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 detected numerous magnetic responses that have been interpreted as being of archaeological interest. Discrete anomalies plus linear and curvilinear trends are visible in the magnetic data which are associated with the DMV. Many of these responses have a good correlation with the earthwork survey. The responses reflect house platforms, ditches / gullies, banks / possibly walls, burnt features, pits and holloways / trackways. In places, some of the anomalies have been difficult to interpret with confidence due to the topographic effects and increased levels of background 'noise'. Ridge and furrow cultivation has also been plotted in the survey. In Area 1, the gap in the data coincides with a former extraction pit and magnetic disturbance may also be associated with past quarrying activities. Magnetic disturbance in Area 2 could be a result of landscaping or just possibly reflect disturbed former earthwork features.
Thomas Cockcroft (Wed,) studied this question.