MilosavPejic
Newbie level 3
I have time series(magnetic field strength) in mV.I want to convert them to nT.The tutorial says I should perform FFT,than calibration and then inverse FFT.Calibration formula is
Can someone elaborate more on this please?
H=0.8V/nT*Fm*Ft*V
Fm=jf/jf+4Hz,
Ft=1591Hz/(1591Hz+jf)
Code:
The company has provided calibration files,example
FREQUENCY MAGNITUDE PHASE
Hz deg
Chopper Off
+4.0000E-01 +1.0714E-02 +1.4808E+02
+5.5580E-01 +1.3325E-02 +1.3911E+02
+7.7230E-01 +1.5775E-02 +1.2956E+02
+1.0731E+00 +1.7732E-02 +1.2025E+02
+1.4910E+00 +1.9094E-02 +1.1174E+02
+2.0718E+00 +1.9931E-02 +1.0442E+02
+2.8787E+00 +2.0392E-02 +9.8155E+01
+4.0000E+00 +2.0603E-02 +9.2520E+01
+5.5580E+00 +2.0611E-02 +8.7089E+01
+7.7230E+00 +2.0408E-02 +8.1384E+01
+1.0731E+01 +1.9949E-02 +7.4971E+01
+1.4910E+01 +1.9006E-02 +6.7315E+01
+2.0718E+01 +1.7761E-02 +5.8714E+01
+2.8788E+01 +1.5629E-02 +4.9042E+01
+4.0000E+01 +1.3116E-02 +3.9247E+01
+5.5580E+01 +1.0350E-02 +3.0040E+01
+7.7230E+01 +8.0188E-03 +2.2525E+01
+1.0731E+02 +5.9868E-03 +1.6408E+01
Can someone elaborate more on this please?