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Eric
White of the OGW, Branch of Geophysics provided training in swept-frequency
marine seismic data acquisition, processing, and interpretation for
five staff from the USGS Kansas District from October 15 to October
18, 2001. A member of the Nebraska District was also present for the
first three days of training. The training was conducted in the Kansas
District office and on-site at Lake Olathe and Cedar Lake.
![[Photo: Training participant prepares equipment for survey.]](kansas-photos/warehouse-prep.jpg)
| The
following summarizes the tasks accomplished each day: |
| Monday: |
Overview
of marine seismic fundamentals, survey planning, and GPS fundamentals.
Class exercises consisted of navigation message design and system
setup and breakdown. |
| Tuesday: |
Data
collection on Lake Olathe |
| Wednesday: |
Data
collection on Cedar Lake |
| Thursday: |
Data
management, data processing and interpretation exercises were
conducted. A round-table discussion on the advantages and limitations
of the swept-frequency marine seismic method and associated
training was also conducted. |
The
data acquisition, processing, and interpretation training for the
Kansas District included:
- Guidance in preparation and set-up of field equipment and
continuous seismic profiling survey design.
- Field-based practical experience running swept-frequency
marine seismic profiling survey lines transverse to the long axis
of the lakes.
- Use of the OGW BG continuous seismic profiling equipment,
including a swept-frequency tow-fish with pulse bandwidth of 2 to
15 kHz; acquisition console; tow-fish control unit; plotter for
real-time printing of data; and related data viewing and processing
software.
- Step-by-step instruction on data analysis and interpretation,
including real-time data viewing as well as post-processing and
interpretation.
- Sample integration of seismic data with additional geophysical
data from previous studies: shallow seismic reflections were correlated
to gravity cores previously collected from Lake Olathe.
- Data was backed up and copies left with district participants.
- Access to OGW BG staff for post-training follow-up and support
via phone and e-mail.
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