[fitsbits] ATNF/NRAO codes for polarization

[Tom Kuiper]

I would like to extend these codes as follows to handle signal statistics:

  Number Code      Meaning
11     mean (should be zero for Gaussian noise)
12     variance (proportional to power)
13     skewness (should be zero for Gaussian noise)
14     kurtosis (should be 3 for Gaussian noise)
1x     x = 5,7,9 (should be zero for Gaussian noise)
1y     y = 6,8 (should be 15, 105 for Gaussian noise)

Does anyone anticipate a problem with that?  Of course, some analysis 
software might choke on this instead of gracefully ignoring unknown codes.

Best regards

Tom