GeminiFocus October 2017 | Page 23

For all these reasons, and with the approach of Large Synoptic Survey Telescope (LSST) operations (and the likely sea of change in time-domain and transient astronomy that it will bring), the time has come to step back and rethink/redesign the OCS, and we’ve started a project to do that. As the Observing Database (ODB) lies at the heart of it all, we made it an early candidate for replacement; we are now progressing on a modern Postgres SQL database design to replace the current bespoke database, and a new web-based Sequence Executor (seqex- ec) to go with it. Along with these changes, we’re developing a new “sequence model” (which represents the detailed observing se- quence within the OT), as the current model is overcomplicated and the source of many maintenance headaches. We plan to deploy the new database with the new seqexec in early 2018; this will be usable with FLAMINGOS-2 and the Gemini Multi-Object Spectrograph, and may also enable some tests of on-the-fly scheduling typical of what the LSST will need once it be- comes operational. For proposal submission, observation prep- aration, and program monitoring, we an- ticipate a set of interconnected web-based tools to replace the current large download- able packages. We will absolutely not simply Figure 7. The new seqexec, currently under development, running in a web browser. 21 GeminiFocus October 2017