The AQS 940 Acoustic Processor

Although this is a silent video, its plentiful captions ensure the viewer can gain a good idea of the lofarcram concepts being demonstrated.

LOFAR = Low Frequency Analyzer and Recorder

00:04 GEC-Marconi Avionics
00:30 The AQS 940 Acoustic Processor
           The cost effective system for the detection, localization and
           classification of submarines in shallow and deep waters.
01:00 Traditional monochrome LOFARgram displays -
           • Sound frequency on horizontal axis
           • Time on vertical axis (waterfall)
           Signal strength shown by intensity of frequency
           line (grey shading).
01:28 The AQS 940 Acoustic Processor adds colour
           to the LOFARgrams to designate the bearing of
           the sound source relative to the sonobuoy.
02:04 Association of colour to the bearing sector is
           shown by the colour wheel.
02:28 Allocation of colours to sectors can be altered
           to provide contrast.
03:12 Individual secors can be blanked out to remove
           interfering sound sources and to concentrate on
           areas of interest.
03:53 Sector zoom enables inspection of sectors of
           interest with imprived colour bearing resolution.
04:44 * Any of th eLOFARgrams can be selected for display
            as histograms (power vs frequency).
          * Colour bearing coding still applies.
          * All colour blanking and zooming effects are
            available on histograms.
05:57 Additionally all LOFARgrams can fe converted to histograms.
06:23 For LOFARgram display formats, scroll bars enable access
            to old data.
07:14 Display history can be extended and scrolled.
08:03 The AQS 940 Acoustic Processor
           The cost effective system for the detection, localization and
           classification of submarines in shallow and deep waters.
0822 GEC-Marconi Avionics

GEC-Marconi Avionics
The AQS 940 Acoustic Processor
Copy No 3
Duration 8½ minutes
Ref No. EM0311
VHS PAL Colour Mute