| Brand |
ATLAS HYDROGRAPHIC |
| Product Name |
ATLAS FANSWEEP 20-200 |
| Date of first release |
1996 (first generation) |
| Hull/ Bow/ Side/ ROV/AUV Mounted, towed |
Hull/ Bow/ Side/ Portable (via rig) |
| Retractable Y/N |
Y |
| Diameter, height (cm) |
V-shaped dual-head transducer (dimensions of one transducer array): 26.0 x 33.3 x 5.8 per module |
| Weight, without cable, per module (kg) |
10 |
| Power requirements |
1.6 kW |
| Type of system |
Multibeam Echosounder with Side Scan Capability |
| Bottom Detection Method |
Hybrid: Based on principles of beamforming and measurements of phase differences |
| Frequency Range |
200 kHz |
| Depth Range, depth resolution |
0.5 to 300 m |
| Max. Slant Range |
600 m max coverage absolute |
| Max. Swath (function of depth) |
12x |
| Samples per sweep, samples per second |
1440,
> 20000 (up to 16 Hz ping rate) |
| Beam width (acrossx along track [deg]) |
1.5° down to <0.2° x 1.3° |
| Directly under sensor (m) |
0.2 x 0.2 @ 10 m depth
1.1 x 0.5 @ 50 m depth
3.4 x 0.8 @ 150 m depth
(along x across) |
| At max. horizontal range (m) |
0.7 x 0.2 @ 10 m depth
3.6 x 0.5 @ 50 m depth
10.8 x 0.8 @ 150 m depth
(along x across) |
| Smallest identifiable cube (m3) |
< 0.5 x 0.5 x 0.5 |
| Max swath |
600 m max coverage absolute |
| Are footprints equally spaced? |
yes |
| Does the system have side scan possibilities? |
Yes |
| Number of SSS-points per sweep |
4,096 amplitude values per sweep |
| Calculated statistical system accuracy (cm RMS) |
± (0.05 m + 0.2% of depth) |
| System Accuracy in relation to IHO S44-4, meets S44 order |
Yes, typical IHO special order compliance up to 6-times water depth |
| Max. allowable survey speed to allow for this accuracy (knots) |
16 |
| System applies ray bending corrections in real time |
Yes |
| System is capable of collecting and integrating the SV-profile in real time during data collection |
Yes |
| If yes, explain the process |
Continously reading of sound velocity at keel and sound velocity profile from available sound velocity sensors |
| Motion sensors compatible to the system |
All standard |
| Dynamic accuracy required from MRU (degrees) |
Pitch / Roll: 0.05° or better
Heave: 5% of water depth or 5 cm
Heading: 0.01° or better |
| Possible interfaces to the processing unit |
via LAN |
| Mean time before failure (hrs) |
10000 |
| Mean time to repair (hrs) |
0.5 |
| Online access to bathymetric data during collection |
Yes |
| If yes, by which means? |
Network telegram |
| Additional remarks |
The ATLAS FANSWEEP 20 is a multibeam echosounder that combines the advantages of beamforming and interferometric phase measurement techniques to the benefit of a large coverage together with high accurate depth measurements. |
| Units sold |
> 100 |
