey
FLAG
Description
Radiation Type Code: denotes the Dominant Radiation Source at a given Time
Cadence
PT10S
RenderingHints
DisplayType
TimeSeries
AxisLabel
Radiation Source
ValueFormat
A12
Support
SupportQuantity
Other
Parameter #9
Name
TEPC Location Code
Set
Time series defined by using: EPOCH
ParameterKey
LOCATION
Description
TEPC Location Code: denotes the Physical Location of the Tissue Equivalent Proportional Counter, TEPC, inside the International Space Station, ISS
Cadence
PT10S
RenderingHints
DisplayType
TimeSeries
AxisLabel
TEPC ISS Loctn
ValueFormat
A50
Support
SupportQuantity
InstrumentMode