Kongsberg HiPAP 101, Product Description

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Product Description
317748/F 39
8.4 HiPAP® processing
HiPAP ® SSBL
processing

The HiPAP® system determines the position of a subsea
target (transponder or responder) by controlling a narrow
reception beam towards its location. The system uses a
digital beam-former, which takes its input from all the
transducer elements.

The system uses a number of wide fixed beams to generate
an approximate position for the target. Once this is achieved,
it uses data from all the elements on the hemisphere facing
the target to compute the narrow reception beam and
optimise the directional measurement.

The range is measured by noting the time delay between
interrogation and reception. The system will control the
beam dynamically so it is always pointing towards the
target. The target may be moving, and the vessel itself is
affected by pitch, roll and yaw. Data from a roll/pitch sensor
is used to stabilise the beam for roll and pitch, while
directional data from a compass is input to the tracking
algorithm to direct the beam in the correct horizontal
direction.

The HiPAP® transceiver can operate with up to 56
transponders simultaneously. The data is sent to the
computer.
HiPAP ® LBL
processing

This mode is similar to the HiPAP® SSBL processing, but
the transceiver positions up to 8 LBL transponders for each
single LBL interrogation. Both ranges and directions to the
transponders are measured.
HiPAP ® MULBL
processing

This mode is similar to the HiPAP® LBL processing, but
the transceiver does not interrogate the MULBL transponder
array, it only listen for the replies from the array. The
transceiver can listen for to 8 LBL transponders. The
direction to the transponders and the time difference
between the received replies is transmitted to the computer.
HiPAP ® Telemetry
processing

The unit transmits acoustic telemetry messages, and receives
and decodes the acoustic telemetry message from the
transponder. The data is sent to the computer.