Following the In-Orbit Commissioning results, changes to the exposure times are required compared to the pre-launch estimates. This implies updates for this ETC taking into account all findings from commissioning. This is work in progress and this website will be updated once the new ETC is available.
In the meantime, and in order for the user to be able to calculate the exposure time for CHEOPS observations, we have generated an Excel sheet that, given the ‘Gaia Magnitude’ and the ‘Effective Temperature’ of the target star, returns the suggested exposure time for individual CHEOPS images. The excel sheet contains a Helper Sheet that explains how it should be used.
Click here to download the Excel sheet ‘ImageETCv1.5’.
The Excel sheet ImageETCv1.5 does not, however, compute the achieved precision in observations of a specified duration. For this purpose we continue to provide the original pre-launch ETC on this page. The predicted precisions are reasonably accurate if the exposure time is calculated by using the Excel sheet ImageETCv1.5.
Cheops ETC V 1.3
Copyright ©2018-2019 Space Research Institute, Austrian Academy of Sciences
Monika Lendl, Harald Ottacher
Copyright ©2010-2016 James Hall, https://github.com/MrRio/jsPDF