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Data acquisition quality control guidelines
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General |
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To inspect a geophysical crew during field work, the following points need to be checked: |
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Acquisition scheme |
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- Is fieldwork conducted according to the specifications in the quotation?
- Exist deviations from the acquisition scheme proposed due to unexpected incidences? If yes, why?
- How are potential sources of noise and systematic errors considered (e.g., ambient seismic or electromagnetic noise, metallic objects, etc.)
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Field Crew |
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- Does a qualified geophysicist lead the crew?
- Are the helpers instructed adequately?
- Do qualified personnel check the work of the helpers?
- Is the field crew working efficient?
- Has one of the crew members the necessary licence (e.g., to handle explosive)
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Equipment and field computers |
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- Are the instruments specified in the quotation employed for the measurements? If no, what are the consequences in terms of acquisition speed and data accuracy?
- Are the instruments working properly?
- Are the computers suitable for fieldwork?
- Are backups performed regularly?
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Surveying |
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- How are the source and receiver coordinates determined (measuring tape, theodolite, GPS)?
- Is topography considered adequately?
- What is the coordinate accuracy? Is this accuracy sufficient for the geophysical method used?
- How is the recording, storage of the geometrical data? (Redundant?)
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Permitting, damages |
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- Was a permitting performed prior to the field campaign (if required)?
- Were the landowners informed about potential damages?
- Have any damages already occurred?
- Has the geophysical contractor an appropriate, liability insurance (should be checked prior to the field campaign)?
- All permissions existing? (explosives, radioactive sources?)
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QC in the field |
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- How often are the data recorded checked?
- How are the data checked?
- Exists a detailed field log-book, in which all significant incidences are documented?
- How are the data stored?
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Timing |
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- Corresponds the acquisition speed with the specifications in the quotation?
- Is the acquisition speed adequate, i.e., is the acquisition speed such that reliable measurements can be expected?
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