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imagepol.sigmalinpolposang - Function
1.1.4 Error in linearly polarized position angle
Description
This function returns the error (standard deviation) of the linearly polarized
position angle (0.5tan-1(U∕Q)) in degrees. This result comes
from standard propagation of errors. The result is an on-the-fly Image tool as
the error is signal-to-noise ratio dependent.
This function requires the standard deviation of the thermal noise. You can either supply it if you know it, or it will be worked out for you with outliers from the mean clipped at the specified level.
Arguments
Inputs |
| ||
clip |
| Clip level for auto-sigma determination
| |
| allowed: | double | |
| Default: | 10.0 |
|
sigma |
| Standard deviation of thermal noise. Default is auto
determined.
| |
| allowed: | double |
|
| Default: | -1 |
|
outfile |
| Output image file name. Default is unset.
| |
| allowed: | string |
|
| Default: |
|
|
image
Example
"""
#
print "\t----\t sigmalinpolposang Ex 1 \t----"
po.open(’stokes.image’)
siglppa = po.sigmalinpolposang()
siglppa.statistics()
siglppa.done()
#
"""
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Copyright © 2016 Associated Universities Inc., Washington, D.C.
This code is available under the terms of the GNU General Public Lincense
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