2.3.2 spase://NASA/NumericalData/RBSP/A/EFW/L2/MGSE/PT11S Van Allen Probe A Spinfit DC Electric Field estimates level-2 in M-GSE coordinates 2021-04-27T15:38:11Z This data set contains spinfit DC Electric Field estimates in M-GSE coordinates that are measured by the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. One 2D vector estimate of the E-field is computed at a cadence of once per spin period (typically 10.7 to 11.1 s) using the survey E-field data product - the potential difference between EFW sensors V1 and V2 (E12) sampled at a nominal rate of 32 samp/s with a resolution of 16 bits. The X-component of the E-field estimate, corresponding to the axial component in the spacecraft coordinate system, is set to zero in this data product. See the EFW-FAQ (http://rbsp.space.umn.edu/efw_faq.html) for a discussion of this convention for this data product. The VxB electric field in the spacecraft frame due to orbital motion of the spacecraft around the Earth as computed from the spacecraft orbital velocity and measured B-field in the spacraft frame has been subtracted from the measured electric field, and so the data product is in the quasi-inertial frame equivalent to GSE (i.e. it is NOT in the corotation frame of the Earth!). Each spin fit is time-tagged with the time corresponding to the middle of the spin of data that went into the spin fit algorithm; in other words, if a given spin covers the interval (t1, t2), then the spin fit E-field estimate associated with that spin is given the time tag 0.5*(t1 + t2). The root mean square residual between the data included in the fit and the resulting best-fit model, sigma, and the final number of points included in the spin fit, npts, are also provided at spin-period cadence. The nominal dynamic range of the E-field estimate is +/- 1 V/m in any component. NASA Space Physics Data Facility (SPDF) CDAWeb. spase://SMWG/Person/John.R.Wygant PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire GeneralContact EFW home page at the University of Minnesota http://rbsp.space.umn.edu Daily Summary Plots and additional L2 data The Van Allen Probes Home Page http://vanallenprobes.jhuapl.edu Science Gateway (including Mission Rules of the Road for Data Usage) spase://VSPO/NumericalData/RBSP/A/EFW/MGSE/PT11S spase://ViRBO/NumericalData/RBSP/A/EFW/L2/E-SPINFIT-MGSE/UTC spase://ViRBO/NumericalData/RBSPA_EFW-L2/UTC spase://VSPO/NumericalData/RBSP/A/EFW/L2/MGSE/PT11S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspa/l2/efw/e-spinfit-mgse/ In CDF via ftp from CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspa/l2/efw/e-spinfit-mgse/ In CDF via HTTP from SPDF CDF Please acknowledge the CDAWeb team at GSFC/SPDF. spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=RBSPA_EFW-L2_E-SPINFIT-MGSE&index=sp_phys RBSPA_EFW-L2_E-SPINFIT-MGSE Text spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi RBSPA_EFW-L2_E-SPINFIT-MGSE@0 RBSPA_EFW-L2_E-SPINFIT-MGSE@1 Web Service to this product using the HAPI interface. CSV spase://SMWG/Instrument/RBSP/A/EFW ElectricField 2012-09-05T14:36:16.000Z 2019-10-18T16:30:00Z PT11S Time, UTC epoch Time, UTC UTC Other Spinfit E-field in MGSE (near GSE) e12_spinfit_mgse Spinfit E-field in MGSE (autoscale, VxB subtracted, i.e. near GSE) Spin-fit electric field esimate in the MGSE coordinate system and GSE frame (VxB subtracted) derived from the EFW e12 (V1-V2) data product. 3 Other Spinfit E-field in MGSE (near GSE) e12_spinfit_mgse_fixedscale Spinfit E-field in MGSE (fixedscale, VxB subtracted, i.e. near GSE) Spin-fit electric field esimate in the MGSE coordinate system and GSE frame (VxB subtracted) derived from the EFW e12 (V1-V2) data product. 3 Other sigma12_spinfit_mgse sigma12_spinfit_mgse The sigma of the spin fit of each spin period from boom V12. The sigma of the spin fit of each spin period from boom V12. Other npoints12_spinfit_mgse npoints12_spinfit_mgse Number of points used in a spin fit of one spin period from boom V12. Number of points used in a spin fit of one spin period from boom V12. Other sfit_compno sfit_compno Spin-fit E-field component number Spin-fit E-field component number 3 Other VxB E-field in M-GSE coordinates. vxb_spinfit_mgse VxB E-field in MGSE coordinates. Electric field due to VxB, where V is spacecraft velocity and B is the measured ambient magnetic field. 3 Other Configuration (HSK) timetags, UTC epoch_hsk Configuration (HSK) timetags, UTC Configuration timetags. Used for BEB and DFB config values. msec Other EFW BEB Configuration e_spinfit_mgse_BEB_config EFW Boom Electronics Board (BEB) configuration code (on-board sensor biases Indicates the configuration of the EFW Boom Electronics Board (BEB). Encodes the following information: for each sensor, sensor current bias, usher and guard voltage bias. See EFW-FAQ (http://rbsp.space.umn.edu/efw_faq.html) for a detailed description of the mapping between code value and instrument configuration (not crucial for L2 data interpretation).. Other EFW DFB Configuration e_spinfit_mgse_DFB_config EFW Digital Fields Board (DFB) Configuration code (on-board spectral and waveform processing configuration) Indicates the configuration of the EFW Digital Filter Board (DFB). Encodes the following information: assignment of analog input channels to the various on-board spectral processors (FBK, SPEC, XSPEC); parameters of the on-board B-field-aligned data processing; nominal or contingency multiplexer programming. See EFW-FAQ (http://rbsp.space.umn.edu/efw_faq.html) for a detailed description of the mapping from code value to instrument configuration (not crucial for L2 data interpretation).. Other Time, UTC epoch_qual Timetags for elements of efw_qual. The elements of efw_qual are determined on a fixed cadence regardless of the nominal cadence of the individual L2 data products, and epoch_qual provides storage for those fixed-cadence time tags.. UTC Other EFW Data Quality Flags e_spinfit_mgse_efw_qual EFW quality array (global estimate of EFW data quality, plus 13 underlying observatory and instrument-level data quality factors) 20 Other EFW Quality Flags Components efw_qual_compno Component numbers for EFW data quality flags, efw_qual.. none.. 20 Other