General Information

This visualization presents average coherence data derived from Sentinel-1 differential interferograms. The data represents coherence values across multiple measurement series (CC_M1 through CC_M6) and reference series (dashed areas). The reference series are averaged to determine snow conditions, which may affect the reliability of coherence measurements.
Note that the dates of the data points show the midpoint of the two scenes used for the interferogram calculation. E.g. The pair 20251214_20251220 is plotted as 'Dec 17, 2025'.
Snow Detection: The system automatically identifies snow-covered scenes by analyzing the average of reference coherence values. Values below 0.5329 indicate snow presence (displayed in light grey), values between 0.5329 and 0.6914 indicate partial snow coverage (displayed with 50% transparency), and values above 0.6914 indicate snow-free conditions (displayed in normal color).
Potential Events: The "Show Potential Events" feature highlights measurements that fall below expected coherence thresholds in snow-free or partially snow-covered conditions. Critical events (coherence < 0.69) are marked with a solid red outline, while warning-level events (coherence between 0.69 and 0.72) are marked with a semi-transparent red outline. Events occurring during snow-covered periods are not highlighted, as snow naturally reduces coherence values.
Data Interpretation: Users should exercise caution when interpreting coherence data, particularly during transitional periods or when snow conditions are uncertain.
Processed Copernicus Sentinel-1 data are shown.