Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015
GB/NERC/BAS/PDC/01517
Abstract:
We present here Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015.
Data are provided in SEG-Y format.
This project was funded by UK Natural Environment Research Council Grant NE/J006548/1: Depositional patterns and records in sediment drifts off the Antarctic Peninsula and West Antarctica
Citation:
Larter, R., Hogan, K., Hillenbrand, C., & Gowland, E. (2021). Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/bdfeb69c-df5c-461d-b7a8-583f9daab685
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License
| Access: | None |
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| Use: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Please cite this dataset as follows: Larter, R., Hogan, K., Hillenbrand, C.-D., & Gowland, E. (2021). Topographic Parametric Sonar (TOPAS) acoustic sub-bottom profiler data acquired on RRS James Clark Ross JR298 cruise in 2015 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/BDFEB69C-DF5C-461D-B7A8-583F9DAAB685 |
Basic Information
| Creation Date: | 2021-07-02 |
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| Dataset Progress: | Planned |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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Additional Information
| Reference: | Larter, R.D., Hogan, K.A., Hillenbrand, C.-D. & Benetti, S. 2016. Debris-flow deposits on the West Antarctic continental slope. In: Dowdeswell, J.A., Canals, M., Jakobsson, M., Todd, B., Dowdeswell, E. & Hogan, K. (eds) An Atlas of submarine glacial landforms: modern, Quaternary and ancient. Geological Society, London, Memoirs, 46, 375-376. doi:10.1144/M46.155. Sara Rodrigues , F. Javier Hernandez-Molina, Robert D. Larter, Michele Rebesco, Claus-Dieter Hillenbrand, Renata G. Lucchi, Francisco J. Rodriguez-Tovar (2021). Sedimentary model for mixed depositional systems along the Pacific margin of the Antarctic Peninsula: decoding the interplay of deep-water processes. Marine Geology (in review) |
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| Quality: | A swept-frequency ("chirp") transmission pulse was used, which required the return signals to be cross-correlated with the source signature (matched filter) throughout the cruise to extract signals with a simple effective waveform, which also has the benefit of reducing random noise (see more information in the cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr298.pdf) | |
| Lineage/Methodology: | These data were collected using a Kongsberg Simrad TOPAS PS018 acoustic sub-bottom profiler. The TOPAS system operated by transmitting a chirp pulse with a frequency band of 1.5-5kHz and length of 10 ms. The receiver had a sample rate of 20 kHz with a trace length of 400 ms, and the gain (in dB) was controlled by the sonar watchkeeper with a range of 2-15 dB and a high-pass filter of 1-2 kHz . Logging of sub-bottom profiler data began at 1514 UTC on Julian day 032, and the system was operated near-continuously during the cruise until 1208 UTC on Julian day 058 when the JCR was approaching Rothera.TOPAS was re-started at 1014 UTC on Julian day 059 and was run until a location in the Drake Passage, 200 nautical miles from the coast at the edge of Argentina's exclusive economic zone. Pinging and logging of TOPAS sub-bottom profiles was stopped for the final time at 1756 UTC on Julian day 060. Additional settings information can be found in the cruise report: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/jr298.pdf |
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Extent
| Temporal Coverage: | |
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| Start Date | 2015-02-01 |
| End Date | 2015-03-01 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -70 |
| Northernmost | -59 |
| Longitude | |
| Westernmost | -96 |
| Easternmost | -66 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Antarctic Peninsula |
| Location | Bellingshausen Sea |
| Detailed Location | N/A |
Instrumentation
| Sensor(s): |
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| Source(s): |
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| Data Collection: | Data were collected using a Kongsberg Simrad TOPAS PS018 sub-bottom profiler |
Storage
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 13 GB |
| Distribution Format | N/A |
| Fees | N/A |
| Data Storage: | This dataset constains 560 SEG-Y files for a total size of ~12 GB. |