Site 041 - Geophysics Survey Report Heritage Non-intrusive Survey Reports Group 003

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 archaeological cause which may relate to nearby archaeological assets relating to an Iron Age pit alignment, cropmarks of possible Neolithic, Bronze Age, Iron Age and Medieval date or post Medieval water meadow. Magnetic disturbance is widespread in areas around the farm, field boundaries and former greyhound/horse track. The only findings of note are several discreet low magnitude responses in the westernmost parcel which are most likely natural in origin but for which an archaeological cause cannot be entirely dismissed. Linear trend anomalies parallel to the present boundaries identify agricultural patterns.