This tool calculates the groups and integrations for an optimal transit observation. We require some information about your background star, transit, and planned use of JWST (instrument, subarray, and filter), in order to interpolate your planned transit observation to our nearest information from pandeia (which powers the JWST ETC.)
Please note the following caveats about this tool:
1. At present, this tool is likely to overestimate saturation on direct comparison to the ETC. (This means we may predict less groups -- and put the user in less danger of oversaturating your observation)
2. Users should be aware of data rates. There are maximum number of groups and integrations that each instrument (and APT) allows based on how much data JWST can store. Therefore, results of this tool should always be checked against the documentation and APT. More information can be found at the "JWST Data Rate and Data Volume Limits" JDox page.
3. For NIRCam, it is currently assumed that a 4-amplifier readout is needed. 1-amplifier readouts are currently not supported by this tool, but they are by, e.g., PandExo.
4. NIRSpec/PRISM mode is currently not supported, but we aim to support this mode in future versions.