Polarization Calibration: Difference between revisions
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:<math> L = X - iY </math> | :<math> L = X - iY </math> | ||
In terms of autocorrelation powers, we have the 4 polarization products XX*, YY*, XY* and YX*, where the * denotes complex conjugation. The quantities RR* and LL* are then | In terms of autocorrelation powers, we have the 4 polarization products XX*, YY*, XY* and YX*, where the * denotes complex conjugation. The quantities RR* and LL* are then | ||
:<math> RR^* = (X + iY)(X + iY)^* = XX^* - iXY^* + iYX^* +YY^* </math> | :<math> RR^* = (X + iY)(X + iY)^* = XX^* - iXY^* + iYX^* + YY^* </math> | ||
:<math> LL^* = (X - iY)(X - iY)^* = XX^* + iXY^* - iYX^* + YY^* </math> | |||
== Polarization Mixing Correction == | == Polarization Mixing Correction == | ||
Due to relative feed rotation between az-al mounted antennas and equatorial mounted antennas | Due to relative feed rotation between az-al mounted antennas and equatorial mounted antennas | ||
Revision as of 19:54, 24 September 2016
Linear to Circular Conversion
At EOVSA’s linear feeds, in the electric field the linear polarization, X and Y, relates to RCP and LCP (R and L) as:
In terms of autocorrelation powers, we have the 4 polarization products XX*, YY*, XY* and YX*, where the * denotes complex conjugation. The quantities RR* and LL* are then
Polarization Mixing Correction
Due to relative feed rotation between az-al mounted antennas and equatorial mounted antennas