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ACE Solar Isotope Spectrometer (SIS) 1-Hour Level 2 Key Parameter Data

ResourceID
spase://NASA/NumericalData/ACE/SIS/L2/KP/PT1H

Description

ACE Solar Isotope Spectrometer (SIS) hourly intensities and count rates, for each of 14 elements (He,C,N,O,Ne,Na,Mg,Al,Si,S,Ar,Ca,Fe,Ni).in each of 8 energy bins. Overall energy ranges covered go from 3.4-41 MeV/n for helium to 10.5-168 MeV/n for iron. These are calibrated science quality data. The data are accessible via ftp in HDF and CDF from the ACE Science Center and CDAWeb, respectively, and in ASCII format from the value-added interfaces at those sites. The "parameter keys" given below are as used by CDAWeb.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/ACE/SIS/L2/KP/PT1H
ResourceHeader
ResourceName
ACE Solar Isotope Spectrometer (SIS) 1-Hour Level 2 Key Parameter Data
ReleaseDate
2020-07-07 21:14:15Z
Description

ACE Solar Isotope Spectrometer (SIS) hourly intensities and count rates, for each of 14 elements (He,C,N,O,Ne,Na,Mg,Al,Si,S,Ar,Ca,Fe,Ni).in each of 8 energy bins. Overall energy ranges covered go from 3.4-41 MeV/n for helium to 10.5-168 MeV/n for iron. These are calibrated science quality data. The data are accessible via ftp in HDF and CDF from the ACE Science Center and CDAWeb, respectively, and in ASCII format from the value-added interfaces at those sites. The "parameter keys" given below are as used by CDAWeb.

Acknowledgement
Please acknowledge the ACE/SIS instrument team and the ACE Science Center
Contacts
RolePerson
1.TechnicalContactspase://SMWG/Person/C.M.S.Cohen
2.CoInvestigatorspase://SMWG/Person/Richard.A.Mewaldt
InformationURL
Name
ACE Solar Isotope Spectrometer (SIS) Level 2 data Home Page
URL
http://www.srl.caltech.edu/ACE/ASC/level2/sis_l2desc.html
Description

A web site hosting instrument information, data release notes, as well as web utilities for plotting and downloading data

InformationURL
Name
Rules of use, and caveats
URL
http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html
Description

ACE level 2 data rules of use, and caveats

PriorIDs
spase://VHO/NumericalData/ACE/SIS/L2_KP_PT1H
spase://VSPO/NumericalData/ACE/SIS/PT3600S
>spase://VSPO/NumericalData/P_ACE_HDR_SIS_3600S
spase://VSPO/NumericalData/ACE/SIS/L2/KP/PT1H
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ace/sis/level_2_cdaweb/sis_k0/
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/sis/level_2_cdaweb/sis_k0/
Description

In CDF via HTTP from CDAWeb

AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_K0_SIS&index=sp_phys
ProductKey
AC_K0_SIS
Description

For plots, numeric lists, and user specified files

Format
CDF
Acknowledgement
Please acknowledge the ACE/SIS instrument team, the ACE Science Center, and the CDAWeb team at GSFC/SPDF
AccessInformation
RepositoryID
spase://SMWG/Repository/ACE_SC
Availability
Online
AccessRights
Open
AccessURL
Name
ASC
URL
http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_SIS.html
Description

Plots and lists of user-selected parameters

Format
Text
Acknowledgement
Please acknowledge the ACE/SIS instrument team and the ACE Science Center
AccessInformation
RepositoryID
spase://SMWG/Repository/ACE_SC
Availability
Online
AccessRights
Open
AccessURL
Name
FTP area at ASC
URL
ftp://mussel.srl.caltech.edu/pub/ace/level2/sis/
Description

