Uploaded March 2023 | Updated September 2026, 3 weeks ago
Long-distance laser tests over water are often treated as simple curvature measurements, but the laser beam itself is affected by atmospheric refraction and its height above the water may be poorly constrained. This video compares laser observations with an optical auto-level method that establishes a local horizontal and directly measures vertical offset.
Long-distance laser tests over water are often treated as simple curvature measurements, but the laser beam itself is affected by atmospheric refraction and its height above the water may be poorly constrained. This video compares laser observations with an optical auto-level method that establishes a local horizontal and directly measures vertical offset.
