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ODV for Data Products. Reiner Schlitzer , Alfred Wegener Institute, Bremerhaven , Germany. Providing data QC as well as outlier flagging and filtering . Providing data file aggregation and production of large integrated datasets .

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odv for data products

ODV for Data Products

Reiner Schlitzer,

Alfred Wegener Institute,

Bremerhaven, Germany

slide2

Providing data QC as well as outlier flagging and filtering.

Providing data file aggregation and production of large integrated datasets.

Providing production of time-series plots, maps, sections and animated3Dplots.

slide3

Visual Quality Control

  • easy spottingandidentification of outliersoroffsets
  • painlessediting of datavalueandqualityflag
  • logging of all valueorflagmodifications
slide4

Automatic Range Checks

  • full sample set
  • sample sub-set
slide5

QF MassAssignments

  • all samples of manyor all stations (initialization)
  • all samples in a window
  • all orsomeselectedsamples of currentstation
  • current sample only
slide6

Using Quality Flag Filters

Before filtering

After filtering

slide7

File Aggregation

Multi-fileimport (analysisandaggregationphases).

slide8

File Analysis

  • Use//SDN_parameter_mappingsection
  • Determine type of data (profile, time-series, trajectory).

//SDN_parameter_mapping

//<subject>SDN:LOCAL:PRESSURE</subject><object>SDN:P011::PRESPS01</object><units>SDN:P061::UPDB</units>

//<subject>SDN:LOCAL:T90</subject><object>SDN:P011::TEMPS901</object><units>SDN:P061::UPAA</units>

//<subject>SDN:LOCAL:Salinity</subject><object>SDN:P011::PSALPR02</object><units>SDN:P061::UUUU</units>

//<subject>SDN:LOCAL:fluorescence</subject><object>SDN:P011::CPHLPM01</object><units>SDN:P061::UGPL</units>

//<subject>SDN:LOCAL:Trans_red_25cm</subject><object>SDN:P011::POPTDR01</object><units>SDN:P061::UPCT</units>

//<subject>SDN:LOCAL:POTM</subject><object>SDN:P011::POTMCV01</object><units>SDN:P061::UPAA</units>

//<subject>SDN:LOCAL:Density</subject><object>SDN:P011::SIGTPR01</object><units>SDN:P061::UKMC</units>

slide9

Aggregation

  • ODV collectionsarecreatedforeverydata type found.
  • Data of a givenfileareimportedintothecorresponding ODV collection.
  • Processisfullyautomatic.
  • Results in oneormore ODV collectionscontaining all data of a given type.
slide10

Aggregated Variables

//

//SDN_parameter_mapping

//<subject>SDN:LOCAL:DEPH</subject><object>SDN:P011::ADEPZZ01</object><units>SDN:P061::ULAA</units>

//<subject>SDN:LOCAL:PRES</subject><object>SDN:P011::PRESPR01</object><units>SDN:P061::UPDB</units>

//<subject>SDN:LOCAL:TEMP</subject><object>SDN:P011::TEMPPR01</object><units>SDN:P061::UPAA</units>

//<subject>SDN:LOCAL:PSAL</subject><object>SDN:P011::PSLTZZ01</object><units>SDN:P061::UUUU</units>

//<subject>SDN:LOCAL:DOX1</subject><object>SDN:P011::DOXYZZXX</object><units>SDN:P061::UMLL</units>

//<subject>SDN:LOCAL:DOXY</subject><object>SDN:P011::DOXYZZXX</object><units>SDN:P061::UPOX</units>

//<subject>SDN:LOCAL:TUR4</subject><object>SDN:P011::TURBXXXX</object><units>SDN:P061::USTU</units>

//<subject>SDN:LOCAL:NTRA</subject><object>SDN:P011::NTRAZZXX</object><units>SDN:P061::UPOX</units>

//<subject>SDN:LOCAL:SLCA</subject><object>SDN:P011::SLCAZZXX</object><units>SDN:P061::UPOX</units>

//<subject>SDN:LOCAL:PHPH</subject><object>SDN:P011::PHXXZZXX</object><units>SDN:P061::UUPH</units>

//<subject>SDN:LOCAL:CORG</subject><object>SDN:P011::CORGZZZX</object><units>SDN:P061::UPOX</units>

//<subject>SDN:LOCAL:POCP</subject><object>SDN:P011::MDMAP010</object><units>SDN:P061::UMMC</units>

//<subject>SDN:LOCAL:TSMP</subject><object>SDN:P011::TSEDZZZZ</object><units>SDN:P061::UMGL</units>

//

//

//SDN_parameter_mapping

//<subject>SDN:LOCAL:DEPTH</subject><object>SDN:P011::ADEPZZ01</object><units>SDN:P061::ULAA</units>

//<subject>SDN:LOCAL:Temperature</subject><object>SDN:P011::TEMPS901</object><units>SDN:P061::UPAA</units>

//<subject>SDN:LOCAL:Salinity</subject><object>SDN:P011::ODSDM021</object><units>SDN:P061::UUUU</units>

//<subject>SDN:LOCAL:Oxygen</subject><object>SDN:P011::DOXYCZ01</object><units>SDN:P061::KGUM</units>

//

slide11

When aggregating SDN files different BODC parameter/unit codes are maintained as separate variables (e.g., 3 oxygen variables).

User may combine separate variables by means of aggregated derived variables (e.g., 1 oxygen variable for scientific usage).

slide12

Aggregatedderived variable

Oxygen [ml/l]=

1 * (DOX1 DISSOLVED OXYGEN ml/l) + 0

0.02297 * (DOX2 DISSOLVED OXYGEN micromole/kg) + 0

0.02241 * (DOXY DISSOLVED OXYGEN millimole/m3) + 0

  • Merging Principles:
  • Merging Type (exclusiveuseoffirstavailablevalue, averageover all availablevalues)
  • Order ofinput variables matters (in caseofeclusivemerge)
  • Standard or user-specifiedconversion formulas
  • Quality flag inheritence