ALH
Airborne LiDAR Hydrography
Principle of SHOALS
Green laser pulses (532 nm) reflected , from bottom Near-IR (1064 nm) laser pulses reflected from water surface
Airborne LiDAR Bathymetry (ALB) or Airborne LiDAR Hydrography (ALH) systems are most effective for the applications where use of traditional sonar methods are limited or impossible such as:
-
Shoal water
-
Internal water basins
-
Disaster areas
-
Quick ecological inspections
 |
|
| Airborne system is immune to grounding hazards, shoal-infested waters, rocks, reefs, hidden subsurface objects or tidal flows. |
The SHOALS data can also be merged with other types of data such as aerial images |
SURVEY MODES AND PRODUCTIVITY
|
Altitude (m) |
Swath (m) |
LateralSpot Spacing (m) |
Forward Spot Spacing (m) |
Flight Speed (Knots) |
Scanner Cycle Rate (Hz) |
Area Coverage (nm2/hr) |
|
400 |
60 |
2 |
2 |
124 |
16.0 |
4.0 |
|
300 |
60 |
2 |
2 |
124 |
15.9 |
4.0 |
|
400 |
130 |
3 |
3 |
127 |
10.9 |
8.9 |
|
300 |
125 |
3 |
3 |
128 |
11.0 |
8.7 |
|
400 |
215 |
4 |
4 |
126 |
8.1 |
14.7 |
|
300 |
165 |
4 |
4 |
162 |
10.5 |
14.5 |
|
400 |
230 |
5 |
5 |
180 |
9.2 |
22.4 |
|
|
 |
|
|
Owing to their high-density coverage, SHOALS accurately target objects as small as 2 x 2 m, and locate and map shipwrecks. |
Representation of the sea bottom survey results in the form of laser points cloud |
