Airborne LIDAR Hydrography uses which type of laser pulse to capture data from the water surface?

The use of green laser pulses in Airborne LIDAR Hydrography is essential due to their specific properties that enhance underwater penetration. Water absorbs light at longer wavelengths (like red and near-infrared), meaning those lasers are less effective for capturing data from beneath the water surface. In contrast, green wavelengths are less absorbed by water and can reach greater depths, allowing for accurate measurements of underwater depth and topography.

By utilizing green laser pulses, LIDAR systems can effectively measure the distance from the aircraft to the water surface and then to the underwater features. This capability is crucial for tasks such as mapping seafloor topography, assessing habitat conditions, and conducting resource management. The ability to penetrate the water surface means that surveys can provide detailed information that is invaluable for marine and coastal studies.