xsar
radarSat2 Level 1 python reader for efficient xarray/dask based processor
Install
conda install -c conda-forge xradarsat2
>>> import xradarsat2
>>> folder_path = "/level1/root/directory"
>>> xradarsat2.rs2_reader(folder_path)
DataTree('None', parent=None)
├── DataTree('orbitAndAttitude')
│ Dimensions: (timeStamp: 7)
│ Coordinates:
│ * timeStamp (timeStamp) datetime64[ns] 2010-10-15T21:01:32.370461 ... 2010...
│ Data variables:
│ yaw (timeStamp) float64 3.756 3.773 3.785 3.792 3.807 3.82 3.83
│ roll (timeStamp) float64 -29.8 -29.8 -29.8 -29.8 -29.8 -29.8 -29.8
│ pitch (timeStamp) float64 0.002605 0.002862 ... -0.001594 -0.001443
│ xPosition (timeStamp) float64 -5.072e+06 -5.076e+06 ... -5.087e+06
│ yPosition (timeStamp) float64 4.643e+06 4.676e+06 ... 4.799e+06 4.828e+06
│ zPosition (timeStamp) float64 2.033e+06 1.944e+06 ... 1.584e+06 1.494e+06
│ xVelocity (timeStamp) float64 -425.7 -352.1 -278.6 ... -131.8 -58.51 14.65
│ yVelocity (timeStamp) float64 2.642e+03 2.58e+03 ... 2.324e+03 2.259e+03
│ zVelocity (timeStamp) float64 -7.063e+03 -7.09e+03 ... -7.207e+03
│ Attributes:
│ attitudeDataSource: Downlink
│ attitudeOffsetsApplied: true
│ Description: Attitude Information Data Store. Orbit Informati...
├── DataTree('geolocationGrid')
│ Dimensions: (line: 11, pixel: 11)
│ Coordinates:
│ * line (line) int64 0 1007 2015 3023 4031 5039 6046 7054 8062 9070 10078
│ * pixel (pixel) int64 0 1043 2086 3129 4172 ... 6258 7301 8344 9387 10431
│ Data variables:
│ latitude (line, pixel) float64 17.97 17.89 17.8 ... 12.77 12.67 12.57
│ longitude (line, pixel) float64 130.4 130.9 131.4 ... 133.3 133.8 134.3
│ height (line, pixel) float64 0.0 0.0 0.0 0.0 0.0 ... 0.0 0.0 0.0 0.0 0.0
│ Attributes: (12/13)
│ productFormat: GeoTIFF
│ outputMediaInterleaving: BSQ
│ rasterAttributes_dataType: Magnitude Detected
│ rasterAttributes_bitsPerSample_dataStream: Magnitude
│ rasterAttributes_bitsPerSample_value: 16
│ rasterAttributes_numberOfSamplesPerLine: 10432
│ ... ...
│ rasterAttributes_sampledPixelSpacing_units: m
│ rasterAttributes_sampledPixelSpacing_value: 50.0
│ rasterAttributes_sampledLineSpacing_units: m
│ rasterAttributes_sampledLineSpacing_value: 50.0
│ rasterAttributes_lineTimeOrdering: Increasing
│ rasterAttributes_pixelTimeOrdering: Decreasing
├── DataTree('imageGenerationParameters')
│ ├── DataTree('doppler')
│ │ ├── DataTree('dopplerCentroid')
│ │ │ Dimensions: (timeOfDopplerCentroidEstimate: 5,
│ │ │ n-Coefficients: 5)
│ │ │ Coordinates:
│ │ │ * timeOfDopplerCentroidEstimate (timeOfDopplerCentroidEstimate) datetime64[ns] ...
│ │ │ * n-Coefficients (n-Coefficients) int64 0 1 2 3 4
│ │ │ Data variables:
│ │ │ dopplerAmbiguity (timeOfDopplerCentroidEstimate) int64 0 ...
│ │ │ dopplerAmbiguityConfidence (timeOfDopplerCentroidEstimate) float64 ...
│ │ │ dopplerCentroidReferenceTime (timeOfDopplerCentroidEstimate) float64 ...
│ │ │ dopplerCentroidPolynomialPeriod (timeOfDopplerCentroidEstimate) float64 ...
│ │ │ dopplerCentroidCoefficients (timeOfDopplerCentroidEstimate, n-Coefficients) float64 ...
