As is clear from the above the already allocated OT1p2 observing programmes are part of the pool of 'over-allocation' programmes, which comprises a total of 10 months-worth of observing. In the case where everything is nominal approximately 2 months would be observed, thus approximately 20%. Should the mission lifetime be longer/shorter than the nominal, then this figure would become higher/lower.
However, since only a minor fraction of the OT1p2 observations can reasonably be expected to be executed, the fact that the associated AORs 'block' potential observations from being proposed in OT2 is potentially disadvantageous (and against the adopted policy for Herschel) to the overall science return of the Herschel mission. It has therefore been decided to introduce special provisions for the OT1p2 observing programmes and associated observations as follows:
The AORs associated with the approved OT1p2 observations will not be blocked for OT2 proposals. They will be visible in HROST, but indicated as priority 2.
The original proposer can, but is not under obligation, repropose the OT1p2 observations in OT2. If the OT2 proposal is awarded OT2p1 time the OT1p2 time is lost. In the case some of the observations have already been executed, they will be counted as part of the new proposal time allocation. If the OT2 proposal is not awarded OT2p1 time, the AORs remain as OT1p2 observations. However, see next bullet.
Since the AORs are not blocked it is conceivable that they could be part of a proposal submitted by someone else. If such a proposal is awarded OT2p1 time, the successful proposer will have to share the data with the original OT1p2 proposer. They both get the data equally, and with the same proprietary rights.
It is acknowledged that there may be remaining questions on this matter, and as questions appear in Helpdesk if/when appropriate a supplementary note will be posted on AO Latest News.