analysis · methodologies

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

Sources

[1]Wikipedia: Synthetic-aperture radarcommunity2026-05-22

Cite https://eo-atlas.org/methodologies/sar-backscatter-change-detection Markdown twin → Field definitions →