Satellite Subsurface Void Detection
Budget: $250 – $400 USD
I have a 500 sqm target site in Libya (32.346717 N, 20.669362 E) that needs a thorough remote-sensing assessment. The main goal is to confirm or rule out subsurface voids or chambers down to roughly 30 m using InSAR, then cross-check those findings with complementary multispectral analysis for any supporting surface or mineral indications.
You will need to source the appropriate InSAR stacks yourself—Sentinel-1 or another radar mission with suitable temporal coverage is fine as long as the interferograms are clean enough for millimetric deformation detection. Once processed, fuse the displacement results with multispectral imagery to highlight any coincident spectral or thermal anomalies that could strengthen the case for underground cavities.
Deliverables
• A concise methodology section outlining preprocessing, coherence thresholds, phase unwrapping, and any terrain correction applied.
• High-resolution JPEG maps (UTM projected) clearly marking every detected anomaly, overlaid with precise GPS coordinates.
• A PDF technical report that explains interpretation logic, provides depth estimates, and flags any data limitations or false-positive risks.
• A shapefile or GeoJSON of anomaly footprints so I can import them directly into QGIS.
Acceptance Criteria
Results must resolve deformation signals or signatures consistent with cavities at the requested depth range and tie those signals to specific coordinates inside the 500 sqm boundary. Maps should be sharp at 300 dpi and all spatial layers must align within ±2 m of ground truth.
I’ll be on hand to answer location-specific questions and to validate interim findings; please outline your proposed workflow and timeline when you respond.
You will need to source the appropriate InSAR stacks yourself—Sentinel-1 or another radar mission with suitable temporal coverage is fine as long as the interferograms are clean enough for millimetric deformation detection. Once processed, fuse the displacement results with multispectral imagery to highlight any coincident spectral or thermal anomalies that could strengthen the case for underground cavities.
Deliverables
• A concise methodology section outlining preprocessing, coherence thresholds, phase unwrapping, and any terrain correction applied.
• High-resolution JPEG maps (UTM projected) clearly marking every detected anomaly, overlaid with precise GPS coordinates.
• A PDF technical report that explains interpretation logic, provides depth estimates, and flags any data limitations or false-positive risks.
• A shapefile or GeoJSON of anomaly footprints so I can import them directly into QGIS.
Acceptance Criteria
Results must resolve deformation signals or signatures consistent with cavities at the requested depth range and tie those signals to specific coordinates inside the 500 sqm boundary. Maps should be sharp at 300 dpi and all spatial layers must align within ±2 m of ground truth.
I’ll be on hand to answer location-specific questions and to validate interim findings; please outline your proposed workflow and timeline when you respond.