Abstract:
The design of four coil (identical air cored) Barker circular coils for producing an extended uniform magnetic field is described. The paper explains in detail how the coil system is interfaced with 0.1nT PPM to make it a complete Digital Vector PPM unit working under computer control. The paper concludes with the comparison of Vector PPM data with that of digital fluxgate magnetometer installed in our Alibag Magnetic observatory.
