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GPS interferances from High Tension Power Lines

GPS interferances from High Tension Power Lines
Management of Construction 100
Construction Management NA
10-7-7305 Automotive
02 Test Track
Southwest U.S.
The location of the new test track at (customer) was directly under a high tension line. The contractor was utilizing GPS positioning for grader control for shaping sb grade elevations. It was determined that the occasionally the GPS controls were being affected by the High Tension power lines.
Stray frequency caused erratic readings of controls and effect sub-grade establishment
Bad elevations needed to be corrected.
Validate that using GPS or other electronic devices are not being affected by stray frequencies.
Updated: 03/2011