In HDF via ftp from the ACE Science center

Format
HDF
Acknowledgement
Please acknowledge the ACE/SIS instrument team and the ACE Science Center
ProviderResourceName
ACE SIS Level 2 Key Parameter Data, 1-hour averages
ProviderProcessingLevel
Level 2
ProviderVersion
3
InstrumentIDs
spase://SMWG/Instrument/ACE/SIS
MeasurementType
EnergeticParticles
TemporalDescription
TimeSpan
StartDate
1997-08-29 00:00:00Z
RelativeStopDate
-P2M
Cadence
PT1H
ObservedRegion
Heliosphere.NearEarth
Caveats
The quality of ACE level 2 data is such that it is suitable for serious scientific study. However, to avoid confusion and misunderstanding, it is recommended that users consult with the appropriate ACE team members before publishing work derived from the data. The ACE team has worked hard to ensure that the level 2 data are free from errors, but the team cannot accept responsibility for erroneous data, or for misunderstandings about how the data may be used. This is especially true if the appropriate ACE team members are not consulted before publication. At the very least, preprints should be forwarded to the ACE team before publication.
Parameter #1
Name
Time
ParameterKey
Epoch
Description

Number of milliseconds since CDF_EPOCH: 0000-01-01T00:00:00.000. Timestamp marks beginning of interval

Cadence
PT1H
Units
ms
UnitsConversion
1.0e-3 > s
ValidMin
28-Aug-1997 00:00:00.000
ValidMax
01-Jan-2024 00:00:00.000
FillValue
-1.0E31
Support
SupportQuantity
Temporal
Parameter #2
Name
Time PB5
ParameterKey
Time_PB5
Description

Time of observation in year, day of year, and milliseconds. Timestamp marks beginning of interval

Cadence
PT1H
Structure
Size
3
Element
Name
Year
Index
1
ValidMin
1997
ValidMax
2020
FillValue
-2147483648
Element
Name
Day of year
Index
2
ValidMin
1
ValidMax
366
FillValue
-2147483648
Element
Name
Milliseconds of day
Index
3
ValidMin
0
ValidMax
86401000
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #3
Name
H Particle Flux (>10 MeV)
ParameterKey
H_lo
Description

H Particle Flux (>10 MeV)

Caveats
Proton Flux E>10 MeV - During solar quiet times, these fluxes are contaminated by background from particles entering from the sides of the instrument.
Units
1/(cm2 s ster MeV)
ValidMin
0
ValidMax
10000
FillValue
-1e31
Particle
ParticleType
Proton
ParticleQuantity
NumberFlux
Parameter #4
Name
H Particle Flux (>30 MeV)
ParameterKey
H_hi
Description

H Particle Flux (>30 MeV)

Caveats
Proton Flux E>30 MeV - During solar quiet times, these fluxes are contaminated by background from particles entering from the sides of the instrument.
Units
1/(cm2 s ster MeV)
ValidMin
0
ValidMax
10000
FillValue
-1e31
Particle
ParticleType
Proton
ParticleQuantity
NumberFlux
Parameter #5
Name
C, N, O Particle Flux (7-10 MeV/n)
ParameterKey
CNO_lo
Description

C, N, O Particle Flux (7-10 MeV/n)

Caveats
Note that the energy intervals for the most abundant elements C, N, and O all differ somewhat from the nominal values of 7 to 10 MeV/nuc.
Units
1/(cm2 s ster MeV/n)
ValidMin
0
ValidMax
10000
FillValue
-1e31
Particle
ParticleType
Ion
ParticleQuantity
NumberFlux
Parameter #6
Name
C, N, O Particle Flux (10-15 MeV/n)
ParameterKey
CNO_hi
Description

C, N, O Particle Flux (10-15 MeV/n)

Caveats
Note that the energy intervals for the most abundant elements C, N, and O all differ somewhat from the nominal values of 10 to 15 MeV/nuc.
Units
1/(cm2 s ster MeV/n)
ValidMin
0
ValidMax
10000
FillValue
-1e31
Particle
ParticleType
Ion
ParticleQuantity
NumberFlux
Parameter #7
Name
Z>10 Particle Flux (9-21 MeV/n)
ParameterKey
Z_ge_10
Description

Z>=10 (9-21 MeV/n)

Caveats
Note that the quoted energy interval of ~9 to 21 MeV/nuc is strictly valid only for Si. For Ne the corresponding interval is ~8 to ~17 MeV/nuc, while for Fe it is ~12 to ~26 MeV/nuc.
Units
1/(cm2 s ster MeV/n)
ValidMin
0
ValidMax
10000
FillValue
-1e31
Particle
ParticleType
Ion
ParticleQuantity
NumberFlux