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Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
SOHO Charge, Element, and Isotope Analysis System (CELIAS) Solar Extreme-Ultra-Violet Monitor (SEM) Daily Data in CDF Format
var authors='Jones, Andrew; Woodraska, Don';
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(2023).
SOHO Charge, Element, and Isotope Analysis System (CELIAS) Solar Extreme-Ultra-Violet Monitor (SEM) Daily Data in CDF Format.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/d93q-e053. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/SOHO/CELIAS/SEM/CDF/P1D
Description
The data include daily average raw count rates in Channels 1 - 3 and First Order (26 - 34 nm, average of Ch1 and Ch3) and Central Order (0.1 - 50 nm, Ch2) photon fluxes, as well as SOHO Heliocentric location and distance. This CDF dataset was converted from the original ASCII dataset at the SOHO Archive https://soho.nascom.nasa.gov/data/archive.html. The original ASCII dataset Version 4 Science Product Release Notes are available at https://lasp.colorado.edu/eve/data_access/eve_data/lasp_soho_sem_data/long/LASP_SOHO_SEM_release_notes_v4.pdf. Description of the CELIAS-SEM instrument and scientific scope can befound on the CELIAS home page http://www2.physik.uni-kiel.de/SOHO-CELIAS/ and on the SOHO mission home page https://sohowww.nascom.nasa.gov/. CELIAS Instrument Publication: Hovestadt, D., Hilchenbach, M., Bürgi, A. et al. CELIAS - Charge, Element and Isotope Analysis System for SOHO, Sol Phys 162, 441–481 (1995), https://doi.org/10.1007/BF00733436.
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.
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/SOHO/CELIAS/SEM/CDF/P1D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SOHO Charge, Element, and Isotope Analysis System (CELIAS) Solar Extreme-Ultra-Violet Monitor (SEM) Daily Data in CDF Format
DOI
https://doi.org/10.48322/d93q-e053
ReleaseDate
2026-06-26 13:28:01Z
RevisionHistory
RevisionEvent
ReleaseDate
2024-01-22 12:34:56.789Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2024-01-22 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by AK, added and updated URLs, reviewed by AK 20240122
RevisionEvent
ReleaseDate
2025-10-03 10:49:10Z
Note
Updated PublishedBy name to match ROR Registry. 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 13:31:28Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:28:01Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
Description
The data include daily average raw count rates in Channels 1 - 3 and First Order (26 - 34 nm, average of Ch1 and Ch3) and Central Order (0.1 - 50 nm, Ch2) photon fluxes, as well as SOHO Heliocentric location and distance. This CDF dataset was converted from the original ASCII dataset at the SOHO Archive https://soho.nascom.nasa.gov/data/archive.html. The original ASCII dataset Version 4 Science Product Release Notes are available at https://lasp.colorado.edu/eve/data_access/eve_data/lasp_soho_sem_data/long/LASP_SOHO_SEM_release_notes_v4.pdf. Description of the CELIAS-SEM instrument and scientific scope can befound on the CELIAS home page http://www2.physik.uni-kiel.de/SOHO-CELIAS/ and on the SOHO mission home page https://sohowww.nascom.nasa.gov/. CELIAS Instrument Publication: Hovestadt, D., Hilchenbach, M., Bürgi, A. et al. CELIAS - Charge, Element and Isotope Analysis System for SOHO, Sol Phys 162, 441–481 (1995), https://doi.org/10.1007/BF00733436.
Acknowledgement
Please acknowledge the Principal Investigator R. Wimmer-Schweingruber for use of these data.
PublicationInfo
Authors
Jones, Andrew; Woodraska, Don
PublicationDate
2023-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Robert.F.Wimmer-Schweingruber
2.
CoPI
spase://SMWG/Person/Andrew.Jones
3.
CoPI
spase://SMWG/Person/Don.Woodraska
4.
MetadataContact
spase://SMWG/Person/Andriy.Koval
InformationURL
Name
SOHO Mission Home Page
URL
https://sohowww.nascom.nasa.gov/
InformationURL
Name
CELIAS Instrument Home Page
URL
https://www.ieap.uni-kiel.de/et/soho/celias/
InformationURL
Name
CELIAS Instrument DOI
URL
https://doi.org/10.5270/esa-iey8z2h
InformationURL
Name
CELIAS Instrument Publication
URL
https://doi.org/10.1007/BF00733436
Description
Hovestadt, D., Hilchenbach, M., Bürgi, A. et al. CELIAS - Charge, Element and Isotope Analysis System for SOHO. Sol Phys 162, 441–481 (1995)
InformationURL
Name
Version 4 Science Product Release Notes
URL
https://lasp.colorado.edu/eve/data_access/eve_data/lasp_soho_sem_data/long/LASP_SOHO_SEM_release_notes_v4.pdf
InformationURL
Name
The SOHO Archive
URL
https://soho.nascom.nasa.gov/data/archive.html
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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/soho/celias/sem_1day/
Description
Access to Data in CDF Format via ftps from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/soho/celias/sem_1day/
Description
Access to Data in CDF Format via https from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=SOHO_CELIAS-SEM_1DAY&index=sp_phys
ProductKey
SOHO_CELIAS-SEM_1DAY
Description
Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/soho/celias/sem_1day/$Y
AccessFilenameTemplate
soho_celias-sem_1day_$Y$m$d_$v.cdf
Acknowledgement
Please acknowledge the Principal Investigator R. Wimmer-Schweingruber. Please also 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/SOHO_CELIAS-SEM_1DAY/clientLibraryExample/
Style
WebService
ProductKey
SOHO_CELIAS-SEM_1DAY
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
Please acknowledge the Principal Investigator R. Wimmer-Schweingruber. Please also acknowledge the Data Providers and CDAWeb when using these data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
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
SOHO_CELIAS-SEM_1DAY
Description
Web Service to this product using the HAPI interface
Format
CSV
Acknowledgement
Please acknowledge the Principal Investigator R. Wimmer-Schweingruber. Please also acknowledge the Data Providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/SOHO/CELIAS
MeasurementType
Radiance
TemporalDescription
TimeSpan
StartDate
1995-01-01 12:00:00Z
RelativeStopDate
-P1M
Cadence
P1D
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Epoch
ParameterKey
Epoch
Description
Centered Time, number of milliseconds since 01-Jan-0000 00:00:00.000
Caveats
This Parameter exhibits an increasing Monotonic Progression
Units
ms
UnitsConversion
1.0e-3>s
RenderingHints
AxisLabel
Epoch
ValidMin
01-Jan-1995 00:00:00.000
ValidMax
01-Jan-2050 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #2
Name
Chan 1 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH1
Description
Channel 1 daily average (raw) count rate (w/o error bars)
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH1 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #3
Name
Chan 1 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH1_ErrorBars
Description
Channel 1 daily average (raw) count rate (with error bars)
Caveats
This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: CH1.
