# Consequences

For all versions of GILDAS between oct19 and feb21

- Summing, averaging, or stitching spectra whose observing mode is either position switching, wobbler switching, or unfolded frequency switching gives the expected output spectrum.
- Summing, averaging, or stitching folded frequency switching spectra could lead to slightly incorrect noise estimations in some specific conditions.
  - If the user is summing, averaging, or stitching all the spectra in a single command, the output spectrum intensities and their associated noise level are behaving as expected.
  - Only when the user is summing, averaging, or stitching folded frequency switching spectra in subsequent calls to the AVERAGE, ACCUMULATE, or STITCH commands would lead to incorrect noise levels. The shape of the line is nevertheless preserved.