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Cassini Cruise Phase 1-Minute Magnetometer Data

ResourceID
spase://NASA/NumericalData/Cassini/MAG/Cruise.Phase/PT1M

Description

Cassini cruise phase 1-minute-averaged magnetic field data taken during the interval between mid-1999 when near-continuous magnetic field observations were begun and the mid-2004 insertion of Cassini into Saturn orbit. There are no planetary encounter data included. The data are in RTN coordinates. The data are mostly from the fluxgate magnetometer (FGM). The table at https://spdf.gsfc.nasa.gov/pub/data/cassini/vhm.txt identifies the 52 days in 2000-2004 for which the data are solely from the vector helium magnetometer (VHM). Days not in the table contain only FGM data. The data were produced from raw (L1A) data at the PDS/PPI node using software provided by the Cassini MAG team, and employing the latest calibration available. PDS/PPI produced both 1-sec vectors and 1-min averages. The MAG team reports that while range-0 data are well calibrated for both FGM and VHM, higher range data need improvement.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/Cassini/MAG/Cruise.Phase/PT1M
ResourceHeader
ResourceName
Cassini Cruise Phase 1-Minute Magnetometer Data
ReleaseDate
2021-03-10 20:13:28Z
Description

Cassini cruise phase 1-minute-averaged magnetic field data taken during the interval between mid-1999 when near-continuous magnetic field observations were begun and the mid-2004 insertion of Cassini into Saturn orbit. There are no planetary encounter data included. The data are in RTN coordinates. The data are mostly from the fluxgate magnetometer (FGM). The table at https://spdf.gsfc.nasa.gov/pub/data/cassini/vhm.txt identifies the 52 days in 2000-2004 for which the data are solely from the vector helium magnetometer (VHM). Days not in the table contain only FGM data. The data were produced from raw (L1A) data at the PDS/PPI node using software provided by the Cassini MAG team, and employing the latest calibration available. PDS/PPI produced both 1-sec vectors and 1-min averages. The MAG team reports that while range-0 data are well calibrated for both FGM and VHM, higher range data need improvement.

Acknowledgement
Please acknowledge the PI and the National Space Science Data Center for these data
Contacts
RolePersonStartDateStopDateNote
1.TechnicalContactspase://SMWG/Person/Natalia.E.Papitashvili
2.DataProducerspase://SMWG/Person/Raymond.J.Walker
3.PrincipalInvestigatorspase://SMWG/Person/Robert.J.Strangeway
InformationURL
PriorIDs
spase://VHO/NumericalData/Cassini/MAG/Cruise.Phase/PT1M
spase://VSPO/NumericalData/Cassini/MAG/ASCII/PT1M
spase://VSPO/NumericalData/P_CASSINI_MAG_1M
spase://VSPO/NumericalData/Cassini/MAG/PT60S
spase://VSPO/NumericalData/Cassini/MAG/Cruise.Phase/PT1M
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description

In ASCII via ftp from SPDF

AccessURL
Name
HTTPS from SPDF
URL
Description

In ASCII via HTTP from SPDF

Format
Text.ASCII
DataExtent
Quantity
54
Units
MB
Per
P1Y
InstrumentIDs
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2000-01-01 00:00:00Z
StopDate
2004-12-31 23:59:59Z
Cadence
PT1M
ObservedRegion
Heliosphere.NearEarth
Parameter #1
Name
Time
ParameterKey
Column_1
Description

Time YYYY DOY HH MM for averages built from MM:00 to (MM+1):00

Caveats
Two changes were made to the PDS/PPI-provided files. First, PDS time tags of the format YYYY-MM-DDTHH:MM:DD were replaced by FTPBrowser time tags of the format YYYY DDD HH MM. Secondly, minutes with no data had no record in the PDS-provided files but have records, with all fill values except the time tags, in the FTPBrowser version.
Support
SupportQuantity
Temporal
Parameter #2
Name
Br
ParameterKey
Column_2
Description

BR, R component in RTN, nT

Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #3
Name
Bt
ParameterKey
Column_3
Description

BT, T component in RTN, nT

Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #4
Name
Bn
ParameterKey
Column_4
Description

BN, N component in RTN, nT

Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #5
Name
B
ParameterKey
Column_5
Description

B, field magnitude, nT

Units
nT
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #6
Name
Range
ParameterKey
Column_6
Description

Heliocentric radial distance of spacecraft, AU

Units
AU
Support
SupportQuantity
Positional
Parameter #7
Name
Latitude
ParameterKey
Column_7
Description

Heliocentric latitude of spacecraft, deg.

Caveats
IHG is what NSSDC/SPDF typically refers to as HGI
Units
degrees
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
Support
SupportQuantity
Positional
Parameter #8
Name
Longitude
ParameterKey
Column_8
Description

Longitude of spacecraft, East from Sun-Aries line, deg.

Caveats
IHG is what NSSDC/SPDF typically refers to as HGI
Units
degrees
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
Support
SupportQuantity
Positional
Parameter #9
Name
X_IHG
ParameterKey
Column_9
Description

Inertial Heliographic X component of sun-to-spacecraft vector, AU

Caveats
IHG is what NSSDC/SPDF typically refers to as HGI
Units
AU
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
Support
SupportQuantity
Positional
Parameter #10
Name
Y_IHG
ParameterKey
Column_10
Description

Inertial Heliographic Y component of sun-to-spacecraft vector, AU

Caveats
IHG is what NSSDC/SPDF typically refers to as HGI
Units
AU
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
Support
SupportQuantity
Positional
Parameter #11
Name
Z_IHG
ParameterKey
Column_11
Description

Inertial Heliographic Z component of sun-to-spacecraft vector, AU

Caveats
IHG is what NSSDC/SPDF typically refers to as HGI
Units
AU
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HGI
Support
SupportQuantity
Positional
Parameter #12
Name
NPTS
ParameterKey
Column_12
Description

Number of 1-second values in the 1-minute average

Support
SupportQuantity
Other