|Abstract||An electronic integrator with a tilne constant of one hour has been constructed for the purpose of deterrnining, in real time, the rnean hourly values of the magnetic field. After calibration, the error
in output did not exceed S mv for an input voltage of 1 volt. Temperature drift, referred to the output, is 0.2 per cent/degree C. Used with a fluxgate magnetometer giving a signal of 10 mv/y, the integrator should|
produce mean hourly values
accurate to 1y.