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Sentinel-1 GRD

Sentinel-1 GRD acquisitions are calibrated using SNAP, the open source common architecture for ESA Toolboxes ideal for the exploitation of Earth Observation data.

The Sentinel-1 GRD calibration SNAP graph is deplicted below:

graph TD A[Read] --> B[Apply-Orbit-File] B --> C[Remove-GRD-Border-Noise] C --> D[Calibration] D --> E[LinearToFromdB] E --> F[Terrain-Correction] F --> G[Write]

The SNAP graph relevant parameters are listed in the table below:

Operator Parameter Value
Remove-GRD-Border-Noise borderLimit 2000
trimThreshold 0.2
Calibration outputSigmaBand true
Terrain-Correction pixelSpacingInMeter Read from metadata
demName SRTM 1Sec HGT
mapProjection AUTO:42001
pixelSpacingInMeter 20.0


The input is an ingested ICEYE, see details here.


The output is a STAC item geojson ... including the assets ...

Reference documents

RD01 ICEYE-SAR-Product-Guide, ICEYE, Version 3.0, issued: 01.05.2020