Observation Technique
Using microwave signals to map the surface of the earth allows for the continuous tracking of forest health through any weather conditions. Satellite radar monitoring is used by timber sourcing organisations to detect the removal of trees in areas that are difficult to reach or frequently covered by clouds.
Detection Capability
The system works by sending a pulse of energy to the ground and measuring the signal that bounces back to the sensor. Different types of land cover, such as dense forest or cleared land, return the signal in different ways, allowing the system to detect changes in biomass. This technology is particularly effective at identifying illegal logging roads and small-scale clearing that might be missed by other methods.
Because the radar provides its own source of energy, it can capture images at night and through thick smoke or haze. It provides a reliable way to verify that a supplier is not harvesting wood from protected areas or high-conservation forests.
Monitoring Boundary
Identification of changes in the structure of the forest does not necessarily reveal the specific species of trees or the legal status of the land. It provides the evidence needed to trigger ground-based inspections and the review of harvesting permits.