This data set contains Level 2 wave electric field and search coil wave magnetic fields spectral data from the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. Spectrograms between ~40 Hz and ~8 kHz are calculated on-board the EFW instrument every 4 seconds. These data include one component of the ac-coupled electric field from the rotating V12 sensors (V12ac). The electric field quantity is labeled EFW/L2. Also included are two components of the wave magnetic field from the University of Iowa EMFISIS sensors. The search coil quantities are labeled EFW/L2 spec64 smu. In the labels "smu" and "smv", the suffixes "u" and "v" refer to the u and v sensor coordinates rotating with the spacecraft. All these quantities, the nature of the on board signal processing, their filtering, time resolution and their respective coordinate systems are described in the EFW instrument paper (Wygant et al. 2013).
When the spectral CDF is opened, many other possible quantities are listed which have no data in them. Possible sources include: E12dc, E34dc, E56dc, E12ac, E34ac, E56ac, E DC parallel, E DC perpendicular 1, E DC perpendicular 1, E AC parallel, E AC perpendicular 1, E AC perpendicular 2, V1+V2+V3+V4/4AC, SCMu, SCMv, SCMw, SCM parallel, SCM perpendicular 1 and SCM perpendicular 2.
Those without data are "place holder quantities" which are used by other instrument modes not currently selected. Examples of the spectral data may be found in Principal Investigator's on-line survey data plots. EMFISIS instrument wave data may be found on the University of Iowa website. This includes valuable spectral electric field data up to 400 kHz and magnetic field data up to about ~6 kHz.
Version:2.2.9
This data set contains Level 2 wave electric field and search coil wave magnetic fields spectral data from the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. Spectrograms between ~40 Hz and ~8 kHz are calculated on-board the EFW instrument every 4 seconds. These data include one component of the ac-coupled electric field from the rotating V12 sensors (V12ac). The electric field quantity is labeled EFW/L2. Also included are two components of the wave magnetic field from the University of Iowa EMFISIS sensors. The search coil quantities are labeled EFW/L2 spec64 smu. In the labels "smu" and "smv", the suffixes "u" and "v" refer to the u and v sensor coordinates rotating with the spacecraft. All these quantities, the nature of the on board signal processing, their filtering, time resolution and their respective coordinate systems are described in the EFW instrument paper (Wygant et al. 2013).
When the spectral CDF is opened, many other possible quantities are listed which have no data in them. Possible sources include: E12dc, E34dc, E56dc, E12ac, E34ac, E56ac, E DC parallel, E DC perpendicular 1, E DC perpendicular 1, E AC parallel, E AC perpendicular 1, E AC perpendicular 2, V1+V2+V3+V4/4AC, SCMu, SCMv, SCMw, SCM parallel, SCM perpendicular 1 and SCM perpendicular 2.
Those without data are "place holder quantities" which are used by other instrument modes not currently selected. Examples of the spectral data may be found in Principal Investigator's on-line survey data plots. EMFISIS instrument wave data may be found on the University of Iowa website. This includes valuable spectral electric field data up to 400 kHz and magnetic field data up to about ~6 kHz.
| Role | Person | |
|---|---|---|
| 1. | PrincipalInvestigator | spase://SMWG/Person/John.R.Wygant |
| 2. | GeneralContact | spase://SMWG/Person/Robert.E.McGuire |
EFW Data Required Reading
Science Gateway (including Mission Rules of the Road for Data Usage)
In CDF via ftp from CDAWeb
In CDF via HTTP from SPDF
spec64_fcenter
spec32_fcenter
spec112_fcenter
spec64_compno
spec36_compno
spec112_compno
Time, UTC
[64 FREQUENCIES] E12 DC
E12 AC
E34 DC
E34 AC
E56 DC
E56 AC
[64 FREQUENCIES] E-parallel DC
E-perpendicular-1 DC
E-parallel AC
E-perpendicular-1 AC
E-perpendicular-2 DC
E-perpendicular-2 AC
[64 FREQUENCIES] V1 AC
V2 AC
V3 AC
V4 AC
V5 AC
V6 AC
(V1+V2+V3+V4)/4 AC
[64 FREQUENCIES] SCM u
SCM v
SCM w
--> SCM parallel
SCM perpendicular-1
SCM perpendicular-2
[36 FREQUENCIES] E12 DC
E12 AC
E34 DC
E34 AC
E56 DC
E56 AC
[36 FREQUENCIES] E-parallel DC
E-perpendicular-1 DC
E-parallel AC
E-perpendicular-1 AC
E-perpendicular-2 DC
E-perpendicular-2 AC
[36 FREQUENCIES] V1 AC
V2 AC
V3 AC
V4 AC
V5 AC
V6 AC
(V1+V2+V3+V4)/4 AC
[36 FREQUENCIES] SCM u
SCM v
SCM w
--> SCM parallel
SCM perpendicular-1
SCM perpendicular-2
[112 FREQUENCIES] E12 DC
E12 AC
E34 DC
E34 AC
E56 DC
E56 AC
[112 FREQUENCIES] E-parallel DC
E-perpendicular-1 DC
E-parallel AC
E-perpendicular-1 AC
E-perpendicular-2 DC
E-perpendicular-2 AC
[112 FREQUENCIES] V1 AC
V2 AC
V3 AC
V4 AC
V5 AC
V6 AC
(V1+V2+V3+V4)/4 AC
[112 FREQUENCIES] SCM u
SCM v
SCM w
--> SCM parallel
SCM perpendicular-1
SCM perpendicular-2
Timetags for elements of efw_qual
An array that indicates a global estimate of EFW data quality, as well as a breakdown of observatory and instrument-level data quality issues that impact the global quality estimate..
Component numbers for EFW data quality flags, efw_qual.