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The system mainly consists of three collecting chains; one laser range finder for land (topographic),
one laser range finder for seabed (hydrographic) and a camera collecting images.
The unique HawkEye II feature is that they all operate simultaneously in a synchronised way.
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The laser range finders emits pulses and measure the time distance from output pulse to return pulse
in order to calculate the distance to target. The two laser range finders each has its own laser,
photo detectors and receiver electronics, though they share the same scanning mirror, reception
telescope and control computers.
The pulsed laser responses are received by a telescope and photo detectors converting them to electrical
signals. The signals for the hydrographic chain are sampled using digitizers and stored together with
navigational data and scanner positions in order to enable post processed high precision positions of
land and seabed. The data is also processed during flight for realtime presentation and monitoring of
survey progress.
The Digital Camera takes images in a rate that it covers the ground with some overlap. Each image covers
the width of the flightline.
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The Hawk Eye II ALBTS System consists of two main units
- Control and Monitoring System
(600x360x700mm, 60kg)
- Sensor System (1210x500x619mm, 95kg)
The following parts are also part of the Hawk Eye II System
- Operator Console Laptop
(330x272x31mm, 3kg)
- Pilot Monitor (255x170x60mm,
2kg)
- System Cabling (7kg)
- Aircraft Installation Kit (700x540x10mm, 7kg)
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The Hawk Eye II ALBTS System Sensor is both the heart and the brain of the measurement system
and controls and supervise the following vital parts of the system:
- Scanner for positioning the
shots on the groun/surface and compensate for
crosstrack, roll and pitch deviations.
- Hydrographic Laser that emitts
short high energy pulses mainly at 532nm wavelength
for deepest possible penetration through the water
volume.
- Topographic Laser that emitts
short pulses at 1064nm wavelength.
- Hydrographic Receiver that
makes it possible to collect hydrographic data at 4kHz
- Topographic Receiver that
makes it possible to collect topographic data at 64kHz
- Digital camera that stores high quality timestamped images.
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