2.3.2 spase://NASA/NumericalData/MMS/2/FIELDS/FGM/Survey/Level2/PT0.125S MMS 2 Flux Gate Magnetometer (FGM) Combined Fast/Slow Survey DC Magnetic Field, Level 2, Quick-Look Survey 2021-04-27T15:38:11Z 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. J. L. Burch, C. T. Russell, W. Magnus spase://SMWG/Person/James.L.Burch PrincipalInvestigator spase://SMWG/Person/Christopher.T.Russell PrincipalInvestigator spase://SMWG/Person/Werner.Magnes PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire MetadataContact spase://SMWG/Person/Lee.Frost.Bargatze MetadataContact The Magnetospheric Multiscale (MMS) Mission home page at Goddard Space Flight Center (GSFC) https://mms.gsfc.nasa.gov/ The Magnetospheric Multiscale (MMS) Mission Home Page hosted by the Goddard Space Flight Center (GSFC). Data Caveats and Current Release Notes at LASP MMS SDC https://lasp.colorado.edu/mms/sdc/public/datasets/fields/ 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 MMS Graz FGM Team home page at IWF, OAW https://www.oeaw.ac.at/en/iwf/forschung/weltraummissionen/laufende-missionen/mms/dfg The Magnetospheric Multiscale (MMS) Flux Gate Magnetometer (FGM) home page hosted by the Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW). spase://VSPO/NumericalData/MMS/2/FIELDS/FGM/Survey/Level2/PT0.125S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/mms/mms2/fgm/srvy/l2/ In CDF via ftp from SPDF. HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/mms/mms2/fgm/srvy/l2/ In CDF via http from SPDF. CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=MMS2_FGM_SRVY_L2&index=sp_phys MMS2_FGM_SRVY_L2 Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb CDF None J. L. Burch, C. T. Russell, W. Magnus. Please acknowledge the data providers and CDAWeb when using these data. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi MMS2_FGM_SRVY_L2@0 MMS2_FGM_SRVY_L2@1 Web Service to this product using the HAPI interface. CSV J. L. Burch, C. T. Russell, W. Magnus. Please acknowledge the data providers and CDAWeb when using these data. Calibrated spase://SMWG/Instrument/MMS/2/FIELDS/FGM MagneticField 2015-09-01T00:00:00.000 -P2M PT0.125S Earth.Magnetosheath Earth.Magnetosphere Earth.Magnetosphere.Magnetotail Earth.Magnetosphere.Main Earth.Magnetosphere.RadiationBelt Earth.NearSurface.EquatorialRegion Earth.NearSurface.Plasmasphere Heliosphere.NearEarth Epoch Epoch Interval centered time tag (TBC) This parameter exhibits an increasing monotonic progression. PT0.125S ns 1.0e-9>s mms2_fgm_srvy_Epoch LinearScale 2010-01-01T00:00:00.000000000 2030-01-01T00:00:00.999000000 9999-12-31T23:59:59.999999999 Temporal mms2_fgm_b_gse_srvy_l2 Time series defined by using: EPOCH mms2_fgm_b_gse_srvy_l2 Magnetic field vector in Geocentric Solar Ecliptic (GSE) cartesian coordinates plus Btotal (8 or 16 samples/s) PT0.125S nT 1.0e-9>T Cartesian GSE TimeSeries e13.5 LinearScale 4 Bx GSE 1 -17000.0 By GSE 2 -17000.0 Bz GSE 3 -17000.0 Bt 4 0.0 17000.0 -1.0e+31 Vector Magnetic mms2_fgm_b_gsm_srvy_l2 Time series defined by using: EPOCH mms2_fgm_b_gsm_srvy_l2 Magnetic field vector in Geocentric Solar Magnetospheric (GSM) cartesian coordinates plus Btotal (8 or 16 samples/s) PT0.125S nT 1.0e-9>T Cartesian GSM TimeSeries e13.5 LinearScale 4 Bx GSM 1 -17000.0 By GSM 2 -17000.0 Bz GSM 3 -17000.0 Bt 4 0.0 17000.0 -1.0e+31 Vector Magnetic mms2_fgm_b_dmpa_srvy_l2 Time series defined by using: EPOCH mms2_fgm_b_dmpa_srvy_l2 Magnetic field vector in Despun MPA-aligned cartesian coordinates plus Btotal (8 or 16 samples/s) During nominal