Table T10. Single-channel and deep-tow boomer surveys across the Antarctic Peninsula continental shelf.
|
Deep-tow boomer | Single-channel boomer | ||||||
|---|---|---|---|---|---|---|---|---|
| British
Antarctic Survey (James Clark Ross) |
Hamilton
College (USAP) (Polar Duke) |
Osservatorio
Geofisico Sperimentale (PNRA) (OGS-Explora) |
Rice
University (USAP) (Polar Duke) |
|||||
| Depositional environment | Shelf | Palmer Deep | Palmer Deep | Palmer Deep | Shelf | Shelf | ||
| Survey/profile |
1992/DTB-01A to O6A |
PD92, DTB Survey |
1997/I97H-218 to 223 |
I97-224 to 230 |
I97-233, -234 |
1988/PD88-04, -B |
||
Leg 178 Sites |
1100, 1102, 1103 |
1098, 1099 |
1098, 1099 |
1098, 1099 |
1100, 1102, 1103 |
1097 |
||
Source |
||||||||
Gun types |
Piezoelectric transducer |
Piezoelectric transducer |
GI |
Air gun |
GI |
Air gun |
||
Number of guns |
NA |
NA |
1, true GI mode |
1 |
1, true GI mode |
1 or 2 |
||
Volume |
NA |
NA |
2.5 L (150 in3) |
0.25 L (15 in3) |
2.5 L (150 in3) |
1.6 L (150 in3) |
||
Firing depth (m) |
NA |
NA |
4 |
2 |
4 |
1-3 |
||
Shot interval (m) |
NA |
NA |
12.5 |
9 |
12.5 |
20 |
||
Tow depth |
100 m from seafloor |
50-100 m from seafloor |
||||||
Sensors |
||||||||
Type |
1-m long, 6-element hydrophone |
10-element hydrophone streamer |
10-hydrophone array, spacing 1.6 m |
Hydrophone array |
||||
Tow depth |
Trailed from tow vehicle |
Trailed from tow vehicle |
1 m |
1 m |
1 m |
1-3 m |
||
Recording |
||||||||
Sampling interval |
100 µs |
100 µs |
1 ms (1000 Hz) |
0.5 ms (2000 Hz) |
1 ms (1000 Hz) |
1 ms (1000 Hz) |
||
Record length |
400 ms |
250 ms |
4 s |
2.5 s |
3 s |
2 s |
||
Notes: Acquisition parameters are indicated. NA = not applicable, GI = Generator Injector. Palmer Deep = Sites 1098 and 1099.