TechnicalNote Rapid Archaeological Acquisition System
Archaeology
TerraDat’s archaeological capability has been recently enhanced through the use of a specialist magnetic gradiometry carrier system. This system utilises eight Foerster FEREX CON 650 gradiometer probes mounted on a towed rig. Real-time, sub-centimetre accurate positioning is provided by a Trimble 5700 RTK GPS. The rig is towed across the survey area behind a 4x4 vehicle or ATV acquiring swaths of data up to 3.5m wide. The probes are spaced 0.5m apart giving twice the resolution of a conventional gradiometry survey. In optimal field conditions, the new system allows acquisition rates of up to 40 hectares per day - significantly reducing survey costs and time over a conventional walked survey. As one of Europe’s leading environmental geophysical contractors, TerraDat’s enhanced processing and interpretation capabilities allow datasets to be further interrogated to provide information on a variety of site hazards such as shallow UXO, mine workings and buried structures and services.
*Cost Effective *Non-invasive *Rapid Ground Coverage *Environmentally Friendly *Swift Mobilisation/Global Coverage
, Up to 40 hectares a day
1007 58.021
58.23 Hedge
60.09
Grass
60.51
60.92
k q
h
m
Hedge Ht=2.2m 57.65 57.64
58.94
57.12
67.28
TH 57.67
Pond
61.17
61.06
Hedge
Ht=2.2m
58.92
57.52
j
59.80
57.74
f 62.77
Grass
62.13
g
e
b
1005 62.533
58.71
63.75
Ht=2.0m
e
Hedge
62.80
Grass
n
a
61.61
n
n
h
62.95
n
61.09
c
61.49
60.85
o
n
65.204
1009
Ht=2.0m
59.48
60.23
p
q
The Sensys rig can be towed by a variety of vehicles from ATVs to tractors
, Geophysical and archaeological interpretation by experienced specialists , Twice the resolution of a conventional gradiometry survey , Survey results provided in CAD/GIS formats
Example of finalised data - magnetic gradiometry (left) and interpretive plot (right), data can be suppled in a variety of CAD and GIS formats Contact Simon Hughes for more info; simon@terradat.co.uk
TerraDat (UK) Ltd - Tel (08707 303050) www.terradat.co.uk