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Van Allen Probe A DC-coupled EFW 1-second sensor potentials relative to spacecraft in volts

(2022). Van Allen Probe A DC-coupled EFW 1-second sensor potentials relative to spacecraft in volts [Data set]. NASA Space Physics Data Facility. https://doi.org/10.48322/7mwt-de58 (CiteAs link). Accessed on .

ResourceID
spase://NASA/NumericalData/RBSP/A/EFW/L2/VSVY/PT1S

Description

This data set contains DC-coupled sensor potentials and negative of spacecraft potential relative to sensor floating potentials from the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. All six EFW sensor potentials are included. Also included are average potentials from opposing booms, i.e., (V1+V2)/2, (V3+V4)/2, and (V5+V6)/2, from autoscale and fixed scale (-15 to 5 V). These quantities are the negative of the spacecraft potential relative to the sensor floating potential, and have the contribution from the external electric field removed. Four spin-plane components of the electric field are measured at DC-12 Hz with 0.05 mV/m accuracy, and two spin-axis components, with ~3 mV/m accuracy. Spacecraft potentials cover cold plasma densities of 0.1 to ~100 cm-3 at 1-second cadence. The default sampling rate is 16 samp/s at 16-bit resolution, covering a +/- 225-V range. Further details on the EFW instrument in general or these data in particular can be found in the EFW Instrument paper, Wygant et al., 2013 (Space Science Reviews; submitted, 02/2013).

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Details

Version:2.4.1

NumericalData

ResourceID
spase://NASA/NumericalData/RBSP/A/EFW/L2/VSVY/PT1S
ResourceHeader
ResourceName
Van Allen Probe A DC-coupled EFW 1-second sensor potentials relative to spacecraft in volts
DOI
https://doi.org/10.48322/7mwt-de58
ReleaseDate
2022-08-18 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-08-18 12:34:56.789
Note
Added DOI and PublicationInfo minted by LFB, updated InformationURL URLs as needed, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220818
Description

This data set contains DC-coupled sensor potentials and negative of spacecraft potential relative to sensor floating potentials from the Electric Field and Waves Suite (EFW) onboard Van Allen Probe A. All six EFW sensor potentials are included. Also included are average potentials from opposing booms, i.e., (V1+V2)/2, (V3+V4)/2, and (V5+V6)/2, from autoscale and fixed scale (-15 to 5 V). These quantities are the negative of the spacecraft potential relative to the sensor floating potential, and have the contribution from the external electric field removed. Four spin-plane components of the electric field are measured at DC-12 Hz with 0.05 mV/m accuracy, and two spin-axis components, with ~3 mV/m accuracy. Spacecraft potentials cover cold plasma densities of 0.1 to ~100 cm-3 at 1-second cadence. The default sampling rate is 16 samp/s at 16-bit resolution, covering a +/- 225-V range. Further details on the EFW instrument in general or these data in particular can be found in the EFW Instrument paper, Wygant et al., 2013 (Space Science Reviews; submitted, 02/2013).

Acknowledgement
NASA Space Physics Data Facility (SPDF) CDAWeb.
PublicationInfo
Authors
J.R. Wygant
PublicationDate
2022-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
RolePersonStartDateStopDateNote
1.PrincipalInvestigatorspase://SMWG/Person/John.R.Wygant
2.GeneralContactspase://SMWG/Person/Robert.M.Candey
3.MetadataContactspase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
EFW home page at the University of Minnesota
URL
http://rbsp.space.umn.edu
Description

Daily Summary Plots and additional L2 data

InformationURL
Name
The Van Allen Probes Home Page
URL
https://vanallenprobes.jhuapl.edu
Description

Science Gateway (including Mission Rules of the Road for Data Usage)

PriorIDs
spase://VSPO/NumericalData/RBSP/A/EFW/VSVY/PT1S
spase://ViRBO/NumericalData/RBSPA_EFW-L2/
spase://VSPO/NumericalData/RBSP/A/EFW/L2/VSVY/PT1S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWEB
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspa/l2/efw/vsvy-highres/
Description

In CDF via ftp from CDAWeb

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/rbsp/rbspa/l2/efw/vsvy-highres/
Description

In CDF via HTTP from SPDF

Format
CDF
Acknowledgement
Please acknowledge the CDAWeb team at GSFC/SPDF.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWEB
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=RBSPA_EFW-L2_VSVY-HIRES&index=sp_phys
ProductKey
RBSPA_EFW-L2_VSVY-HIRES
Format
Text
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWEB
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
RBSPA_EFW-L2_VSVY-HIRES@0
ProductKey
RBSPA_EFW-L2_VSVY-HIRES@1
Description

Web Service to this product using the HAPI interface.

Format
CSV
InstrumentIDs
spase://SMWG/Instrument/RBSP/A/EFW
MeasurementType
ElectricField
TemporalDescription
TimeSpan
StartDate
2012-09-05 14:36:00.000Z
StopDate
2019-10-18 16:30:00Z
Cadence
PT1S
Parameter #1
Name
Time, UTC
ParameterKey
epoch
Description

Time, UTC

Caveats
Time tags for the survey quantities
Units
UTC
Mixed
MixedQuantity
Other
Parameter #2
Name
EFW Sensor Voltages, V1..V6.
ParameterKey
vsvy
Description

EFW Sensor Voltages, V1..V6.

Caveats
EFW Sensor voltages relative to spacecraft ground.
Structure
Size
6
Mixed
MixedQuantity
Other
Parameter #3
Name
Average potential from opposing booms
ParameterKey
vsvy_vavg
Description

Average potential from opposing booms (autoscale)

Structure
Size
3
Mixed
MixedQuantity
Other
Parameter #4
Name
Average potential from opposing booms
ParameterKey
vsvy_vavg_fixedscale
Description

Average potential from opposing booms (fixed scale -15 to 5 V)

Structure
Size
3
Mixed
MixedQuantity
Other
Parameter #5
Name
Configuration (HSK) timetags, UTC
ParameterKey
epoch_hsk
Description

Configuration (HSK) timetags, UTC.

Caveats
Configuration timetags. Used for BEB and DFB config values..
Units
UTC
Mixed
MixedQuantity
Other
Parameter #6
Name
EFW BEB Configuration
ParameterKey
vsvy_BEB_config
Description

EFW Boom Electronics Board (BEB) configuration code (sensor biases)

Caveats
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 TBD_URL for details of mapping between code value and instrument configuration (not crucial for L2 data interpretation).
Mixed
MixedQuantity
Other
Parameter #7
Name
EFW DFB Configuration
ParameterKey
vsvy_DFB_config
Description

EFW Digital Fields Board (DFB) configuration code (on-board spectral and waveform processing configuration)

Caveats
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 TBD URL for detailed mapping from code value to instrument configuration (not crucial for L2 data interpretation).
Mixed
MixedQuantity
Other
Parameter #8
Name
Time, UTC
ParameterKey
epoch_qual
Description

Timetags for elements of efw_qual.

Caveats
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..
Units
UTC
Mixed
MixedQuantity
Other
Parameter #9
Name
EFW Data Quality Flags
ParameterKey
efw_qual
Description

EFW quality array (global estimate of EFW data quality, plus 13 underlying observatory and instrument-level data quality factors)

Structure
Size
20
Mixed
MixedQuantity
Other
Parameter #10
Name
EFW Quality Flags Components
ParameterKey
efw_qual_compno
Description

Component numbers for EFW data quality flags, efw_qual.

Caveats
none.
Structure
Size
20
Mixed
MixedQuantity
Other