Array GPR investigation of the cathedral of Uppsala

• In this paper an example of a so-called array GPR investigation outside the Cathedral of Uppsala, Sweden is shown. The aim with the investigation was to reveal historically interesting features in a surrounding where excavation is not allowed. In the investigation 17 different GPR antennas of the same frequency was used to give measurements in 16 parallel profiles simultaneously. When several separate transmitter and receiver antennas are combined into one single antenna array unit, exactly positioned parallel profiles are gained, resulting in a seamless high-resolution 3D picture of the subsurface. Processing the radar data into the resulting images involves several steps as aligning traces, removing static shifts and match the mean response. Radar data is merged with geometry data from a total station (used to track the position of the antenna array) and then gridded and migrated. The resulting pictures in form of time slices gave in the presented Uppsala case the archaeologists very valuable help to understand the subsurface and map historical anomalies. The findings points on older paths and early medieval streets among others.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences (hsv//eng)

Nyckelord

markradar

geofysik

GPR

Uppsala

Uppsala Domkyrka

Earth sciences

Geovetenskap

History and philosophy subjects

Historisk-filosofiska ämnen

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)