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH1 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #4
Name
stdev of Chan 1 count rate
Set
Time series defined by using: Epoch
ParameterKey
stdev_CH1
Description
stdev of Channel 1 raw count rate
Cadence
P1D
Units
s^-1
RenderingHints
AxisLabel
stdev of CH1
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
Qualifier
StandardDeviation
SupportQuantity
Other
Parameter #5
Name
Chan 2 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH2
Description
Channel 2 daily average (raw) count rate (w/o error bars)
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH2 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #6
Name
Chan 2 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH2_ErrorBars
Description
Channel 2 daily average (raw) count rate (with error bars)
Caveats
This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: CH2.
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH2 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #7
Name
stdev of Chan 2 count rate
Set
Time series defined by using: Epoch
ParameterKey
stdev_CH2
Description
stdev of Channel 2 raw count rate
Cadence
P1D
Units
s^-1
RenderingHints
AxisLabel
stdev of CH2
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
Qualifier
StandardDeviation
SupportQuantity
Other
Parameter #8
Name
Chan 3 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH3
Description
Channel 3 daily average (raw) count rate (w/o error bars)
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH3 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #9
Name
Chan 3 count rate
Set
Time series defined by using: Epoch
ParameterKey
CH3_ErrorBars
Description
Channel 3 daily average (raw) count rate (with error bars)
Caveats
This parameter is virtual. It is calculated by calling the function ALTERNATE_VIEW with the following input parameters: CH3.
Cadence
P1D
Units
s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
CH3 count rate
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
SupportQuantity
Other
Parameter #10
Name
stdev of Chan 3 count rate
Set
Time series defined by using: Epoch
ParameterKey
stdev_CH3
Description
stdev of Channel 3 raw count rate
Cadence
P1D
Units
s^-1
RenderingHints
AxisLabel
stdev of CH3
ValueFormat
F10.3
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
Qualifier
StandardDeviation
SupportQuantity
Other
Parameter #11
Name
First Order Flux
Set
Time series defined by using: Epoch
ParameterKey
first_order_flux
Description
First Order Flux at 1 AU (26-34 nm, average of CH1 and CH3)
Cadence
P1D
Units
photons cm^-2 s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
First Order Flux
ValueFormat
E11.5E2
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Wave
WaveType
Photon
WaveQuantity
Intensity
WavelengthRange
Low
26
High
34
Units
nm
Parameter #12
Name
Central Order Flux
Set
Time series defined by using: Epoch
ParameterKey
central_order_flux
Description
Central Order Flux at 1 AU (0.1 - 50 nm, CH2)
Cadence
P1D
Units
photons cm^-2 s^-1
RenderingHints
DisplayType
TimeSeries
AxisLabel
Central Order Flux
ValueFormat
E11.5E2
ValidMin
0.0
ValidMax
1.0e+20
FillValue
-1.0e+31
Wave
WaveType
Photon
WaveQuantity
Intensity
WavelengthRange
Low
0.1
High
50
Units
nm
Parameter #13
Name
Heliocentric location
Set
Time series defined by using: Epoch
ParameterKey
HC_POS
Description
SOHO Heliocentric location
Cadence
P1D
Units
km
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SE
RenderingHints
DisplayType
TimeSeries
ValueFormat
E12.5E2
Structure
Size
3
Element
Name
X
Index
1
Element
Name
Y
Index
2
Element
Name
Z
Index
3
ValidMin
-2.0e+08
ValidMax
2.0e+08
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional
Parameter #14
Name
Heliocentric distance (km)
Set
Time series defined by using: Epoch
ParameterKey
HC_R
Description
SOHO heliocentric distance (km)
Cadence
P1D
Units
km
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SE
RenderingHints
DisplayType
TimeSeries
AxisLabel
R
ValueFormat
E12.5E2
ValidMin
0.0
ValidMax
2.0e+08
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Positional
Parameter #15
Name
Heliocentric distance (AU)
Set
Time series defined by using: Epoch
ParameterKey
R_AU
Description
SOHO heliocentric distance (AU)
Cadence
P1D
Units
AU
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SE
RenderingHints
DisplayType
TimeSeries
AxisLabel
R
ValueFormat
F8.6
ValidMin
0.0
ValidMax
2.0
FillValue
-1.0e+31
Support
Qualifier
Magnitude
SupportQuantity
Positional