The survey was undertaken using four Bartington Grad601 sensors mounted at 1m intervals (1m traverse interval) onto a rigid carrying frame. The system was programmed to take readings at a frequency of 10Hz (allowing for a 10-15cm sample interval) on roaming traverses (swaths) 4m apart. These readings were stored on an external weatherproof laptop and later downloaded for processing and interpretation. The system was linked to a Trimble R8s Real Time Kinetic (RTK) differential Global Positioning System (dGPS) outputting in NMEA mode to ensure a high positional accuracy for each data point, in accordance with EAC guidelines (EAC 2016). The survey has not identified any anomalies of definite or possible archaeological origin. The only anomalies present in the data is a service pipe and series of four parallel field drains in the northern parcel of the site and agricultural ploughing trends in the southernmost parcel. No magnetic anomalies have been recorded which may relate to LiDAR/remote sensing features of possible boundaries or former extraction sites. There is also no evidence of any anomalies which might relate to an early medieval settlement possibly located south of Yarlet School c.400m to the east of the southernmost survey area.
Matt Berry (Sat,) studied this question.