Symbol  Description 
Polarization angle (N through E)  
Polarization angle at  
Frequency  
Channel width in frequency  
Central frequency of a channel  
Wavelength  
Wavelength to which all polarization vectors are derotated  
Central wavelength squared of a channel  
Channel width in wavelength squared  
Total bandwidth in wavelength squared.  
Faraday depth  
FWHM of the main peak of the RMTF  
Rotation measure  
Weight function  
w_{i}  Weight of the ith data point 
K  One over the integral of W or one over the sum of weights 
Faraday dispersion function without spectral dependence  
Reconstructed approximation to  
General form of the Faraday dispersion function  
Spectral dependence in I, normalized to unity at  
Frequency spectral index  
Complex polarized surface brightness  
Observed P:  
Complex polarization fraction  
Rotation Measure Transfer Function (RMTF)  
Magnetic induction  
Position vector  
Thermal electron density  
Spectral index of the relativistic electron energy distribution  
Real part of z  
Imaginary part of z  
Merit function for traditional linear least squares fitting of rotation measures. Defined in Eq. (49) 

rms noise in a single channel map  
,  rms noise in single Q or U channel maps 
,  Standard error of and in individual channel maps 
,  Standard error in Faraday depth and position angle at 
Standard deviation of the distribution of
values that are sampled. This is a measure of the effective width of the sampling 

Dirac delta function 