UAB'07 sea trial - Trondheim, Norway

Underwater Acoustic Barrier (UAB) project sea trial

2 - 15 September 2007, Hopavagen Bay and Trondheimsfjord, Norway.

1. Objectives: the UAB’07 sea trial fulfills the generic objectives of the UAB project namely:

to test at sea but in controled conditions the acoustic barrier concept using an array of sources and an array of receivers at various ranges, depths, frequencies, transmitted signals, with stationary and moving obstacles, etc.
to test various modulation schemes for underwater acoustic communication between an array of sources and an array of receivers (MIMO)
to test in controlled conditions the environmental based equalizer for passive time reversal communications

2. Means to be employed:

R/V Gunnerus Hopavagen Bay/Sletvik Station R/V Calanus

3. Personnel:
University of Algarve: S.M. Jesus, A. Silva, F. Zabel and C. Martins.
NTNU: A. Neyts, J. Hovem

4. Equipment:

Acoustic - Oceanographic Buoy (AOB): model 22, 16 hyd, 66 m apertura
Acoustic sound source Lubell 1442 and generator
2 Acoustic sources Lubel 916 C

5. Test areas:

Site 1 - TBS in Trondheim Bay
Site 2 - Hopavagen Bay (Sletvik Station)

6. Operations day by day:

August 30: UALG equipment arrives in Trondheim both from Faro and US;
August 31: 14:00 UALG team arriving in Oslo; Oslo - Trondheim by train;
September 1: 08:00 UALG team arrives in Trondheim;

September 3: equipment installation at the Trondehim Biological Station (TBS); visit to the Sletvik station as preparation for the next week experiment;

The "not so dry dock" at Sletvik

September 4: first day acoustic communications transmissions along the TBS transect for passive time-reversal using the R/V Gunnerus; CTDs along the transect;

September 5: second day acoustic communications transmissions along the TBS transect for testing the waveguide invariant depth/range compensation using the R/V Gunnerus;

Test plan: version 1.1 (29aug07) here

Last update: September 4, 2007