2.5.0
spase://NASA/NumericalData/MMS/2/ASPOC/Survey/Level2/PT1S
MMS 2 Active Spacecraft Potential Control (ASPOC), Sensors 1 and 2, Level 2 (L2), Survey Mode, 1 s Data
MMS2_ASPOC_SRVY_L2
https://doi.org/10.48322/9712-0x57
2023-03-04T12:34:56.789
2021-04-27T15:38:11
Only known prior ReleaseDate of the metadata
2022-08-04T12:34:56.789
Added DOI and PublicationInfo minted by LFB, updated the RepositoryID, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220803
2023-03-04T12:34:56.789
Standardized the ResourceName Format, Set AlternateName equal to the ProductKey, Revised the Acknowledgement, PublicationInfo Authors, and Contact Person list per request of the MMS ASPOC team, metadata updated to SPASE 2.5.0, reviewed by LFB 20230304
MMS 2 Active Spacecraft Potential Control (ASPOC) - Sensors 1 and 2 Ion Beam Current Rates, Beam Energies, and Instrument Status variables. In tenuous plasma regions, the floating potential of a sunlit spacecraft is positively charged, reaching up to tens of Volts. The corresponding electric field disturbs the ambient plasma measurements obtained from electron and ion sensors and the large fluxes of attracted photo-electrons can significantly reduce the lifetime of the micro-channel plate. The electric field measurements can be also contaminated by the high spacecraft potential values. The Active Spacecraft Potential Control neutralizes the spacecraft potential by releasing positively charged Indium ions. The ASPOCs neutralize the electrical potential of the spacecraft, limiting or eliminating spurious electric fields that can contaminate measurements. This allows observations of the more scientifically important low-energy ions and electrons.
Please acknowledge R. Nakamura, K.M. Torkar, H. Jeszenszky, and J.L. Burch for use of these data
Nakamura, Rumi; Torkar, Klaus, M.; Jeszenszky, Harald; Burch, James, L.
2022-01-01T00:00:00
NASA Space Physics Data Facility
spase://SMWG/Person/Rumi.Nakamura
InstrumentLead
CoInvestigator
spase://SMWG/Person/Klaus.M.Torkar
InstrumentLead
CoInvestigator
Retired
spase://SMWG/Person/Harald.Jeszenszky
TechnicalContact
spase://SMWG/Person/James.L.Burch
PrincipalInvestigator
spase://SMWG/Person/MMS_SDC_POC
HostContact
spase://SMWG/Person/Robert.M.Candey
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/aspoc/
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 ASPOC Team home page at IWF, OAW
https://www.oeaw.ac.at/en/iwf/research/space-missions/current-missions/magnetospheric-multiscale/aspoc
The Magnetospheric Multiscale (MMS) ASPOC home page hosted by the Graz ASPOC team located at the Institut fur Weltraumforschung (IWF), Osterreichische Akademie der Wissenschaften (OAW).
spase://VSPO/NumericalData/MMS/2/ASPOC/Survey/Level2/PT1S
spase://SMWG/Repository/UCOLO/LASP/MMS_SDC
Online
Open
FTPS from the MMS SDC (not with most browsers)
ftps://lasp.colorado.edu/mms/sdc/public/data/mms2/aspoc/srvy/l2/
In CDF via ftp from the MMS Science Data Center
HTTPS from the MMS SDC
https://lasp.colorado.edu/mms/sdc/public/data/mms2/aspoc/srvy/l2/
In CDF via http from the MMS Science Data Center
CDF
None
Please acknowledge R. Nakamura, K.M. Torkar, H. Jeszenszky, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Online
Open
FTPS from SPDF (not with most browsers)
ftps://spdf.gsfc.nasa.gov/pub/data/mms/mms2/aspoc/srvy/l2/
In CDF via ftp from SPDF
HTTPS from SPDF
https://spdf.gsfc.nasa.gov/pub/data/mms/mms2/aspoc/srvy/l2/
In CDF via http from SPDF
CDAWeb
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=MMS2_ASPOC_SRVY_L2&index=sp_phys
MMS2_ASPOC_SRVY_L2
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
CDF
None
Please acknowledge R. Nakamura, K.M. Torkar, H. Jeszenszky, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Online
Open
CDAWeb HAPI Server
https://cdaweb.gsfc.nasa.gov/hapi
MMS2_ASPOC_SRVY_L2
Web Service to this product using the HAPI interface
CSV
Please acknowledge R. Nakamura, K.M. Torkar, H. Jeszenszky, and J.L. Burch. Also please acknowledge the data providers and CDAWeb when using these data.
Calibrated
spase://SMWG/Instrument/MMS/2/InstrumentControl/ASPOC
InstrumentStatus
2015-05-06T00:00:00.000
-P2M
PT1S
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 rounded to nearest msecond
This parameter exhibits an increasing monotonic progression.
PT1S
ns
1.0e-9>s
TimeSeries
Epoch
6.2798349819904e+13
6.6269642620904e+13
LinearScale
1990-01-01T00:00:00.000000000
2100-01-01T00:00:01.000000000
9999-12-31T23:59:59.999999999
Temporal
Beam Current Sum
Time series defined by using: EPOCH
mms2_aspoc_ionc
ASPOC Ion Emission Current Sum
PT1S
uA
1.0e-6>A
TimeSeries
I_ion
f5.1
0.0
100.0
LinearScale
0.0
100.0
-1.0e+31
Ion
Median
CountRate
Beam Current, Unit 1
Time series defined by using: EPOCH
mms2_asp1_ionc
ASPOC Unit 1 Ion Emission Current
PT1S
uA
1.0e-6>A
TimeSeries
I_ion
f5.1
0.0
100.0
LinearScale
0.0
100.0
-1.0e+31
Ion
Median
CountRate
Beam Current, Unit 2
Time series defined by using: EPOCH
mms2_asp2_ionc
ASPOC Unit 2 Ion Emission Current
PT1S
uA
1.0e-6>A
TimeSeries
I_ion
f5.1
0.0
100.0
LinearScale
0.0
100.0
-1.0e+31
Ion
Median
CountRate
Beam Energy, Unit 1
Time series defined by using: EPOCH
mms2_asp1_energy
ASPOC Unit 1 Emitted Beam Energy
PT1S
kV
1.0e3>V
TimeSeries
Energy
f5.2
0.0
12.5
LinearScale
0.0
12.5
-1.0e+31
Ion
Median
Energy
Beam Energy, Unit 2
Time series defined by using: EPOCH
mms2_asp2_energy
ASPOC Unit 2 Emitted Beam Energy
PT1S
kV
1.0e3>V
TimeSeries
Energy
f5.2
0.0
12.5
LinearScale
0.0
12.5
-1.0e+31
Ion
Median
Energy
Instrument Status
Time series defined by using: EPOCH
mms2_aspoc_status
ASPOC Instrument Status
PT1S
TimeSeries
i3
LinearScale
4
Data Quality
1
Data Quality
Unit 1 Mode
2
Unit 1 Mode
Unit 2 Mode
3
Unit 2 Mode
On/Off Status
4
On/Off Status
0
254
255
InstrumentMode
Half Interval
mms2_aspoc_var
Half width of measurement interval
PT1S
ns
1.0e-9>s
Half_int
f13.1
0.0
1.275e+10
Temporal