2.3.2 spase://NASA/NumericalData/RBSP/B/EFW/L3/PT11S Van Allen Probe B Electric Fields and Waves (EFW) Spin-fit Electric field in modified-GSE (MGSE) coord, density, and other products 2021-04-27T15:38:11Z This data set contains Level 3 wave electric field and search coil wave magnetic fields data from the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. The spin-fit electric field (spin period resolution) tends to be the most accurate electric field measurement. However, as always, due diligence by the user/scientists must be exercised in using these data. The spin-fit electric field is provided in both an inertial and co-rotating frame. The electric field is presented in a MGSE (modified GSE) coordinate system. We provide two components (Y MGSE and Z MGSE) of the electric field. Both components are in the spin plane of the spacecraft and are measured with the long 50 m booms. The X MGSE component is along the spin-axis. The spin-axis of the spacecraft is oriented within 37 degrees of the Earth sun line. So the Y GSE direction is most nearly aligned with the Y MGSE axis and the Z MGSE direction is most nearly aligned with Z GSE. NASA Space Physics Data Facility (SPDF) CDAWeb. The work by the EFW team was conducted under JHU/APL contract 922613 (RBSP-EFW) spase://SMWG/Person/John.R.Wygant PrincipalInvestigator spase://SMWG/Person/Robert.E.McGuire GeneralContact EFW home page at the University of Minnesota http://www.space.umn.edu/rbspefw-data-policy-the-rules-of-the-road/ EFW Data Required Reading The Van Allen Probes Home Page http://vanallenprobes.jhuapl.edu Science Gateway (including Mission Rules of the Road for Data Usage) spase://VWO/NumericalData/RBSP/B/EFW/L3/PT11S spase://VSPO/NumericalData/RBSP/B/EFW/L3/PT11S spase://SMWG/Repository/NASA/GSFC/SPDF Online Open FTPS from SPDF (not with most browsers) ftps://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspb/l3/efw/ In CDF via ftp from CDAWeb HTTPS from SPDF https://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspb/l3/efw/ In CDF via HTTP from SPDF CDF Please acknowledge the PI and 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=RBSPB_EFW-L3&index=sp_phys RBSPB_EFW-L3 Text spase://SMWG/Repository/NASA/GSFC/SPDF Online Open CDAWeb HAPI Server https://cdaweb.gsfc.nasa.gov/hapi RBSPB_EFW-L3 Web Service to this product using the HAPI interface. CSV spase://SMWG/Instrument/RBSP/B/EFW ElectricField Waves 2012-09-18T00:00:06.000Z 2019-10-18T16:30:00Z PT11S Time, UTC epoch Time tags for the data quantities UTC Temporal Density estimation from sc potential density Density estimation from sc potential, determined from the form density = A1*exp(b*x)+A2*exp(c*x), where x=(V1 + V2)/2, where the constants are found by comparison to upper hybrid line from EMFISIS. The fit is updated approximately monthly. For a more accurate density (or verification) for a specific time period contact the EFW team. Values below 10cm-3 and above 3000 cm-3 are untrustworthy and are removed cm-3 Electron NumberDensity EFW Global Data Quality flag_global 0=OK 20 Other EFW Data Quality Flags flags_all The quality of EFW data products can be affected by a variety of observatory and instrument-level conditions. efw_qual is a collection of flags that show the estimate of each of these contributors over time. ..See the EFW-FAQ (http://www.space.umn.edu/rbspefw-data-policy-the-rules-of-the-road/) for a detailed description of the determination and meaning of each of the elements of efw_qual...If the value of a particular element of efw_qual is not relevant to the quality of a particular data product, it shall receive the value -2...If the value of a particular element of efw_qual is relevant to the quality of a particular data product but is not known at the time lf L2 data production, it shall receive the value -1...A quality value of 0 indicates that there are no known issues with the data product due to that particular element of efw_qual...The quality values are meant to be conservative, and values other than 0 should lead the user back to a member of the EFW instrument team for discussion and advice on the nature of the data quality as needed. 20 Other Charging, Bias and Eclipse flags flags_charging_bias_eclipse For Spacecraft Charging Issues see http://www.space.umn.edu/rbspefw-data-policy-the-rules-of-the-road/ Other Ein - Inertial frame spinfit electric field in MGSE coord system efield_inertial_frame_mgse Inertial frame spinfit electric field in MGSE coord system. Derived from the V1 and V2 spinplane booms. The Vsc x B field is subtracted off, where Vsc is the spacecraft velocity and B is the measured ambient magnetic field mV/m 3 Electric Eco - Corotation frame spinfit electric field in MGSE coord system efield_corotation_frame_mgse Corotation frame spinfit electric field in MGSE coord system. Derived from the V1 and V2 spinplane booms. The Vsc x B field is subtracted off, where Vsc is the spacecraft velocity and B is the measured ambient magnetic field mV/m 3 Electric Vco x B - Corotation vxB Efield in MGSE coord. VcoroxB_mgse Corotation Efield calculated from Omega x R x B in MGSE coord. Omega is the Earth's spin axis vector and R is the vector from the Earth's center to the satellite mV/m 3 Electric Vsc x B - Spacecraft vxB Efield calculated in MGSE coord. VscxB_mgse Vsc x B in MGSE coord, where Vsc is the spacecraft velocity and B is the DC magnetic field mV/m 3 Electric GSE position (km) from SPICE pos_gse GSE position (km) from SPICE km 3 Positional GSE velocity in km/s from SPICE vel_gse GSE position (km) from SPICE km/s 3 Velocity Spinaxis unit vector in GSE coord spinaxis_gse Spinaxis unit vector in GSE coord 3 Positional Vavg - SCpot (neg) as average of opposing boom potentials (V1+V2)/2 and a proxy for plasma density. Vavg Average of opposing boom potentials (V1+V2)/2. This is a proxy for plasma density. Positive excursions can indicate negative spacecraft charging. volts Potential MLT, Lshell and Mlat mlt_lshell_mlat MLT, Lshell and Mlat 3 Positional Nominal Sensor Saturation Voltage (V) vsvy_maxval The maximum magnitude of the sensor potential relative to SC potential at which the sensor preamp likely to be saturated during nominal biasing conditions..If the magnitude of a given sensor potential exceeds vsvy_maxval then the corresponding element of efw_qua.l (v1_saturation .. v6-saturation) shall be set to indicate that state. vsvy_maxval is set in the L1>L2 processing scripts, and shall be copied into this variable during L2 CDF creation. Other EFW_QUAL_NR EFW_QUAL_NR EFW_QUAL_NR is the value (typ. -2) an element of efw_qual takes when the criterion represented by that element is not relevant for the given data product. Other EFW_QUAL_GOOD EFW_QUAL_GOOD EFW_QUAL_GOOD is the value (0) of an element of efw_qual that indicates good data. Other EFW_QUAL_UNK EFW_QUAL_UNK EFW_QUAL_UNK is the value (typ. -1) an element of efw_qual that indicates the quality is unknown. Other