Data Access
The Fluxgate Magnetometers (FGM) on Magnetospheric Multiscale consist of a traditional Analog Fluxgate Magnetometer (AFG) and a Digital Fluxgate magnetometer (DFG). The dual magnetometers are operated as a single instrument providing a single intercalibrated data product. Range changes occur at different times on the two instruments so the gains checked each periapsis can be carried out unambiguously to apoapsis. Cross correlation of calibration parameters can separate causes of the any apparent calibration changes. Use of Electron Drift Instrument (EDI) to determine the field along the rotation axis allows accurate monitoring of the zero levels along the rotation axis. Prior to launch the magnetometers were calibrated at the Technical University, Braunschweig, except for the AFG magnetometers on MMS3 and MMS4, which were calibrated at UCLA. Both sets of sensors are operated for the entire MMS orbit, with slow survey (8 samples per second) outside of the Region of Interest (ROI), and fast survey (16 samples per second) inside the ROI. Within the ROI, burst mode data (128 samples per second) are also acquired. A detailed description of the MMS fluxgate magnetometers, including science objectives, instrument description, calibration, magnetic cleanliness program, and data flow can be found at http://link.springer.com/article/10.1007%2Fs11214-014-0057-3 (DOI 10.1007/s11214-014-0057-3). Additional information can also be found at http://www-spc.igpp.ucla.edu/ssc/mms (UCLA), and http://www.iwf.oeaw.ac.at/de/forschung/erdnaher-weltraum/mms/dfg (IWF, Graz). For the purpose of creating a unified FGM Level 2 data product, burst mode data is taken from DFG and survey mode data is taken from AFG. Because AFG and DFG are cross-calibrated on an orbit-averaged basis, small differences in offset may be observed between Level 2 burst and survey mode data. Consequently, any differences are within the error of the measurement. Based on preliminary analysis of the data, the absolute error within the Region of Interest (ROI) is estimated to be no more than 0.1 nT in the spin-plane, 0.15 nT along the spin-axis and 0.2 nT in total magnitude.
Version:2.5.0
The Fluxgate Magnetometers (FGM) on Magnetospheric Multiscale consist of a traditional Analog Fluxgate Magnetometer (AFG) and a Digital Fluxgate magnetometer (DFG). The dual magnetometers are operated as a single instrument providing a single intercalibrated data product. Range changes occur at different times on the two instruments so the gains checked each periapsis can be carried out unambiguously to apoapsis. Cross correlation of calibration parameters can separate causes of the any apparent calibration changes. Use of Electron Drift Instrument (EDI) to determine the field along the rotation axis allows accurate monitoring of the zero levels along the rotation axis. Prior to launch the magnetometers were calibrated at the Technical University, Braunschweig, except for the AFG magnetometers on MMS3 and MMS4, which were calibrated at UCLA. Both sets of sensors are operated for the entire MMS orbit, with slow survey (8 samples per second) outside of the Region of Interest (ROI), and fast survey (16 samples per second) inside the ROI. Within the ROI, burst mode data (128 samples per second) are also acquired. A detailed description of the MMS fluxgate magnetometers, including science objectives, instrument description, calibration, magnetic cleanliness program, and data flow can be found at http://link.springer.com/article/10.1007%2Fs11214-014-0057-3 (DOI 10.1007/s11214-014-0057-3). Additional information can also be found at http://www-spc.igpp.ucla.edu/ssc/mms (UCLA), and http://www.iwf.oeaw.ac.at/de/forschung/erdnaher-weltraum/mms/dfg (IWF, Graz). For the purpose of creating a unified FGM Level 2 data product, burst mode data is taken from DFG and survey mode data is taken from AFG. Because AFG and DFG are cross-calibrated on an orbit-averaged basis, small differences in offset may be observed between Level 2 burst and survey mode data. Consequently, any differences are within the error of the measurement. Based on preliminary analysis of the data, the absolute error within the Region of Interest (ROI) is estimated to be no more than 0.1 nT in the spin-plane, 0.15 nT along the spin-axis and 0.2 nT in total magnitude.
| Role | Person | StartDate | StopDate | Note | |
|---|---|---|---|---|---|
| 1. | InstrumentLead CoInvestigator | spase://SMWG/Person/Christopher.T.Russell | |||
| 2. | InstrumentLead CoInvestigator | spase://SMWG/Person/Werner.Magnes | |||
| 3. | Contributor Scientist | spase://SMWG/Person/Hanying.Wei | |||
| 4. | Contributor TechnicalContact | spase://SMWG/Person/Kenneth.R.Bromund | |||
| 5. | Contributor Scientist | spase://SMWG/Person/Ferdinand.Plaschke | |||
| 6. | Contributor InstrumentScientist | spase://SMWG/Person/David.Fischer | |||
| 7. | Contributor Scientist | spase://SMWG/Person/Robert.J.Strangeway | |||
| 8. | InstrumentScientist | spase://SMWG/Person/Hannes.Karl.Leinweber | |||
| 9. | Contributor Scientist | spase://SMWG/Person/Hans.Ulrich.Eichelberger | |||
| 10. | InstrumentScientist | spase://SMWG/Person/B.G.Huang | |||
| 11. | Scientist | spase://SMWG/Person/Guan.Le | |||
| 12. | PrincipalInvestigator | spase://SMWG/Person/James.L.Burch | |||
| 13. | HostContact | spase://SMWG/Person/MMS_SDC_POC | |||
| 14. | MetadataContact | spase://SMWG/Person/Robert.M.Candey | |||
| 15. | MetadataContact | spase://SMWG/Person/Lee.Frost.Bargatze |
The Magnetospheric Multiscale (MMS) Mission Home Page hosted by the Goddard Space Flight Center (GSFC).
The Magnetospheric Multiscale (MMS) Mission home page hosted by the Laboratory of Atmospheric and Space Physics, Science Data Center (LASP, SDC) at the University of Colorado, Boulder.
The Magnetospheric Multiscale (MMS) Flux Gate Magnetometer (FGM) home page hosted by the Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW).
In CDF via ftp from the MMS Science Data Center
In CDF via http from the MMS Science Data Center
In CDF via ftp from SPDF
In CDF via http from SPDF
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Web Service to this product using the HAPI interface
Interval centered time tag (TBC)
Magnetic field vector in Geocentric Solar Ecliptic (GSE) cartesian coordinates plus Btotal (8 or 16 samples/s)
Magnetic field vector in Geocentric Solar Magnetospheric (GSM) cartesian coordinates plus Btotal (8 or 16 samples/s)
Magnetic field vector in Despun MPA-aligned cartesian coordinates plus Btotal (8 or 16 samples/s)
Magnetic field vector in Body Coordinate System cartesian coordinates plus Btotal (8 or 16 samples/s)
Data quality flag: 0=No identified problems, non-zero=blank out the data
Default time
Definitive position in GSE coordinates, 30-s time resolution
Definitive position in GSM coordinates, 30-s time resolution
Magnetic field range setting: 1=High Range, 0=Low Range
Delta from center time to sample start/finish
Sensor temperature smoothed four times with 6-pt boxcar filter (/edge_truncate), linear interpolated to mag times, then smoothed with a 798-pt boxcar
Electronics temperature smoothed four times with 6-pt boxcar filter (/edge_truncate), linear interpolated to mag times, then smoothed with a 798-pt boxcar
Median rate (samples/s) of the current instrument mode. This rate is not necessarily equal to the rate of the L2 data, which may have been downsampled.
One half of the median delta between ephemeris samples