Version:2.4.1
NumericalData
ResourceID
spase://CNES/NumericalData/CDPP-AMDA/ULYSSES/SWOOPS/ulys-bai-mom
ResourceHeader
ResourceName
Ulysses - SWOOPS - sw ions
ReleaseDate
2012-03-06 22:18:14Z
Description
The proton temperature has been estimated in two different ways, one of which will sometimes lead to an overestimate of the temperature and one of which will sometimes lead to an underestimate. T-large is the integral of the distribution in three-dimensional velocity space over all energy channels and angle bins that are statistically above noise. The criterion for noise determination is based upon the estimation of the total contribution from a shell that is spherically symmetric in velocity space. T-large has the drawback that at times when the solar wind is cold the angular responses of the instrument channels are as wide or wider than the beam, and the temperature is overestimated. T-small is estimated by summing over angle the observations at a fixed energy. The moments of the resulting one dimensional plasma spectrum are then summed and the resulting RR (radial) component of the temperature tensor is used as the estimate of proton temperature. Additionally, to avoid contamination from alpha particles, no channels further in velocity space from the proton peak than the minimum in flux between the proton and alpha particles peaks are used in the T-small estimate. T-large and T-small will generally bracket the true temperature. However, for very cold plasma, T-small may not be a true minimum.
Contacts
InformationURL
Name
Readme file at SPDF
URL
InformationURL
Name
SWOOPS data users' guide
URL
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
CDPP/AMDA HAPI Server
URL
Style
HAPI
ProductKey
ulys-bai-mom
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 https://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 https://amda.cdpp.eu/help/policy.html . Please acknowledge the Data Providers.
ProviderName
CDAWeb
ProviderResourceName
UY_M0_BAI
InstrumentIDs
MeasurementType
ThermalPlasma
TemporalDescription
TimeSpan
StartDate
1990-11-18 00:33:48Z
StopDate
2009-06-30 15:54:12Z
CadenceMin
PT4M
CadenceMax
PT8M
ObservedRegion
Heliosphere
Parameter #1
Name
density h+
ParameterKey
n_p_ulys
Description
Solar wind proton plasma density
UCD
phys.density;phys.atmol.ionStage
Units
cm-3
RenderingHints
Particle
ParticleType
Proton
ParticleQuantity
NumberDensity
Parameter #2
Name
density he++
ParameterKey
n_a_ulys
Description
Solar wind alpha particle plasma density
UCD
phys.density;phys.atmol.ionStage
Units
cm-3
RenderingHints
Particle
ParticleType
AlphaParticle
Qualifier
Average
ParticleQuantity
NumberDensity
Parameter #3
Name
v_rtn
ParameterKey
v_ulys_rtn
Description
Hourly averaged solar wind plasma flow speed
UCD
phys.veloc;phys.atmol.ionStage
Units
km/s
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
RTN
RenderingHints
Structure
Size
3
Element
Name
vr
Index
1
ParameterKey
v_ulys_rtn(0)
Element
Name
vt
Index
2
ParameterKey
v_ulys_rtn(1)
Element
Name
vn
Index
3
ParameterKey
v_ulys_rtn(2)
Particle
ParticleType
Proton
Qualifier
Average
ParticleQuantity
FlowSpeed
Parameter #4
Name
temperature h+
ParameterKey
tp_ulys
Description
solar wind plasma temperature
UCD
phys.temperature;phys.atmol.ionStage
Units
eV
RenderingHints
Structure
Size
2
Element
Name
t_large
Index
1
ParameterKey
tp_ulys(0)
Element
Name
t_small
Index
2
ParameterKey
tp_ulys(1)
Particle
ParticleType
Proton
ParticleQuantity
Temperature