Version:2.4.1
NumericalData
ResourceID
spase://CNES/NumericalData/CDPP-AMDA/ACE/SWEPAM/ace-swp-all
ResourceHeader
ResourceName
sw : prelim
AlternateName
Preliminary, 5-min averages
ReleaseDate
2022-09-25 20:04:26Z
Description
Solar Wind Ion parameters from ACE/SWEPAM. Preliminary, 5-min averages.
Parameters include proton density, temperature (radial component) and flow speed,
flow velocity vector in GSE, GSM and RTN coordinates, and alpha to proton density ratio.
AMDA presents temperature in eV. The ram pressure is calculated using P=rhoNpVp², where rho=1.672622(1+4(1/(1-He++_ratio)-1)).
We use rho=2 here, which corresponds to a ratio of He++ between 4% and 5%.
Acknowledgement
Please acknowledge the ACE/SWEPAM instrument team and the ACE Science Center.
The following would be an appropriate acknowledgement: “We thank the ACE SWEPAM instrument team and the ACE Science Center for providing the ACE data.” We would appreciate preprints/reprints of your papers when they become available.
Contacts
InformationURL
Name
ACE SWEPAM Level 2 data Home Page
URL
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
Description
ACE level 2 data rules of use, and caveats
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDPP/AMDA HAPI Server
URL
Style
HAPI
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse".. See the Rules of the road at http://amda.cdpp.eu/help/policy.html. Please acknowledge the Data Providers.
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDPP/AMDA Web application
URL
Description
Access to Data via CDPP/AMDA Web application.
Format
CSV
Format
VOTable
Format
CDF
Format
PNG
Acknowledgement
Thank you for acknowledging the use of AMDA in publications with wording like "Data analysis was performed with the AMDA science analysis system provided by the Centre de Données de la Physique des Plasmas (CDPP) supported by CNRS, CNES, Observatoire de Paris and Université Paul Sabatier, Toulouse".. See the Rules of the road at http://amda.cdpp.eu/help/policy.html. Please acknowledge the Data Providers.
ProviderName
CDAWeb
ProviderResourceName
ac_k0_swe
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
2001-01-01 00:00:00Z
StopDate
2022-09-17 23:55:00Z
Cadence
PT5M
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
density
ParameterKey
swp_n
Description
Solar Wind Proton Number Density, scalar
UCD
phys.density;phys.atmol.ionStage
Caveats
Np is the proton number density in units of cm-3, as calculated by integrating the ion distribution function.
Units
cm^-3
RenderingHints
ValidMin
0.0
ValidMax
200.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Moment
ParticleQuantity
NumberDensity
Parameter #2
Name
v_bulk
ParameterKey
swp_v
Description
UCD
phys.veloc;phys.atmol.ionStage
Caveats
Vp is the solar wind proton speed, or more generally just the solar wind (bulk) speed. It is obtained by integrating the ion (proton) distribution function.
Units
km/s
RenderingHints
ValidMin
0.0
ValidMax
2500.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Moment
Qualifier
Scalar
ParticleQuantity
Velocity
Parameter #3
Name
t_radial
ParameterKey
swp_t
Description
radial component of the proton temperature
UCD
phys.temperature;phys.atmol.ionStage
Caveats
The radial component of the proton temperature is the (1,1) component of the temperature tensor, along the radial direction. It is obtained by integration of the ion (proton) distribution function.
Units
eV
RenderingHints
ValidMin
1000.0
ValidMax
1100000.0
FillValue
-1.0E31
Particle
ParticleType
Proton
Qualifier
Moment
ParticleQuantity
Temperature
Parameter #4
Name
alpha/proton ratio
ParameterKey
swp_he
Description
alpha to proton density ratio
UCD
phys.density;arith.ratio;phys.atmol.ionStage
Caveats
Alpha ratio (Na/Np) - is the ratio of the number density of helium++ ions to the number density of protons.
RenderingHints
ValidMin
0.0
ValidMax
10.0
FillValue
-1.0E31
Particle
ParticleType
AlphaParticle
ParticleType
Proton
Qualifier
Ratio
ParticleQuantity
NumberDensity
Parameter #5
Name
ram pressure
ParameterKey
swp_pdyn
Description
UCD
phys.pressure;phys.atmol.ionStage
Units
nPa
RenderingHints
Particle
ParticleType
Proton
ParticleQuantity
Pressure