9.3 Special Requirements

(This item is required only for GO and SNAP proposals)

List and justify any special scheduling requirements, including:

•

For Target of Opportunity (ToO) observations (see Section 4.1.2), estimate the probability of occurrence during Cycle 21, specify whether long-term status is requested, identify whether the ToOs are disruptive or non-disruptive, and state clearly how soon HST must begin observing after the formal activation.

•	CVZ observations (see Section 4.1.1).

•	Time-critical observations (see Section 4.1.6).

•	Early acquisition observations (see Section 5.2.1 of the HST Primer).

•	Coordinated Parallel (CPAR) observations (see Section 4.2.1).

•	Target acquisitions that use the ‘Re-use target offset’ function (see Section 5.2.2 of the HST Primer).

•	Scheduling of STIS/MAMA and STIS/CCD observations (other than target acquisitions) in the same visit (see Section 6.2.2 of the HST Primer).

•	Requests for expedited data access (see Section 7.2 of the HST Primer).

•	Other special scheduling requirements (e.g., requests for non-SAA impacted observations).

If applicable, discuss the need for a non-default proprietary period request (see Section 5.1 and Section 8.7).

If your proposal (either GO or AR) uses a mixture of UV and optical/IR observations and you wish to claim the benefit of the UV Initiative (see Section 6.3), justify why the UV component of your proposal is essential to the science investigation.