<?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://amda.irap.omp.eu/public/schemas/spase-2_3_1.xsd">
<Version>2.3.1</Version>
<NumericalData>
<ResourceID>spase://CNES/NumericalData/CDPP-AMDA/Rosetta/LAP/ros-lap-nel</ResourceID>
<ResourceHeader>
<ResourceName>plasma density (NEL)</ResourceName>
<AlternateName>Plasma density which contains the highest time resolution cross-calibrated density data,
when RPC-MIP is not delivering cross-calibrated density products</AlternateName>
<ReleaseDate>2016-10-15T14:08:29Z</ReleaseDate>
<Description>This data set is based on LAP data with use of a long-term LAP-MIP cross calibration for some time intervals
when MIP-LAP density is not available. Plasma density derived from individual current
measurements or floating potential measurements on one probe.
This is a preliminary data set which will be replaced by another in a few months.
</Description>
<Contact>
<PersonID>spase://CNES/Person/Anders.Eriksson</PersonID>
<Role>PrincipalInvestigator</Role>
</Contact>
<Contact>
<PersonID>spase://CNES/Person/Erik.Johansson</PersonID>
<Role>DataProducer</Role>
</Contact>
<InformationURL>
<Name>RPC User Guide</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RPC_USER_GUIDE.PDF</URL>
</InformationURL>
<InformationURL>
<Name>RPC LAP User Guide</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RO-IRFU-LAP-UG.PDF</URL>
</InformationURL>
<InformationURL>
<Name>RPC-LAP to Planetary Science Archive Interface Control Document</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RO-IRFU-LAP-EAICD.PDF</URL>
</InformationURL>
<InformationURL>
<Name>RPC-LAP Report on cross-calibration of LAP data to measurements by other RPC instruments</Name>
<URL>http://amda.irap.omp.eu/help/parameters/RO-IRFU-LAP-XCAL_1_0_PDF_A-1b.PDF</URL>
</InformationURL>
</ResourceHeader>
<AccessInformation>
<RepositoryID>spase://SMWG/Repository/CNES/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-NEL-V1.0</ProviderResourceName>
<InstrumentID>spase://CNES/Instrument/CDPP-AMDA/Rosetta/LAP</InstrumentID>
<MeasurementType>ThermalPlasma</MeasurementType>
<TemporalDescription>
<TimeSpan>
<StartDate>2014-03-24T08:12:59Z</StartDate>
<StopDate>2016-09-30T10:31:16Z</StopDate>
</TimeSpan>
<CadenceMin>PT0.016S</CadenceMin>
<CadenceMax>PT128S</CadenceMax>
</TemporalDescription>
<Caveats>
It is highly recommended to take into account quality value while working with plasma density.
* Parameter n_e_good corresponds to n_e quality gt 0.2
* Parameter n_e - all n_e quality values
* Note that you can colorize n_e parameter with the quality value (use ColoredParameter field of Plot Interface).
* Please always download quality value along with the n_e parameter.
Data Source :
* 1 - Downsampled floating potential measurement for an illuminated LAP1
* 2 - Downsampled floating potential measurement for an illuminated LAP2
* 3 - Vz for LAP1
* 4 - Vz for LAP1, but using a linearly extrapolated sweep
Quality Flag :
A quality flag is a (base 10) integer that is constructed in the two steps below:
* Add together the constants associated with the relevant quality-related effects listed below. Note that these constants are chosen such that every digit represents up to three true/false values for the presence/absence of three specific separate quality-related effects.
* Should the three quality-related effects be irrelevant for the given data product, then that digit is replaced by the digit “9”.
Quality flag event description :
* +1 - Low quality sweep analysis model fit
* +2 - One of two meanings: (1) Low sample size; an average is based on fewer data points than nominal (due to filtering or otherwise) and applies to sweep steps and downsampled time series. (2) zero-padding; zeros replace lost samples for the purpose of calculating PSD.
* +10 - One of two meanings: (1) Sweep data product and data products based on sweeps: SAA rotation of more than 0.05° during sweep. (2) Downsampled time series data product: Bias change within the 32 s downsampling period.
* +20 - Probe in partial or full shadow
* +100 - Rosetta wheel off-loading (WOL) or Orbit-control-maneuver (OCM)
* +200 - One of two meanings: (1) For LAP1: LDL disturbance (LAP2 in LDL mode); (2) For LAP2: Contamination signature possibly present
* +400 - Saturation
Example: suppose that one encounters the quality flag “109”. 109 = 100 + 9 means (1) that there is an ongoing wheel off-loading (+100), and (2) that the quality-related effects associated with +1 and +2 cannot occur even in principle for the kind of data that one is looking at.
</Caveats>
<Parameter>
<Name>n_e_good (qual_nel> 0.2)</Name>
<ParameterKey>ros_lap_nel_good</ParameterKey>
<Description>Plasma density which contains the highest time resolution cross-calibrated density data,
when RPC-MIP is not delivering cross-calibrated density products. Quality value > 0.2</Description>
<Units>cm^-3</Units>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue>0.0</FillValue>
</Parameter>
<Parameter>
<Name>n_e (nel)</Name>
<ParameterKey>ros_lap_nel</ParameterKey>
<Description>Plasma density which contains the highest time resolution cross-calibrated density data,
when RPC-MIP is not delivering cross-calibrated density products</Description>
<Ucd/>
<Units>cm^-3</Units>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue>-1.e+09</FillValue>
</Parameter>
<Parameter>
<Name>n_e : qual</Name>
<ParameterKey>ros_lap_nel_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_nel_s</ParameterKey>
<Ucd/>
<Units/>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue></FillValue>
</Parameter>
<Parameter>
<Name>quality flag</Name>
<ParameterKey>ros_lap_nel_f</ParameterKey>
<Description>Quality flag constructed as the sum of multiple terms,
depending on what quality related effects are present. Each digit is either in
the range 0 (best) to 7 (worst), or 9 (not used)</Description>
<Ucd/>
<Units/>
<RenderingHints>
<DisplayType>TimeSeries</DisplayType>
</RenderingHints>
<FillValue></FillValue>
</Parameter>
</NumericalData>
</Spase>