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JCMT Queue-Based Flexible Guidelines

Guidelines for implementing flexible queue observing

Weather Guidelines

In order to maximise the productivity of the JCMT, the ITAC has approved the concept of flexible scheduling whereby the choice of project observed is determined primarily by the weather conditions and then by the TAG-assigned priority. To facilitate this we identify the range of weather conditions within which each programme allocated time should be pursued. The weather categories adopted, in liason with the Director JCMT, are as follows:

Weather Grade Definition CSO Tau Prime Instrument(s)
1very dryτ < 0.05RxW(D), HARP (>360GHz)
2dry0.05 < τ < 0.08HARP
3medium0.08 < τ < 0.12HARP
4wet0.12 < τ < 0.2HARP, RxA3
5very wet0.2 < τRxA3

Observing by the Dutch and Canadian communities occurs in blocks of several nights in which programs are observed according to the weather and the assigned TAG priorities. The natural flexible nature of this process ensures optimal use of the telescope for those communities. The observer sent by those communities is usually involved in one of the high-priority, good-weather programs.

The arrangements for allocating programs and assigning observers in the UK queue are slightly different - and are explained here - although the general Rules for Operating Flexible Queue Observing apply in all cases.

To PIs in all queues : Upload your MSBs as soon as possible

All successful applicants will be notified of these facts via e-mail from the JCMT Scheduler shortly after each ITAC meeting. Observing templates (MSBs) are required to be submitted for all projects by the end of the first month of each semester - whether applicants are expected to come to the telescope or not. This is because it is useful for MSBs for every PATT-approved programme to be held at the JACH to facilitate flexible observing at any time. MSBs are created and uploaded using the Observing Tool (OT).

Grade-5 proposals

The ITAC wish to encourage A-band heterodyne proposals that can take advantage of Grade-5 conditions.

Contact: Remo Tilanus. Updated: Tue Sep 9 14:47:12 HST 2008

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