6.1 Parallel Science Limitations
These restrictions are to ensure that parallels can be scheduled and executed safely and efficiently:
- Parallel observations have some special restrictions on the targets that may be specified; see 6.2Pure Parallels and 6.3Coordinated Parallels for details.
- All scheduling constraints (pointing, orientation, and relative timing) that apply to coordinated primaries and parallels must be specified only on the primary exposure.
- No visit-level special requirements, and only a few exposure-level special requirements, are applicable to pure parallel visits.
- Exposures parallel with any instrument mode which permits interactive or autonomous motion of HST (e.g., interactive or onboard acquisitions) are not supported.
- Neither parallel exposures nor the primary of a coordinated parallel may have real-time (i.e., TDRS contact) requirements of any kind.
- Parallel observations may not be made while STIS MAMA TIME-TAG observations are being made.
These limitations are discussed further below.
