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ACE Magnetic Field 16-Second Level 2 Data

ResourceID
spase://NASA/NumericalData/ACE/MAG/L2/PT16S

Description

ACE Magnetometer level 2 data, 16-second averages of field magnitude and GSE and GSM Cartesian components, plus standard deviations, plus ACE location 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. One-sec, 4-min, 1-hr, 1-day and 27-day averages are also available via the access paths given below.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/ACE/MAG/L2/PT16S
ResourceHeader
ResourceName
ACE Magnetic Field 16-Second Level 2 Data
ReleaseDate
2020-07-07 21:14:15Z
Description

ACE Magnetometer level 2 data, 16-second averages of field magnitude and GSE and GSM Cartesian components, plus standard deviations, plus ACE location 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. One-sec, 4-min, 1-hr, 1-day and 27-day averages are also available via the access paths given below.

Acknowledgement
Please acknowledge the ACE/MAG instrument team and the ACE Science Center
Contacts
RolePerson
1.CoInvestigatorspase://SMWG/Person/Norman.F.Ness
2.TechnicalContactspase://SMWG/Person/Charles.W.Smith
InformationURL
Name
ACE Magnetometer (MAG) Level 2 data Home Page
URL
http://www.srl.caltech.edu/ACE/ASC/level2/mag_l2desc.html
Description

ACE Science Center 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/MAG/L2_PT16S
spase://VSPO/NumericalData/ACE/MAG/L2/PT16S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h0/
Description

In CDF via ftp from CDAWeb

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/mag/level_2_cdaweb/mfi_h0/
Description

In CDF via HTTP from SPDF

Format
CDF
Acknowledgement
Please acknowledge the ACE/MAG instrument team, the ACE Science Center, and the CDAWeb team at GSFC/SPDF.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb
URL
https://cdaweb.sci.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=AC_H0_MFI&index=sp_phys
ProductKey
AC_H0_MFI
Description

ACE/MAG L2 16-sec data with subset, plot, list functionalities from CDAWeb

Format
Text
Acknowledgement
Please acknowledge the ACE/MAG 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
ACE Science Center ftp area
URL
ftp://mussel.srl.caltech.edu/pub/ace/level2/mag/
Description

In HDF via ftp from ACE Science Center

Format
HDF
Acknowledgement
Please acknowledge the ACE/MAG instrument team and the ACE Science Center
AccessInformation
RepositoryID
spase://SMWG/Repository/ACE_SC
Availability
Online
AccessRights
Open
AccessURL
Name
ACE Science Center
URL
http://www.srl.caltech.edu/ACE/ASC/level2/lvl2DATA_MAG.html
Description

ACE/MAG L2 16-sec data with subset, plot, list functionalities from the ACE Science Center

Format
Text
Acknowledgement
Please acknowledge the ACE/MAG instrument team and the ACE Science Center
ProviderResourceName
ACE MAG Level 2 Data, 16-second averages
ProviderProcessingLevel
Level 2
ProviderVersion
5
InstrumentIDs
spase://SMWG/Instrument/ACE/MAG
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
1997-09-02 00:00:12Z
RelativeStopDate
-P2M
Cadence
PT16S
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

Units
ms
UnitsConversion
1e-3>s
ValidMin
1996-01-01T00:00:00.000Z
ValidMax
2020-01-01T00:00:00.000Z
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

Structure
Size
3
Element
Name
Year
Index
1
Units
year
ValidMin
1997
ValidMax
2020
FillValue
-2147483648
Element
Name
Day of year
Index
2
Units
day
ValidMin
1
ValidMax
366
FillValue
-2147483648
Element
Name
Elapsed milliseconds of day
Index
3
Units
msec
ValidMin
0
ValidMax
86401000
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #3
Name
Bmagnitude
ParameterKey
Magnitude
Description

Magnetic field magnitude

Units
nT
UnitsConversion
1e-9>T
ValidMin
0.0
ValidMax
500.0
FillValue
-1.0E31
Field
Qualifier
Average
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #4
Name
B GSE
ParameterKey
BGSEc
Description

Magnetic field vector in GSE Cartesian coordinates (16 sec)

Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
Bx GSE
Qualifier
Component.I
Index
1
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Element
Name
By GSE
Qualifier
Component.J
Index
2
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Element
Name
Bz GSE
Qualifier
Component.K
Index
3
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Field
Qualifier
Vector
Qualifier
Component.I
Qualifier
Component.J
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #5
Name
B GSM
ParameterKey
BGSM
Description

Magnetic field vector in GSM coordinates (16 sec)

Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Element
Name
Bx GSM
Qualifier
Component.I
Index
1
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Element
Name
By GSM
Qualifier
Component.J
Index
2
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Element
Name
Bz GSM
Qualifier
Component.K
Index
3
ValidMin
-65534.0
ValidMax
65534.0
FillValue
-1.0E31
Field
Qualifier
Vector
Qualifier
Component.I
Qualifier
Component.J
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #6
Name
B RMS
ParameterKey
dBrms
Description

RMS of magnetic field magnitude (16 sec period)

Units
nT
UnitsConversion
1e-9>T
ValidMin
0.0
ValidMax
10.0
FillValue
-1.0E31
Field
Qualifier
StandardDeviation
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #7
Name
Data Quality Flag
ParameterKey
Q_FLAG
Description

Data Quality Flag: 0 = good; 1 = S/C Maneuver & subsequent high-nutation period (~4 hr) 2 = Bad data/missing data

ValidMin
0
ValidMax
2
FillValue
-2147483648
Support
SupportQuantity
Other
Parameter #8
Name
S/C position in GSE
ParameterKey
SC_pos_GSE
Description

ACE s/c position in GSE coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
X GSE
Qualifier
Component.I
Index
1
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Element
Name
Y GSE
Qualifier
Component.J
Index
2
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Element
Name
Z GSE
Qualifier
Component.K
Index
3
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #9
Name
S/C position in GSM
ParameterKey
SC_pos_GSM
Description

ACE s/c position in GSM coordinates

Caveats
Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Element
Name
X GSM
Qualifier
Component.I
Index
1
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Element
Name
Y GSM
Qualifier
Component.J
Index
2
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Element
Name
Z GSM
Qualifier
Component.K
Index
3
ValidMin
-2000000.0
ValidMax
2000000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional