List of Outputs

Correction of the InSAR Velocity Field produces a complete set of outputs that document each step of the referencing and adjustment process. These outputs are designed for quality control, visualization, and traceability of the corrections applied.

Below is the detailed list of outputs generated by RRINGG.

1. Map of All Found Stations

  • Format: PNG

  • Description: Map showing the geographic distribution of all GNSS stations detected in the input dataset. Station colors represent their raw velocity values.

  • Example File: RRINGG_EPOS_STATIONS_MAP.png

  • Illustration:

    Station distribution map

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2. Map of Valid Stations

  • Format: PNG

  • Description: Subset of GNSS stations intersecting with the InSAR velocity raster. The color scale reflects the number of valid temporal positions per station.

  • Example File: RRINGG_EPOS_VALID_STATION_MAP.png

  • Illustration:

    Map of Valid Stations

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3. Station Influence Map (Voronoi Diagram)

  • Format: PNG

  • Description: Voronoi diagram showing the spatial influence area of each GNSS station. Each polygon corresponds to the region closest to a specific station.

  • Example File: RRINGG_EPOS_SPATIAL_DISTRIBUTION.png

  • Illustration:

    Station Influence Map

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4. Map of Stations Used for Adjustment

  • Format: PNG

  • Description: Map of GNSS stations selected for the velocity-field adjustment. Station colors indicate the velocity difference between InSAR and GNSS (\(\text{InSAR} - \text{GNSS}\), in mm/year).

  • Example File: RRINGG_EPOS_SPATIAL_COVERAGE_AFTER_FITTING.png

  • Illustration:

    Map of Stations Used for Adjustment

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5. Scatter Plot Before Fitting

  • Format: PNG

  • Description: Scatter plot comparing GNSS velocities (x-axis) and raw InSAR velocities (y-axis). Serves as baseline comparison before correction.

  • Interpretation: - Points far from the 1:1 line indicate biases in the raw InSAR velocity field.

  • Example File: RRINGG_EPOS_SCATTER_PLOT_BEFORE_FITTING.png

  • Illustration:

    Scatter Plot Before Fitting

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6. Scatter Plot After Fitting

  • Format: PNG

  • Description: Scatter plot comparing GNSS velocities (x-axis) to corrected InSAR velocities (y-axis). Demonstrates the improvement achieved through adjustment.

  • Interpretation: - Points should align closely to the 1:1 line, showing successful referencing.

  • Example File: RRINGG_EPOS_SCATTER_PLOT_AFTER_FITTING.png

  • Illustration:

    Scatter Plot After Fitting

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7. Corrected InSAR Velocity Field

  • Format: GeoTIFF

  • Description: The primary output: corrected InSAR velocity raster, expressed in mm/year, referenced to GNSS observations. Ensures alignment with global geodetic standards and removes systematic biases.

  • Illustration: Before/after comparison:

    Velocity Field Before and After Correction

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8. Updated Metadata File

  • Format: JSON

  • Description: Metadata file documenting all relevant processing details, ensuring transparency. It includes: - Station Information (IDs, positions, velocities) - Adjustment Metrics (residuals, RMS error) - Plane Parameters (\(a\), \(b\), \(c\) with uncertainties) - Processing Parameters (station thresholds, options used)

  • Example File: RRINGG_CNES_MV-LOS_geo_16rlks.meta

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Summary Table of Outputs

RRINGG Outputs

Output

Format

Purpose

Map of All Found Stations

PNG

Visualize raw GNSS station distribution

Map of Valid Stations

PNG

Identify stations overlapping with InSAR raster

Station Influence Map

PNG

Spatial Voronoi partitioning of GNSS coverage

Stations Used for Adjustment

PNG

Subset used in fitting, with velocity differences

Scatter Plot (Before Fitting)

PNG

Baseline GNSS vs. InSAR comparison

Scatter Plot (After Fitting)

PNG

Validate correction effectiveness

Corrected InSAR Velocity Field

GeoTIFF

Main geospatial output, corrected raster

Updated Metadata File

JSON

Traceability and processing details