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Single-Photon LiDAR and Where It Fits in Airborne Mapping
Single-photon LiDAR collects far more data per flight hour than linear mode, at the cost of precision and noise. Here is how it works and how far adoption has gone.
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Mapping Wildfire Ladder Fuels With LiDAR
A study of 42 California wildfires found that the vegetation in the lowest ten meters of a forest predicted fire severity better than biomass or canopy height. This article explains what ladder fuels are, why they are hard to see, and how LiDAR measures them.
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How GNSS Jamming and Spoofing Affect Aerial Surveys
Intentional satellite signal interference has already spoiled part of a national aerial survey season in Finland. This article explains jamming and spoofing, how to read the GPSJam map, what operators can do, and what ground stations and nationwide reference networks can and cannot add.
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How Vegetation Shapes LiDAR Ground Returns
A survey can meet its point density and still produce a poor terrain model under vegetation. This article explains how a pulse finds the ground, why low undergrowth is harder than tall trees, and which survey choices change ground coverage.