Queue Summary : Semester 2021A GS

The queues shown in the tables below summarise the programs that have been awarded time on GS. Jump directly to the queue for:

• Gemini South: band 1, 2, 3 (and previous semester band 1 rollover: 2020A, 2020B)

The queue is constructed by the International TAC from the ranked list of proposals of each National TAC using the merging sequence and is divided into three scientific ranking bands (SRBs). Joint proposals (submitted to more than one NTAC for joint support) were combined by the ITAC, are shown in the table as a single entry and are executed as such. Several proposals have multiple occurrences as they were sub-divided by the relevant NTAC; each component is executed separately.

Within each band, all proposals are assumed to have equal scientific merit and have been sorted by PI name for convenience. The choice of which observation within which program to execute next depends on the match to current observing conditions, the balance of each partner's usage and other factors such as future accessibility, whether a program has been started etc. (see a detailed discussion in Puxley 1997; Gemini Preprint #19). The aim is to exhaust band 1 (highest ranked) programs before moving onto band 2 and so on. An observation in band 1 that does not require the best conditions will nevertheless be executed in preference to a band 2 observation even if the latter is a better match. Thus the likelihood of execution decreases from band 1 through to band 3. Bands 1 through 3 aim to fill the nominal queue time available (excluding weather loss). Hence programs in band 3 overfill the queue and provide flexibility with respect to weather conditions and foreseen or unforeseen problems.

This report is generated daily (see the bottom of the page for the current timestamp). The pages linked via Completion Status are updated approximately every 4 hours. Note that the completion fraction may change as the time accounting is adjusted during the quality assessment process.

Note that individual SRBs will not be in detailed balance with respect to partner shares. Aggregating over two or more bands generally provides an equitable distribution of queue loading (in hours, not in the number of proposals) once any classically-scheduled programs are taken into account. Additional flexibility is available when executing observations to balance the partner usage of time. The intent is to achieve balance over 2 or 3 semesters, not a single semester.

The assigned support staff (Gemini Contact Scientists and National Office staff) for each Gemini North ODB and Gemini South ODB program are listed in the interactive 'snapshots' of the Observing Database (ODB).

Last updated on: 22 Apr 2021 12:47:50 GMT