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SAC-C Mag-F: High Precision Magnetic Scalar Data

ResourceID
spase://NASA/NumericalData/SAC-C/CSC/MAGF/PT1S

Description

This dataset contains 1 second measurements of the scalar magnetic field from from the Compact Spherical Coil (CSC) Fluxgate Vector Magnetometer on the SAC-C spacecraft.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/SAC-C/CSC/MAGF/PT1S
ResourceHeader
ResourceName
SAC-C Mag-F: High Precision Magnetic Scalar Data
AlternateName
Satélite de Aplicaciones Científicas-C Mag-F: Calibrated CSC data
ReleaseDate
2020-07-07 21:15:17Z
Description

This dataset contains 1 second measurements of the scalar magnetic field from from the Compact Spherical Coil (CSC) Fluxgate Vector Magnetometer on the SAC-C spacecraft.

Acknowledgement
Centre National d'Etudes Spatiales (France); National Aeronautics and Space Administration (United States); Danish Space Research Institute (Denmark); National Commission of Space Activities (CONAE) (Argentina); Instituto Nacional de Pesquisas Espaciais, Brazil (Brazil); Agenzia Spaziale Italiana (Italy)
Contacts
RolePersonStartDateStopDateNote
1.ProjectScientistspase://SMWG/Person/UNKNOWN
2.MetadataContactspase://SMWG/Person/James.M.Weygand
InformationURL
Name
The SAC-C Project
URL
https://directory.eoportal.org/web/eoportal/satellite-missions/s/sac-c
Description

Information about the SAC-C Compact Spherical Coil Fluxgate Vector Magnetometer.

Language
en
PriorIDs
spase://VMO/NumericalData/SAC-C/CSC/MAGF/PT1S
spase://VSPO/NumericalData/SAC-C/CSC/MAGF/PT1S
AccessInformation
RepositoryID
spase://SMWG/Repository/SAC-C
Availability
Online
AccessRights
Open
AccessURL
Name
Virtual Magnetospheric Observatory
URL
http://vmo.igpp.ucla.edu/data1/SAC-C/
Description

Compact Spherical Coil Fluxgate Vector Magnetometer MAG-R data.

Format
Text
Acknowledgement
Dr. Jose J Achache; Dr. Ib Laursen
ProcessingLevel
Calibrated
ProviderResourceName
Overhauser Effect Scalar Magnetometer Data
ProviderProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/SAC-C/CSC
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2001-01-23 00:00:00Z
StopDate
2002-05-04 23:59:59Z
Note
It is not clear if this mission is still active.
Cadence
PT1S
ObservedRegion
Earth.NearSurface
ObservedRegion
Earth.NearSurface.AuroralRegion
ObservedRegion
Earth.NearSurface.Ionosphere
ObservedRegion
Earth.NearSurface.PolarCap
Parameter #1
Name
Universal Time
ParameterKey
Time
Description

Universal time columns from left to right are: year-month-day (yyyy-mm-dd) and seconds of the day.

Cadence
PT1S
Structure
Size
2
Description

Universal Time expressed using a 6-column day, month, year, hour, minute, second representation

Element
Name
Year-Month-Day
Index
1
ParameterKey
Column_1-Column_2-Column_3
Element
Name
Second
Index
2
ParameterKey
Second
Support
SupportQuantity
Temporal
Parameter #2
Name
SAC-C Spacecraft Position Vector in ECEF polar coordinates
ParameterKey
Position Vectors
Description

Location of the spacecraft in Earth Centered, Earth Fixed polar coordinates in units of Re and degrees.

Cadence
PT1S
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
ECEF
Structure
Size
3
Element
Name
Radius
Qualifier
Component.I
Index
1
ParameterKey
r
Units
km
Element
Name
Theta
Qualifier
Component.J
Index
2
ParameterKey
theta
Units
degrees
Element
Name
Phi
Qualifier
Component.K
Index
3
ParameterKey
Phi
Units
degrees
Support
SupportQuantity
Positional
Parameter #3
Name
Information and quality flag relating to position.
ParameterKey
Qpos
Description

The bits have the following interpretation (bit 1 is least significant bit - LSB): 0 = poor quality, 1 = Good quality (below 25 m spatial).

Cadence
PT1S
Units
unitless
Support
SupportQuantity
Other
Parameter #4
Name
Magnetic Field Magnitude
ParameterKey
F
Description

SAC-C Mag-F Magnitude data.

Cadence
PT1S
Units
nT
Field
Qualifier
Magnitude
FieldQuantity
Magnetic
Parameter #5
Name
Information and quality flag relating to F (scalar magnetic measurement).
ParameterKey
Qf
Description

Information and quality flag relating to F (scalar magnetic measurement). The bits of this CDF_UINT2 has the following interpretation (bit 1 is least significant bit - LSB):

1.  Frequency calibration: 0 = not applied (poor), 1 = applied (good).
2.  Has occasional time shifts: 0 = yes (poor), 1 = no (good).
3.  Spacecraft disturbance: 0 = ignored, 1 = compensated.
4.  Scalar magnetometer temperature information: 0 = unavailable, 1 = available.
5.  Not currently used = 0.
6.  Not currently used = 0.
7.  Not currently used = 0.
8.  Scalar derived from: 0 = Scalar magnetometer, 1 = Vector magnetometer.
9.  General vector data quality: 0 = poor, 1 = good.
10. Vector magnetometer sample rate: 0 = 25 Hz, 1 = 100 Hz.
11. Vector magnetometer temperature information: 0 = unavailable, 1 = available.
12. Not currently used = 0.
13. Torquer coils: 0 = on, 1 = off.
14. Torquer coils disturbance: 0 = >1nT, 1 = <1nT.
15. Scalar magnetometer power: 0 = on, 1 = off.
16. Not currently used = 0.

If bit 8 is set to 0 (Scalar magnetometer), one can rely on the bits 1-7. If bit 8 is is set to 1 (Vector magnetometer), one can rely on bits 9-16. Further information may be included in this field.
Example: QF = 12928 = 011001010000000b: Scalar derived from Vector magnetometer, scalar magnetometer on, torquer coils off (=>no disturbance), poor attitude, vector magnetometer temperature information unavailable, 100 Hz poor quality CSC data.
Example: To quickly identify Ovh samples (bit 8) do: if QF/28-1 is even then from Ovh.

Cadence
PT1S
Units
unitless
Support
SupportQuantity
Other