Sander Geophysics, 2016
Sander Geophysics Limited (SGL) conducted a fixed-wing high-resolution aeromagnetic, gammaray spectrometry and frequency-domain electromagnetic survey in the vicinity of Dublin in the Republic of Ireland for the Geological Survey of Ireland (GSI). The survey block “A1” is part of the ongoing Tellus Programme that commenced with the Tellus Airborne Geophysical survey of Northern Ireland in 2005/2006, conducted by the British Geological Survey (BGS), and the subsequent Tellus Border Survey in 2012 jointly administered by the GSI and the Geological Survey of Northern Ireland (GSNI).
The survey was conducted using SGL's De Havilland DHC-6 Twin Otter, registration C-GSGF. Production flights commenced on June 29, 2015 and were completed on October 31, 2015. A total of 89 flights were flown during the survey to complete the planned 32,642.3 line kilometres. The survey operations were conducted from Weston Airport (EIWT). The traverse lines were oriented N15°W and spaced at 200 m. The control lines were oriented E15°N and spaced at 2,000 m. The target clearance was 60 m above ground level, based on the Irish Aviation Authority (IAA) permit. The target average ground speed was 60 m/s, or 115 knots.