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The equipment used for this survey was Utsi Electronics’ Groundvue 1, a high resolution GPR with an effective maximum range of 5m. The radar uses bow-tie antennas for close ground coupling and arrayed antennas for narrowed signal beam. The survey area measured 70m x 20m. This area was designed to encompass the central area of interest, based on the Gosbecks site grid.
The best plotting of the results showed clearly a rectangular enclosure, but there was no response from the position of the magnetic anomaly within the enclosure. There is possibly a curved enclosing ditch visible to the east, south and west side. The great ditch, which is traversed on the north-east of the plot, is just visible, with the ditches of the portico foundations visible at the top of the plot.
The large magnetic anomaly just south of the great ditch, which was discovered on the 1995 magnetic survey is visible as a singular response. The use of GPR at Gosbecks was very successful; the suspected central enclosure was clearly identified, although there were no indications of anomalies within the enclosure. <1><2>
Geophysical Report: Utsi, Erica. 1999. GPR Survey of part of Gosbecks Romano-Celtic Temple for the Colchester Archaeological Trust Ltd.
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