Walking is the simplest, cheapest, and most widely used method for collecting magnetic field data. Its efficiency, however, is limited. During measurements, the surveyor walks along pre-planned routes while carrying the sensors. Typically, data coverage is around 10-12 km per day.
To increase the efficiency of data collection we fixed the components of the magnetometer (Overhauser Magnetometer – GEM GSM-19) on a polypropylene framework of pipes, anchored to an aluminum-framed hard-tail mountain bike. This combination of materials provides a robust, non-magnetic platform that maintains the sensors at a constant height above ground during the entire survey. The framework of triangles is flexible enough to absorb shocks during the ride in various velocities. This allows to collecting data along paved and dirt roads as well as along off-road single tracks. We collect 30-60 km of data per day, depending on the conditions.
Most of the acquisition was carried out downhill at speeds of 15-45 km per hour. An accompanying vehicle transferred the bike and gear from the base of every hill to the top of the following one. The second stage showed that the bike-mag offers a cheap, simple and efficient solution that requires a minimal investment – during data acquisition, transport of the gear and repairments. Recently we passed the 1000 km of data collection.
Thanks for visiting our site,
Uri, Amit, Vladimir and Michael – BikeMag team
Dr. Uri Schattner – rider, developer, geophysicist, University of Haifa
Dr. Amit Segev – geologist, Geological survey of Israel
Dr. Vladimir Lyakhovsky – geophysicist, Geological survey of Israel
Dr. Michael Rybakov – geophysicist, Geophysical survey of Israel