GSNI Tellus Regional Airborne Geophysical Survey - Electromagnetics

This dataset presents the results of the Tellus Electromagnetic data as xyz data. Channels in the dataset are: X: Grid Easting (m) Y: Grid Northing (m) LAT: WGS84 latitude in decimal degrees LONG: WGS84 longitude in decimal degrees FID: Numerical sum of Julian day and seconds past previous midnight FLIGHT: Flight number DATE: Date of survey flight (YYYYMMDD) DAY: Day number (Julian) TIME: Time (HHMMSS.SS) DIR: Flight direction (degrees clockwise) RALT: Radar altitude (m) GPS_H: GPS altitude (m) above geoid (WGS84) DTM: Digital Terrain Model (m) PLM: Power-line monitor (no units)

RE_LF: EM real (in-phase) component, low frequency (2005: 3125 Hz; 2006: 3005 Hz), ppm IM_LF: EM imaginary (quadrature) component, low frequency (2005: 3125 Hz; 2006: 3005 Hz), ppm Low_Freq: Low frequency (2005: 14368; 2006: 11962), Hz RE_HF: EM real (in-phase) component, high frequency (2005: 14368 Hz; 2006: 11962 Hz), ppm IM_HF: EM imaginary (quadrature) component, high frequency (2005: 14368 Hz; 2006: 11962 Hz), ppm High_Freq: High frequency (2005: 14368; 2006: 11962), Hz

LFApRes: EM apparent resistivity, low frequency (2005: 3125 Hz; 2006: 3005 Hz), ohm.m LFDepth: EM apparent depth, low frequency (2005: 3125 Hz; 2006: 3005 Hz), m HFApRes: EM apparent resistivity, high frequency (2005: 14368 Hz; 2006: 11962 Hz), ohm.m HFDepth: EM apparent depth, high frequency (2005: 14368 Hz; 2006: 11962 Hz), m

Data and Resources

Additional Info

Field Value
Creation Date June 3, 2016, 14:09 (UTC)
Topic Category
  • Environment
  • Geoscientific Information
  • Imagery / Base Maps / Earth Cover
  • Location
Lineage

Information on survey, processing and data conditioning can be found in the following reports: Beamish, D.; Cuss, R.J.; Lahti, M.; Scheib, C.; Tartaras, E.. 2006 The Tellus airborne geophysical survey of Northern Ireland : final processing report. Nottingham, UK, British Geological Survey, 74pp. (IR/06/136) (Unpublished) http://nora.nerc.ac.uk/7427/ Beamish, D.; Cuss, R.J.; Lahti, M.. 2006 The Tellus Airborne Geophysical Survey of Northern Ireland. Phase 1, logistics report. Nottingham, UK, British Geological Survey, 55pp. (IR/06/032) (Unpublished) http://nora.nerc.ac.uk/7184/

Frequency of Update Irregular
Contact Name Alex Donald
Contact Email gsni@economy-ni.gov.uk
Additional Information

An airborne geophysical survey of the whole of Northern Ireland was flown by the Geological Survey of Northern Ireland in 2005 and 2006 as part of the Tellus project funded by the Department of Enterprise, Trade and Investment of Northern Ireland and by the Rural Development Programme through the Northern Ireland Programme for Building Sustainable Prosperity. Magnetic, electromagnetic and radiometric data were acquired at 200 m line spacing and a flying height of 56 m (240 m over built-up areas) using the Joint Airborne Capability of the British Geological Survey and the Geological Survey of Finland. In total, 82,000 line-km of data were acquired.

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