Airborne Hydrography

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HawkEye II - Technical specifications

Function Capability Comments
Bathymetric soundings per second Nominal 4000
Full waveform range capture
Hydrographic and topographic soundings are simultaneous
Topographic soundings per second Nominal 64 000
Up to 3 range captures/sounding
Hydrographic and topographic soundings are simultaneous
Digital camera 1600 x 1200 pixel, one image per second Optional: 16 MPixel camera
Altitude Nominal 250 to 500 m Optimized to survey requirements
Swath width Nominal 100 to 330 meters Optimized to survey requirements
Flight deviation compensation Roll ± 5 degrees
Pitch ± 7 degrees
Yaw ± 20 degrees
Speed ± 10 %
Altitude ± 10 %
Side slip ± 5 %
Compensations are created by two axes servo controlled scanner mirror.
References are based on the position navigation system
Position orientation system Applanix 410 Optional: Other POS nav systems are available on request.
Scanner pattern Evenly distribution over survey area (except at swath limits) Generated by 2 axes servo controlled scanner mirror
Sounding density Hydrographic data Typical 1,7 x 1,7 to 3,5 x 3,5 m
Optionally others can be supplied
Optimized to survey requirements
Sounding density topographic data Typical 4 points per square meter to 1 point per square meter Hydrographic and topographic data are joint seamless
Hydrographic accuracy IHO order 1 or better, Nominal
Horizontally x/y = ± 2,5 m
Vertically z = ± 0,25 m
Dependent of survey parameters (optimization to survey requirements)
Sea floor objects det. IHO Order 1 or better See above
Depth range Nominal 3 x secchi depth
North sea 35-40 m
France 25-30 m
Caribbean islands: 50 m
Dependent on water turbidity and sea bed reflectance. Theoretical limit 70 m
Minimum depth 0,3 m Hydrographic and topographic data are joint seamless
Topographic accuracy Horizontally X/Y = ± 0,5 m
vertically Z = ± 0,15 m
 
Total system weight < 190 Kg Including AC installation kit
System power Consumption. < 50 Amp on 28 V power supply  
Data storage > 4 hours Rugged portable hard disks
Man-machine interface Real time presentation of Depths, Altitudes, Covered areas. System settings and mission planning can be optimized during flight
Post processing Toolbox delivered with system  

Note: to meet its stated accuracy, the Hawk Eye II must receive GPS data of sufficient quality.
The specification is subject to change without notice.




Flight cases

Flight case Altitude [m] Velocity
[m/s]
Average data density Hydro 4 adjacent points within distance hydro
2 sigma
Average data density topo
(Points / m2)
Swath width [m] / effective swath width [m]
A 250 76 1,7 x 1,7 m 2,0 m 5 / m2 110 / 80
B 300 74 1,9 x 1,9 m 2,3 m 4 / m2 135 / 100
C 400 74 2,2 x 2,2 m 3,4 m 2 / m2 180 / 150
D 401 80 2,4 x 2,4 m 3,6 m 1,5 / m2 230 / 200
E 403 80 2,7 x 2,7m 3,7 m 1,3 / m2 270 / 240
F 451 80 3,0 x 3,0m 3,8 m 1,2 /m2 300 / 270
G 501 80 3,2 x 3,2m 4,0 m 1,0 / m2 330 / 300