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CHIRPceiver Sub Bottom Profiler for Towed and Hull Mount Systems

Towed, Hull Mount & Over the Side Chirp Sub Bottom Profiler

The HMS-622 CHIRPceiver and its associated transducers and arrays can fill a wide range of sub-bottom survey needs. Hull Mount, pole-mount, Over-the-side and towed applications available in both dual and single frequency configurations and supports three frequency bands. The Falmouth Scientific HMS-622 is a high power, portable, subbottom profiling system utilizing linear swept FM or 'Chirp' technology that provides deep bottom penetration through a variety of sediments.

Falmouth Scientific, Inc.

Pocasset, US

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Description

The Falmouth Scientific HMS-622 Sub bottom Profiling System is a high power, portable, subbottom profiling system for towed, hull mount and over the side configurations utilizing linear swept FM or Chirp technology that provides deep bottom penetration through a variety of sediments. Sub-bottom profiling applications in diverse sediments require multiple frequency bands to support diverse survey requirements. The HMS-622 CHIRPceiverTM and transducer arrays and vehicles fill this wide range of survey needs. The frequency band supported by the HMS-622 include standard LF (1KHz-10KHz), and optional ULF (200Hz-2KHz) and HF (8KHz-23KHz). It can be easily configured for up to 50Khz with a standard 2 channel transceiver. CW frequencies can also be programmed within the respective band. The transducer and hydrophone arrays are configured to perform both the transmit and the receive functions of the system.

The HMS-622 CHIRPceiver uses a flexible Graphical User Interface connected via Ethernet that allows the user to set CHIRP or CW modes of operation, Start and Stop frequencies, and Pulse Lengths and Power Level for the output pulses. The receiver controls allow for Gain and Attenuation as well as Diagnostic modes. The user selectable direct 24 bit A/D input allows the user to input data for the HMS-620 Bubble Gun or other analog seismic system. The HMS-622 CHIRPceiver will also support multi-ping modes for higher along track resolution when operating in water depths deeper than a given ping rate. All sonar data is logged in SEGY format using industry standard acquisition software.

The CHIRPceiver is also available in a low cost single channel version for coastal surveys less than 500m water depth.

CHIRPciver Options

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Specifications

Towfish: Tow speed

1-8 Knots

Weight in air [kg]

49

Dimensions

91.44cm x 45.72cm x 45.72cm (36in x 18in x 18in)

Physical properties of transducer head: Model

HMS-ATTR-4.5K Standard, HMS-ATTR-15K, HMS-650

Height [m]

0.28

Length [m]

0.183

Width [m]

0.183

Weight in Air

12.7Kg (28lbs)

Mode of operation: Platform type

Hull Mounted, Side Mounted, Pole Mounted, Surface Towed, Deep Towed, Towed

Signal composition

Chirp, Broadband, Dual Frequency, Single Frequency

Operating System

Windows

Min. depth of operation [m]

1

Max. depth of operation [m]

6

Min. frequency [Hz]

200

Max. frequency [Hz]

25

Power output [W]

4000

Max. resolution [m]

0.05

Max. penetration [m]

50

Max. pulse rate [Hz]

16

Max. pulse length [s]

0.1

Dynamic range [dB]

114

Programmable source signatures

On the fly selectable frequency bands

Source Level

212 dB re 1uPa@ 1m nominal

Frequency

Wide band

Transmit Transducers

Bands 200Hz-2KHz, 1KHz-10KHz, 8KHz-23KHz

Data Rate

100/1000Base-T

Pulse Repetition Rate

16Hz (63ms)

Cable length

2000m Multi-conductor

Hardware/software requirements: Operating System

Windows 7 or higher

General: Product type

Sub bottom profiling systems, CHIRP, SBP, Sub Bottom Profiler, Sub-bottom, sub bottom, Hull Mount

Application

High Resolution

Power type

AC

Portability of logger

Portable

Components to be used in combination with product

FSI Subbottom Transducers or Existing Transducer Arrays, HMS-622, Hull Mount, Pole Mount, Small Vessel, Transducers

Max power consumption [W]

1500

Transducer weight [kg]

11.4

Operating temperature: max. [°C]

40

Operating temperature: min. [°C]

-5

Size (Deck unit)

55.88 cm x 53.34 cm x 25.4 cm (22 in x 21 in x 10 in)

Weight (Deck Unit)

Single 17.24 kg (38 lbs)/ Dual 19.95 kg (44 lbs)

Integration in work process: Real time coupling to survey software

Y

Remote operation

Y

Data Processing: Connections

LAN

Internal logging

Data output

SEGY

Formats

SEGY

Data displayed

Most third party software (Chesapeake, Hypack, OIC, etc)

Main use

Subbottom Profiling

Post-processing

Most Third Party Software (Chesapeake, Hypack, OIC, etc)

Over-the-side mount assembly: Dimensions

40.64cm x 40.64cm x 45.72cm (16in x 16in x 18in)

Mounting Staff

Flange Mount

Weight

56.24Kg (124lbs) 2x2 Array HMS-ATTR-4.5K