9.3 Special Requirements

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

List and justify any special scheduling requirements, including requests for:

• Target of Opportunity (TOO) observations. For TOO observations, estimate the TOO's probability of occurrence during Cycle 13, and state how soon HST must begin observing after the occurrence (see Section 4.1.2).
• CVZ observations (see Section 4.1.1).
• Shadow time or Low-sky observations (see Section 5.5 of the HST Primer).
• Time-critical observations (see Section 4.1.5).
• Early acquisition observations (see Section 5.2.1 of the HST Primer).
• Coordinated Parallel (CPAR) or Pure Parallel (PPAR) observations
• Target acquisitions that use the 'Reuse target offset' function (see Section 5.2.2 of the HST Primer).
• Real-time interactions (see Section 4.1.6, and Section 2.6.1 of the HST Primer).
• Scheduling of STIS/MAMA and STIS/CCD observations (other than target acquisitions) in the same visit (see Section 6.2.3 of the HST Primer).
• Scheduling of coronagraphic observations in the same orbit with a roll of the spacecraft between observations (see Section 6.2.3 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).

Also, if applicable, discuss the benefits of or need for a non-default proprietary period request (see Section 5.1 and Section 8.7).