Meris Case-2 Regional Processor Description | ![]() |
Please note: The chapter Data Processors - Introduction provides a general description for all BEAM data processors. It describes the common graphical user interface (GUI), the command-line interface and the common processing request file format.
In the text field you can edit and adjust the processing parameters for the current run of the processor.
This file uses a Java property file syntax. It is
composed of lines which are key-value pairs in the form
<key> = <value>
Lines with a preceding # are comment-lines and will not be
interpreted.
If a given key is not known by the processor it will be ignored.
When a parameter file does not contain a parameter of the processor, this
parameter will be set to its default value.
Number | Parameter | Default Value | Description |
---|---|---|---|
1 | waterNnInverseFilePath waterNnForwardFilePath atmCorrNnFilePath polCorrNnFilePath |
./water_net_20020807/60x20x5_639.4.net ./water_net_20020807/15x20_144.8.net 10x20_155.2.net 18_518.1.netPolEffekt |
Paths and names of the neural network files: a relative path is assumed to be relative to ${BEAM-HOME}\auxdata\merisc2r. |
2 | inputValidMask | not l1_flags.INVALID and not l1_flags.SUSPECT and not l1_flags.LAND_OCEAN and not l1_flags.BRIGHT and not l1_flags.COASTLINE | An arithmetic expression which defines the valid pixels for the processing. Pixels which are not valid are skipped by the processor. |
3 | performSmileCorrection | false | Switch the smile correction on and off. |
4 |
outputAPig outputAGelb outputBTsm outputATotal |
true true true |
Select which of the IOP products shall be included in the output file.
All are given for MERIS band 2 (443 nm). outpuAPig := absorption coefficient of phytoplankton pigments outputAGelb := absorption coefficient of yellow substance and of all particles after bleaching outputBTsm := scattering coefficient of all particles outputATotal := total absorption of water constituance |
5 |
outputKmin outputZ90max |
true true |
Select which of the transparency variables shall be included in the output file. outputKmin := downwelling irradiance atenuation coefficient outputZ90max := inverted value of Kmin |
6 |
outputChlConc outputTsmConc |
true true |
Select which of the concentrations shall be included in the output file. outputChlConc := chlorophyll concentration (mg m-3) outputTsmConc := total suspended matter dry weight (g m-3) |
7 |
outputAngstrom outputTau |
true true |
Controls the output of the angstrom coefficient (ang_620_681) and the spectral aerosol optical depth (tau_681). |
8 | outputOutOfScopeChiSquare | true | Controls the Output of the chi2 value, i.e. the squared difference between measured and simulated water leaving radiance reflectances, shall be included in the product. A low value in the product indicates a higher success in the retrieval and that the conditions, which have led to the measured spectrum, are in (sufficient) agreement with the conditions and the bio-optical model used in the simulations for training the neural network. A value above a threshold of presently 4.0 triggers the out of training range == out of scope flag. |
9 |
performChiSquareFit outputFitAPig outputFitBTsm outputFitTsmConc outputFitChlConc outputFitAGelb outputChiSquareFit outputNIter |
false true true true true true true true |
Perform the optimization fitting algorithm, this has to be set true if the concentrations shall be computed alternatively or in addition using the optimization procedure. However, this procedure requires more computation time, but the results are normally improved. |
10 |
useInvNN nIterMax nu tau eps1 eps2 |
false 30 2.0 0.05 0.01 0.0003 |
Parameters used to control the optimization. Please leave them unchanged presently. |
11 | performPolCorr | true | Controls if the polarisation correction should be included in the atmospheric correction procedure. This part is presently very experimental and has not been verified so far. |
12 |
tsmConversionFactor tsmConversionExponent |
1.73 1.0 |
Factors for converting particle scattering into total suspended matter dry weight. Ctsm (g m-3) = tsmConversionFactor * b443^tsmConversionExponent |
13 |
chlConversionFactor chlConversionExponent |
21.0 1.04 |
Factors for converting absorption of phytoplankton pigment at 443 into chlorophyll
concentration. Chlorophyll (mg m-3) = chlConversionFactor a_pig443^chlConversionExponent |
14 |
maxWaterToaRadRefl14 maxLandToaRadRefl14 |
0.02 0.2 |
The maximum toa radiance reflectance for water and land pixels. |
15 | spectrumOutOfScopeThreshold | 4.0 | The out of scope (= out of training range) flag will be set if the chi2 value is above the given threshold. |
16 |
outputPathRadianceReflAll outputPathRadianceRefl.[1 - 9] |
false true |
outputPathRadianceReflAll sets the default value for all values of the
outputPathRadianceRefl. outputPathRadianceRefl.# defines (separately for each band) if path radiance reflectance shall be included in output product. |
17 | switchToIrradianceReflectance | false | Controls if the water leaving reflectances shall be written out as irradiance reflectances. |
18 |
outputWaterLeavingReflAll outputWaterLeavingRefl.[1 - 9] |
false true |
outputWaterLeavingReflAll sets the default value for all values of
outputWaterLeavingRefl. outputWaterLeavingRefl.# defines (separately for each band) if path radiance reflectance shall be included in output product. |
19 |
outputTransmittanceAll outputTransmittance.[1 - 9] |
false true |
outputTransmittanceAll sets the default value for all values of
outputTransmittance. outputTransmittance.# defines (separately for each band) if path radiance reflectance shall be included in output product. |
20 | outputToaReflAll outputToaRefl.[1 - 10,12,13] outputToaRefl.[11,14,15] |
false true false |
outputToaReflAll sets the default value for all values of
outputToaRefl. outputToaRefl.# defines (separately for each band) if path radiance reflectance shall be included in output product. |
21 | outputTosaReflAll outputTosaRefl.[1 - 15] |
false false |
outputTosaReflAll sets the default value for all values of
outputTosaRefl. outputTosaRefl.# defines (separately for each band) if path radiance reflectance shall be included in output product. |
The following table describes the Meris Case-2 Regional processor specific processing request file contents. For a detailed description of the processing request file concept and file specification please look at chapter Data Processors - Introduction.
Parameter name | Description | Type | Valueset |
---|---|---|---|
type | Request type. Mandatory attribute of the Request element |
String | "MERISC2R" |
property_file | Path or URL to the parameter file | String |