│ │ │ dopplerCentroidConfidence (timeOfDopplerCentroidEstimate) float64 ...
│ │ │ Attributes:
│ │ │ Description: Doppler Centroid Data Store
│ │ └── DataTree('dopplerRateValues')
│ │ Dimensions: (dopplerRateReferenceTime: 1,
│ │ n-RateValuesCoefficients: 3)
│ │ Coordinates:
│ │ * dopplerRateReferenceTime (dopplerRateReferenceTime) float64 0.005568
│ │ * n-RateValuesCoefficients (n-RateValuesCoefficients) int64 0 1 2
│ │ Data variables:
│ │ dopplerRateValues (dopplerRateReferenceTime, n-RateValuesCoefficients) float64 ...
│ │ Attributes:
│ │ Description: Doppler Rate Values Data Store.
│ └── DataTree('chirp')
│ Dimensions: (pole: 1, n-amplitudeCoefficients: 4,
│ n-phaseCoefficients: 4)
│ Coordinates:
│ * pole (pole) <U2 'VV'
│ * n-amplitudeCoefficients (n-amplitudeCoefficients) int64 0 1 2 3
│ * n-phaseCoefficients (n-phaseCoefficients) int64 0 1 2 3
│ Data variables:
│ replicaQualityValid (pole) <U4 'true'
│ crossCorrelationWidth (pole) float64 1.033
│ sideLobeLevel (pole) float64 -13.28
│ integratedSideLobeRatio (pole) float64 -9.988
│ crossCorrelationPeakLoc (pole) float64 38.2
│ chirpPower (pole) float64 63.78
│ amplitudeCoefficients (pole, n-amplitudeCoefficients) float64 1.0 ... ...
│ phaseCoefficients (pole, n-phaseCoefficients) float64 0.3395 ... -...
│ Attributes:
│ VV_wing: Combined
│ VV_pulse: 11.58
│ Description: Chirp Quality Data Store
├── DataTree('radarParameters')
│ Dimensions: (beam: 4, pole: 1, NbOfNoiseLevelValues: 99)
│ Coordinates:
│ * beam (beam) <U3 'W1' 'W2' 'W30' 'S7'
│ * pole (pole) <U2 'VV'
│ Dimensions without coordinates: NbOfNoiseLevelValues
│ Data variables:
│ pulsesReceivedPerDwell (beam) int64 58 58 58 58
│ numberOfPulseIntervalsPerDwell (beam) int64 65 66 65 67
│ rank (beam) int64 7 8 7 9
│ settableGain (beam, pole) float64 -1.0 -1.0 -1.0 -1.0
│ pulseRepetitionFrequency (beam) float64 1.283e+03 ... 1.297e+03
│ samplesPerEchoLine (beam) int64 6768 7920 7944 7320
│ noiseLevelValues_BetaNought (NbOfNoiseLevelValues) float64 -27.16 ......
│ noiseLevelValues_SigmaNought (NbOfNoiseLevelValues) float64 -28.36 ......
│ noiseLevelValues_Gamma (NbOfNoiseLevelValues) float64 -26.5 ... ...
│ Attributes: (12/20)
│ acquisitionType: ScanSAR Wide
│ beams: ['W1', 'W2', 'W30', 'S7']
│ polarizations: ['VV']
│ pulses: 11.58
│ radarCenterFrequency_units: Hz
│ radarCenterFrequency: 5404999242.769673
│ ... ...
│ adcSamplingRate_units: Hz
│ adcSamplingRate: 12667968.75
│ yawSteeringFlag: YawSteeringOn
│ geodeticFlag: Off-Geocentric
│ rawBitsPerSample: 4
│ Description: Radar Parameters Data Store. Information des...
└── DataTree('lut')
Dimensions: (pixels: 10432)
Coordinates:
* pixels (pixels) int64 0 1 2 3 4 5 ... 10426 10427 10428 10429 10430 10431
Data variables:
lutBeta (pixels) float64 1.358e+07 1.358e+07 ... 1.358e+07 1.358e+07
lutGamma (pixels) float64 1.164e+07 1.164e+07 ... 3.814e+07 3.815e+07
lutSigma (pixels) float64 1.789e+07 1.789e+07 ... 4.049e+07 4.05e+07
Attributes:
Description: RADARSAT Product LUT. (c) COPYRIGHT MacDonald Dettwiler and...
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