TOPAS –
Technical specifications
|
Models: |
TOPAS PS 18 |
TOPAS PS 40 |
|
Operating
principle |
Parametric |
Parametric |
|
Frequency
range |
0.5-6kHz / 15-21 kHz / 30-42 kHz |
1-10kHz / 35-45 kHz / 70-90 kHz |
|
Source
level |
208/242/225 dB for the different frequencies |
207/241/226 dB for the different frequencies |
|
Signatures |
CW, Chirp, Ricker |
CW, Chirp, Ricker |
|
Heave
compensated |
Yes |
Yes |
|
Pitch
compensated |
Yes |
Optional |
|
Roll
compensated |
Yes |
Yes |
|
Transmit
transducer |
1.1 x 1.1 m |
0.8 x 0.5 m |
|
Receive
transducer |
Same as transmit, optional EM 120 |
0.2 x 0.3 m |
|
Beamforming principle |
On transmit and on receive (optional) |
On transmit |
|
No of
simultaneous beams |
1 |
1 |
|
Fan of
beams |
Scanning, RDT |
Scanning, RDT |
|
Horisontal resolution |
<5 x 5 deg |
3 x 6 deg |
|
Sidelobe structure |
No sidelobes |
No sidelobes |
|
Vertical
resolution |
<25cm |
<10 cm |
|
Bottom
detection |
Built-in or external |
Built-in or external |
|
External
trig |
yes |
yes |
|
Transmission
pattern optimized for EM timing |
Yes, if synchronized |
Yes, if synchronized |
|
Terrain
adapted beam steering |
Requires slope input |
Optional, requires slope input and pitch option |
|
Audible
noise inside hull |
None |
None |
|
Operational |
Independent |
Independent |