Following the brief sighting of an unidentified flying object in Gulf Breeze, Florida in September 1992, investigators made an area search using a fluxgate gradient magnetometer and found a strong magnetic field gradient, indicative of a strong source of magnetic field, which appeared to be at or above the tops of some trees near a small pond. Three circles of depressed grass were found in the ...

INTRODUCTION The earliest geophysical exploration strategies relied on measurements of variations in the Earth's magnetic field. Even today, magnetic methods are the most commonly used geophysical exploration techniques because magnetic observations can be made relatively easily and cheaply. Although compasses are the most common type of mechanical device used to measure the horizontal attitude...

Eliminating the magnetic interference of carrier platform is an important technical link and plays a vital role in aeromagnetic survey. The traditional compensation method based on Tolles–Lawson (T-L) model establishes linear relationship between aircraft field attitude. coefficients are solved by designing calibration flight. At present, almost all systems use fluxgate magnetometer fixed to re...

The development of novel methods, scientific devices and means for measuring magnetic fields generated by ultra-low current is among promising directions in the medical equipment instruments geodetic surveys space exploration. present work to develop a small sensor capable detecting weak fields, which sources are biocurrents, radiation far objects slight fluctuations geomagnetic field. Scientis...