Frequency range

Frequency sweep, 200-300Hz; RAFOS sweep; CW signals 185-310 Hz

Max SPL:

195 dB re 1 micropascal at 1 m, 

efficiency 50%

Directivity index:

 3 dB in horizontal direction

Projector:

Micro-controller tunable “Organ-Pipe” with a symmetrical Tonpliz transducer , free flooded,   36 cm diameter

Controller:

32 bit Motorola MC68CK338 micro-controller.  Programmable via external SAIL connector.  Rubidium low power clock (ORCA design). Long term stability (Delta f)/f < 1 x 10^-9

Batteries:

Alkaline “D” cell assembly

Endurance:

3000 transmissions

Maximum operating depth:

2000 m for electronic housing, operating depth for projector unlimited

Material:

Aluminum 6061-T6 
End-caps hard anodized

Weight:

500 kg (225 kg submerged)

 Map of the experiment

Ray trajectories from RV Point Sur to Pioneer Seamount receiver

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     During February, 2002, one source was deployed near Guadeloupe, by IFM, Kiel, Germany as part of the MOVE program (Meridional Overturning Variability Experiment).

Before moored deployment, the sound source was tested at 800 m depth.  These results are from a hydrophone at depth 200m.  Sound intensity (note acoustic shadow and underwater channel concentration), and spectrogram of received signal, are shown below.