Data was collected using a cart carrying four paired Bartington magnetic sensors. Four sensors mounted 1m horizontally apart and very accurately aligned to nullify the effects of the earth's magnetic field. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. Each data point is geographically referenced using an on-board Trimble RTK survey grade GPS system. Readings were taken at 0.125m centres along traverses 1.0m apart. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. The magnetometer survey has recorded magnetic responses that have been interpreted as being of possible archaeological interest. Discrete ditch-like responses and trends have been detected which could mark the locations of ditches. Parallel ditch-like responses in Area 3 have tentatively been interpretated as a partial double ditched enclosure that extends beyond the limits of the survey. Uncertain discrete anomalies, trends and circular zones of increased response have been detected throughout the data. The circular zones of increased response could mark the location of infilled chalk extraction pits. Archaeological origins for the other anomalies cannot be entirely discounted: however, the majority have probably been caused by natural or agricultural processes. Modern ploughing, natural responses and a service pipe have also been marked in the survey.
Thomas Cockcroft (Wed,) studied this question.