Position Angle Calibrate a Polarization Spectrum CALPA
Position Angle Calibrate a Polarization Spectrum
A polarization spectrum is corrected for wavelength dependent position angle zero point by applying
a calibration curve obtained using the CALFITPA
command.
This command is needed for polarimeters which are based on the use of a superachromatic half-wave plate, since such a plate shows significant cyclic wavelength variations of the position of its fast axis.
1 | INPUT | TSP , 1D | The Polarization spectrum to be corrected. |
2 | CALIB | TSP , 1D | The calibration spectrum. |
3 | OUTPUT | TSP , 1D | The output corrected dataset. |
20/11/1991