ICEYE
ICEYE GRD acquisitions are calibrated using SNAP, the open source common architecture for ESA Toolboxes ideal for the exploitation of Earth Observation data.
The ICEYE calibration SNAP graph is depicted below:
graph TD;
A[Read] --> B[Calibration];
B --> C[Speckle-Filter];
C --> D[LinearToFromdB];
D --> E[Terrain-Correction];
E --> F[Write];
The SNAP graph relevant parameters are listed in the table below:
Operator | Parameter | Value |
Calibration | outputSigmaBand | true |
Speckle-Filter | filter | Lee Sigma |
filterSizeX | 3 | |
filterSizeY | 3 | |
dampingFactor | 2 | |
estimateENL | true | |
enl | 1.0 | |
numLooksStr | 1 | |
windowSize | 5x5 | |
targetWindowSizeStr | 3x3 | |
sigmaStr | 0.9 | |
anSize | 50 | |
Terrain-Correction | pixelSpacingInMeter | Read from metadata |
demName | SRTM 1Sec HGT | |
mapProjection | AUTO:42001 |
Input
The input is an ingested ICEYE, see details here.
Output
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