How do we calculate uncertainty when channels are binned

[hughbg]

Channels have to be binned by 1MHz. Each channel has a different number of points flagged within it. What is the uncertainty of the final binned channel?

[hughbg]

Binning is necessary for HiBayes. I'm not sure why it has to be 1MHz because there is a setting for the bin size in the code, and presumably it can be changed.

Currently the uncertainty in a channel is the RMS of the channel. This is calculated on the non-masked, non NaN values in the channel, which will be different for each channel. Perhaps need to be weighted in some way. If we have the weighted variance for several channels, and the channels are averaged, then the variances can be added.