Error reporting for 4 band imagery (e.g. Sequoia)

Hi there,
We are using 4-band data from the Seqouia sensor and would like to know how the RMSE is calculated. As there are 4 bands of data we mark GCPs in each band.

The error reporting does not report an error for each band, it only reports one assessment of error. Is the error a combined error from all 4 bands or is it the error for just one band?
Cheers
Ben

Hi Ben,

The RMSE for multispectral images is the average errors of all bands.