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Utility-Locating Technology Development Using Multisensor Platforms (2014) / Chapter Skim
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Pages 110-115

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From page 110...
... 110 A p p e n d i x C C.1 purpose The purpose of this Standard Operating Procedure (SOP) is to provide general procedures for geophysical data collection during subsurface utility field investigations using the SHRP 2 R01B time domain electromagnetic induction (TDEMI)
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From page 111...
... 111 at the designated project location. For TDEMI DGM activities this equipment includes • RTK GNSS; and • SHRP 2 R01B TEM 5-by-1 sensor array on metal-free platform a.
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From page 112...
... 112 • Noise threshold -- detection capabilities of electromagnetic induction (EMI) instruments can be adversely affected by natural and/or cultural features (high ambient moisture, surface or near-surface metal, lightning, power lines, etc.)
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From page 113...
... 113 C.7.4 Partial Coverage Geophysical Surveys For partial coverage DGM, digital geophysical data are collected in either a designed pattern or a meandering path fashion. Data sets are collected in the same manner as for full coverage digital grid surveys with the only exception being that 100% coverage is not required.
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From page 114...
... 114 C.8.2.1 Equipment Warm-Up ApplicAbility TEM procedure Minimize sensor drift due to thermal stabilization. Most instruments require several minutes to acclimate to current weather conditions (temperature, humidity, etc.)
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From page 115...
... 115 with the site position instrumentation and in the projectspecific coordinate system. Those chain endpoint positions should be included in the project location survey file.
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