ros-lap-usc.xml
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<?xml version="1.0" encoding="UTF-8"?>
<Spase xmlns="http://www.spase-group.org/data/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.spase-group.org/data/schema http://cdpp.irap.omp.eu/AMDA-NG/public/schemas/spase-amda-1_2_0.xsd">
<Version>2.2.6</Version>
<NumericalData>
<ResourceID>spase://CDPP/NumericalData/AMDA/Rosetta/LAP/ros-lap-usc</ResourceID>
<ResourceHeader>
<ResourceName>s/c potential (USC)</ResourceName>
<AlternateName>Spacecraft potential</AlternateName>
<ReleaseDate>2016-10-15T14:08:29Z</ReleaseDate>
<Description>For most science purposes, the most useful s/c potential estimate is the U_SC data product
which is available at 32 to 160 second resolution and covers
most of the mission.
Depending on instrument operational mode, this is taken either from the
average over 32 s of measured voltage of a sunlit LAP probe (preferably LAP1) floating with
no bias current or voltage applied, sometimes known as Vfloat, or by the equivalent estimate from Langmuir
probe bias sweeps, which the voltage Vz at which the current to the probe is
zero. We expect U_SC to differ from the true spacecraft potential
by a small offset (due to the potential over the probe sheath, of order one volt) and a factor
(typically 75-80%) due to some part of the potential field from the spacecraft remaining at the
probe position.
A parameter DATA_SOURCE indicats which of these methods have been
used for every single sweep.</Description>
<Contact>
<PersonID>spase://CDPP/Person/Anders.Eriksson</PersonID>
<Role>PrincipalInvestigator</Role>
</Contact>
<Contact>
<PersonID>spase://CDPP/Person/Erik.Johansson</PersonID>
<Role>DataProducer</Role>
</Contact>
<InformationURL>
<Name>RPC LAP User Guide</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RO-IRFU-LAP-UG.PDF</URL>
</InformationURL>
<InformationURL>
<Name>ROSETTA RPC-LAP to Planetary Science Archive Interface Control Document</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RO-IRFU-LAP-EAICD_2_0_1_PDF_A.PDF</URL>
</InformationURL>
</ResourceHeader>
<AccessInformation>
<RepositoryID>spase://SMWG/Repository/CDPP/AMDA</RepositoryID>
<Availability>Online</Availability>
<AccessRights>Restricted</AccessRights>
<AccessURL>
<URL>http://amda.cdpp.eu</URL>
</AccessURL>
<Format>NetCDF</Format>
</AccessInformation>
<ProviderName>PSA</ProviderName>
<ProviderResourceName>RO-C-RPCLAP-5-xxx-DERIV2-V1.0</ProviderResourceName>
<InstrumentID>spase://CDPP/Instrument/AMDA/Rosetta/LAP</InstrumentID>
<MeasurementType>ThermalPlasma</MeasurementType>
<TemporalDescription>
<TimeSpan>
<StartDate>2014-03-24T08:12:59Z</StartDate>
<StopDate>2016-09-30T10:31:16Z</StopDate>
</TimeSpan>
<Cadence_Min>PT32S</Cadence_Min>
<Cadence_Max>PT160S</Cadence_Max>
</TemporalDescription>
<Parameter>
<Name>u_sc</Name>
<ParameterKey>ros_lap_usc</ParameterKey>
<Ucd/>
<Units>V</Units>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue/>
</Parameter>
<Parameter>
<Name>quality value</Name>
<ParameterKey>ros_lap_usc_q</ParameterKey>
<Description>Quality value in the range 0 (worst) to 1 (best).
Corresponds to goodness of fit or how well the model fits the data.</Description>
<Ucd/>
<Units/>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue></FillValue>
</Parameter>
<Parameter>
<Name>data source</Name>
<ParameterKey>ros_lap_usc_s</ParameterKey>
<Ucd/>
<Units/>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue></FillValue>
</Parameter>
<Parameter>
<Name>quality flag</Name>
<ParameterKey>ros_lap_usc_f</ParameterKey>
<Ucd/>
<Units/>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue></FillValue>
</Parameter>
</NumericalData>
</Spase>