operations in the region of interest, DMPA is within 3 degrees of GSE. PT0.125S nT 1.0e-9>T Cartesian GSE TimeSeries e13.5 LinearScale 4 Bx DMPA 1 -17000.0 By DMPA 2 -17000.0 Bz DMPA 3 -17000.0 Bt 4 0.0 17000.0 -1.0e+31 Vector Magnetic mms2_fgm_b_bcs_srvy_l2 Time series defined by using: EPOCH mms2_fgm_b_bcs_srvy_l2 Magnetic field vector in Body Coordinate System cartesian coordinates plus Btotal (8 or 16 samples/s) PT0.125S nT 1.0e-9>T Cartesian SC TimeSeries e13.5 LinearScale 4 Bx BCS 1 -17000.0 By BCS 2 -17000.0 Bz BCS 3 -17000.0 Bt 4 0.0 17000.0 -1.0e+31 Vector Magnetic mms2_fgm_flag_srvy_l2 Time series defined by using: EPOCH mms2_fgm_flag_srvy_l2 Data quality flag: 0=No identified problems, non-zero=blank out the data bit definitions: 0: TBD, 1: TBD, 2: user flagged, 3: TBD, 4: B1 saturated, 5: B2 saturated, 6: B3 saturated, 7: range-change glitch, 8-31: TBD PT0.125S mms2_fgm_flag_srvy_l2 z10.8 LinearScale 0 4294967281 4294967295 InstrumentMode Epoch_state Epoch_state Default time This parameter exhibits an increasing monotonic progression. PT0.125S ns 1.0e-9>s Epoch_state LinearScale 1990-01-01T00:00:00.000000000 2030-01-01T00:00:00.999000000 9999-12-31T23:59:59.999999999 Temporal mms2_fgm_r_gse_srvy_l2 Time series defined by using: EPOCH_STATE mms2_fgm_r_gse_srvy_l2 Definitive position in GSE coordinates, 30-s time resolution PT0.125S km 1.0e3>m Cartesian GSE TimeSeries e12.2 LinearScale 4 X GSE 1 Y GSE 2 Z GSE 3 R 4 -1.0e+06 1.0e+06 -1.0e+31 Vector Positional mms2_fgm_r_gsm_srvy_l2 Time series defined by using: EPOCH_STATE mms2_fgm_r_gsm_srvy_l2 Definitive position in GSM coordinates, 30-s time resolution PT0.125S km 1.0e3>m Cartesian GSM TimeSeries e12.2 LinearScale 4 X GSM 1 Y GSM 2 Z GSM 3 R 4 -1.0e+06 1.0e+06 -1.0e+31 Vector Positional mms2_fgm_hirange_srvy_l2 Time series defined by using: EPOCH mms2_fgm_hirange_srvy_l2 Magnetic field range setting: 1=High Range, 0=Low Range PT0.125S mms2_fgm_hirange_srvy_l2 i5 LinearScale 0 2 255 Median Other mms2_fgm_bdeltahalf_srvy_l2 Time series defined by using: EPOCH mms2_fgm_bdeltahalf_srvy_l2 Delta from center time to sample start/finish PT0.125S s 1>s mms2_fgm_bdeltahalf_srvy_l2 e13.5 0.001 1.0 -1.0e+31 Median Temporal mms2_fgm_stemp_srvy_l2 Time series defined by using: EPOCH mms2_fgm_stemp_srvy_l2 Sensor temperature smoothed four times with 6-pt boxcar filter (/edge_truncate), linear interpolated to mag times, then smoothed with a 798-pt boxcar Sensor Temperature smoothed four times with 6-pt boxcar filter (/edge_truncate), linear interpolated to mag times, then smoothed with 798-pt boxcar, t_maxgap=240, t_bmaxgap=240. PT0.125S °C 1>s^-1 mms2_fgm_stemp_srvy_l2 e13.5 LinearScale -1000.0 1000.0 NaN Scalar Other mms2_fgm_etemp_srvy_l2 Time series defined by using: EPOCH mms2_fgm_etemp_srvy_l2 Electronics 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 798-pt boxcar, t_maxgap=240, t_bmaxgap=240. PT0.125S °C mms2_fgm_etemp_srvy_l2 e13.5 LinearScale -1000.0 1000.0 NaN Scalar Other mms2_fgm_mode_srvy_l2 Time series defined by using: EPOCH mms2_fgm_mode_srvy_l2 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. 8=slow, 16=fast, 128=f128. Note that 128 samples/s L1A data is decimated to 16 samples/s in srvy L1B PT0.125S s^-1 mms2_fgm_mode_srvy_l2 e13.5 2.0 200.0 -1.0e+31 InstrumentMode mms2_fgm_rdeltahalf_srvy_l2 Time series defined by using: EPOCH_STATE mms2_fgm_rdeltahalf_srvy_l2 One half of the median delta between ephemeris samples PT0.125S s 1>s mms2_fgm_rdeltahalf_srvy_l2 e13.5 1.0 100.0 -1.0e+31 Median Temporal