EO·Atlas
SAR backscatter - change detection
Detects land-cover or structural change by comparing backscatter intensity across dates; good for flood mapping, deforestation alerts, and disaster damage assessment.
Single- or dual-pol intensity ratio or log-difference between acquisitions. Cloud-independent; operates day and night. The primary method for rapid flood extent mapping -- InSAR coherence is a complement, not a replacement. Wikipedia: Synthetic-aperture radar
- Copernicus EMS On Demand Mapping
- COSMIC-EYE Area Monitoring
- COSMIC-EYE Infrastructure Monitoring
- COSI (Corea SAR Instrument)
via KOMPSAT-5
COSI supports HR/ST/WS SAR imaging modes suitable for change detection.
- StriX SAR
via Synspective StriX
StriX modes and constellation design support repeated SAR observations for change detection.
- SARah active phased-array SAR
via SARah
Active phased-array SAR supports repeat radar imaging and change-detection workflows.
- SAR-C (EOS-04)
via EOS-04
EOS-04 SAR-C supports all-weather radar imaging applications including flood mapping.
- TerraSAR-X SAR
via TerraSAR-X
TerraSAR-X repeat acquisitions support SAR backscatter change detection.
- SAR-X (RISAT-2 series)
via RISAT-2BR1
X-band quad-pol SAR; multi-temporal backscatter change detection demonstrated for flood and land-cover monitoring
- RoadEO road quality monitoring and prediction
RoadEO satellite EO component includes SAR backscatter change detection for road surface condition tracking over time, consistent with radar remote sensing specialist role and multi-temporal SAR analysis for infrastructure monitoring.
- Terraprisma ESG Monitoring and Compliance
- Terraprisma Satellite-Based Exploration Intelligence
- OpenAtlas RECON
- MetaSAR-C
C-band multi-temporal backscatter change detection
- MetaSAR-L
L-band multi-temporal backscatter change detection for soil moisture and vegetation state
- CSG-SAR
X-band SAR backscatter imagery supports repeat-pass change workflows where acquisitions are available.
Flags surface change by testing each new optical observation against a per-pixel statistical baseline built from the historical time-series, accumulating evidence across dates before confirming a change. Underlies near-real-time deforestation and disturbance alert systems.
Detects fine-scale surface disturbance by measuring the loss of interferometric phase coherence between two SAR acquisitions, sensitive to changes too subtle to alter backscatter amplitude. Used for damage assessment and disturbed-ground mapping.
Maps the extent and timing of fire-affected area by tracking persistent post-fire changes in surface reflectance across a time-series, often anchored by coincident active-fire detections. Produces systematic burned-area records.
- [1]Wikipedia: Synthetic-aperture radarcommunity2026-05-22
Edited from public sources. Last reviewed date pending by SpectraWorks editorial. See the data dictionary for field definitions.