Chapter 2:
Special Considerations
for Cycle 17
2.1 ACS Repair During SM4
2.2 Dithering in Cycle 17
Three-Gyro Guiding
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We anticipate that all HST observations in Cycle 17 will be undertaken in the Three-Gyro Science Mode, providing greater scheduling flexibility and greater sky coverage (at any epoch) than in Cycles 14, 15 and 16. Proposers should plan their observations accordingly, using the Target Availability Table in the Primer (Table 6.1) and the visibility tools on the HST Phase I Proposal Roadmap Web site.
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