# Power¶

class baseband_tasks.functions.Power(ih, polarization=None)[source] [edit on github]

Calculate powers and cross terms for two polarizations.

For polarizations X and Y, 4 terms are produced:

Term

Value

Expanded

Other name

XX

Re(X X*)

Re(X)**2 + Im(X)**2

AA

YY

Re(Y Y*)

Re(Y)**2 + Im(Y)**2

BB

XY

Re(X Y*)

Re(X)*Re(Y) + Im(X)*Im(Y)

CR

YX

Im(X Y*)

Im(X)*Re(Y) - Re(X)*Im(Y)

CI

Parameters
ihtask or baseband stream reader

Input data stream.

polarizationarray or (nested) list of char, optional

Polarization labels. Should broadcast to the sample shape, i.e., the labels are in the correct axis. For instance, ['X', 'Y'], or [['L'], ['R']]. By default, taken from the underlying stream.

Raises
AttributeError

If no polarization information is given.

ValueError

If the underlying stream is not complex, the number of polarizations not equal to two, or the polarization labels not unique.

Methods Summary

 task(data) Calculate the polarization powers and cross terms for one frame.

Methods Documentation

task(data)[source] [edit on github]

Calculate the polarization powers and cross terms for one frame.