InSAR subsidence monitoring

InSAR can reveal deformation patterns over time and direct inspections toward areas with persistent signals. We design analyses for infrastructure, mining, energy and risk-management teams, beginning with an operational question and explicit interpretation limits. The product complements instruments, surveying, geotechnics and fieldwork; it cannot independently diagnose a cause or guarantee that every movement will be detected.

Test feasibility before promising results

We review the area, period, expected velocity, movement orientation, land cover, vegetation, relief and available imagery. Coherence may be limited where surfaces change rapidly or include water and dense vegetation. Satellite geometry measures displacement in the sensor's line of sight, not a complete three-dimensional vector. A preliminary test documents these conditions so the team can decide whether InSAR can answer its question and with what uncertainty.

Reference and quality controls also matter. A time series may show apparent trends caused by atmosphere, processing, a changing reference or coherence loss. We evaluate spatial stability, noise, persistent targets, discontinuities and consistency between acquisition directions when available. A signal is not labelled as mining subsidence, structural failure or a landslide until it is compared with contextual and independent evidence.

Turn pixels into inspection decisions

Deliverables may include a scene inventory, reproducible method, quality map, time series, attention zones, anomaly register and verification recommendations. Each finding can be related to an asset, segment or operational area so a team can assign a visit and record the outcome. Alerts declare threshold, persistence and confidence instead of relying on unexplained categorical colours.

The architecture can ingest later observations while preserving previous versions. If a methodology change alters the series, that break is documented rather than blending incompatible results. Derived-data licences are reviewed before redistribution or public release.

Inputs for a pilot

Scoping requires an area of interest, expected phenomenon, dates, critical assets, existing measurements and the decision the analysis must support. A representative pilot is preferable before scaling coverage. The proposal separates acquisition, processing, interpretation, integration and field visits, with criteria such as useful coverage, coherence, repeatability and inspection value. If conditions do not support InSAR, the assessment should say so early and recommend a better-suited technique.