Version:2.4.1
NumericalData
ResourceID
spase://CNES/NumericalData/CDPP-AMDA/MGS/Proxy/mgs-proxy-subsol
ResourceHeader
ResourceName
subsolar b strength
ReleaseDate
2012-03-06 20:46:17Z
Description
Subsolar field strength is calculated on an orbit-by-obit basis
using MGS mapping data (taken in a circular ~400 km orbit). For each orbit,
we take all measured field strengths when the spacecraft was at solar zenith
angles less than 110o. We then omit observations taken above longitudes and
latitudes associated with moderate or strong crustal magnetic fields. If enough
observations remain, then we fit the remaining data to a cos(SZA) function, and
extrapolate to the field magnitude at SZA=0 deg.
Contacts
InformationURL
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
David Brain
InstrumentIDs
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
1999-04-02 15:45:28Z
StopDate
2006-10-27 14:20:34Z
CadenceMin
PT1H
CadenceMax
PT2H
ObservedRegion
Mars
Caveats
* Upstream pressure can change on any timescale, from seconds to minutes to hours to days. Therefore, determination of the subsolar magnetic field strength may not be reliable over an entire MGS 2-hour orbital period. Please use appropriate caution when using the information on this page.
* In its ~400 km mapping orbit, MGS spends as much as 20 percent of its time above the magnetic pileup region (in the sheath), in a region where magnetic pressure is likely not the dominant pressure term. Therefore, extrapolation to a specific value of upstream dynamic pressure is much less reliable during these times. We recommend that these data be used to distinguish high pressure periods from low pressure periods.
* I use only publicly available MGS data, since those data have been fully calibrated. Therefore, the timeseries will usually be several months "behind" the current date. You can always email me to see whether the page is as up-to-date as possible.
Parameter #1
Name
|b|
ParameterKey
mgs_subsol_bmag
Units
nT
Field