mpaillassa

Yes I think it could be nice to have both. I propose a definition and different names for each: - Area covered by a single frame/exposure or by the CCD...

Similar SNR references from [HSC](https://www.subarutelescope.org/Observing/Instruments/HSC/hsc_etc_report.html) and [LSST](https://smtn-002.lsst.io/).