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The Long Range Plan: Cycle 16 update Dave Adler – TIPS September 2007

The Long Range Plan: Cycle 16 update Dave Adler – TIPS September 2007. Outline. Current Cycle 16 LRP vs the Initial LRP Impact of the Sept 1 safing Cycle 16 tail WFPC2 past SM4 Cycle 17 Post-SM4 testing. The Initial Cycle 16 LRP. Released 07.178 (6/27/07) – for the 07190 SMS

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The Long Range Plan: Cycle 16 update Dave Adler – TIPS September 2007

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  1. The Long Range Plan: Cycle 16 updateDave Adler – TIPSSeptember 2007

  2. Outline • Current Cycle 16 LRP vs the Initial LRP • Impact of the Sept 1 safing • Cycle 16 tail • WFPC2 past SM4 • Cycle 17 Post-SM4 testing TIPS 20 September 2007

  3. The Initial Cycle 16 LRP Released 07.178 (6/27/07) – for the 07190 SMS • 4498 total orbits Breakdown by cycle: Cycle 16: 3037 orbits Cycle 15: 1402 orbits Cycle 14: 59 orbits Prime Instrument:* WFPC: 2292 orbits NIC: 1563 orbits ACS: 608 orbits (1) FGS: 216 orbits * -some visits have more than one instrument prime. (1) – 23 orbits HRC/WFC prime not yet converted Not in the LRP: ToOs ~50 orbits Cycle 16 cals: ~ 100 orbits HOPRs (2.5%) ~100 orbits TIPS 20 September 2007

  4. The Current LRP 07253A - visits scheduled through 07.267 (9/23/07) • 3764 total orbits Prime Instrument:* WFPC: 1752 orbits NIC: 1455 orbits ACS: 522 orbits (1) FGS: 193 orbits * -some visits have more than one instrument prime. (1) – 4 orbits HRC/WFC prime not yet converted Breakdown by cycle: Cycle 16: 2773 orbits Cycle 15: 947 orbits Cycle 14: 44 orbits TIPS 20 September 2007

  5. Cycle 16 LRP - progress SM4 TIPS 20 September 2007

  6. Recent calendars • 07239: pre-safing: 75 orbits post-safing: 50 orbits • 07246: pre-safing: 86 orbits post-safing: 66 orbits • 07253: 88 orbits 50% efficiency • 07260: 91 orbits 54% efficiency • 07267: 81 orbits 46% efficiency TIPS 20 September 2007

  7. Current LRP – full through SM4 • SAA-free demanders vs SAA-hiders Total orbits SAA-free demanders SAA-hiders /per day /per day /per day -------------- ------------------------- ------------- Cycle 16: ~2779/ 8.7 1477/ 4.6 1302/ 4.1 (07.267-08.220) Cycle 16 tail: ~877/ 4.1 564/ 2.6 313/ 1.5 (08.220-09.068) • We allocate two orbits/day for “unplanned” visits. • 8.7 + 2 = 10.7 orbits/day = 75 orbits/week. • Slightly more than 2-Gyro average – Cycle 16 is full through SM4. TIPS 20 September 2007

  8. LRP example – hiders, free-demanders SAA-free demander SAA hider Partial SAA hider TIPS 20 September 2007

  9. Current LRP – hiders vs free demanders SM4 8/7/08 SAA-free subscription is low total orbits SAA-free demanders SAA-hiders SAA-hiding subscription is full Cycle 16 tail Cycle 16 (nominal) TIPS 20 September 2007

  10. Plan Flexibility: hiders vs free-demanders Previous Cycles: • majority of programs were SAA-free demanders (which can’t go in SAA-impacted orbits). • fewer SAA-hiders (schedule in SAA-impacted orbits). Cycle 16: • Instrument compliment in Cycle 16 – higher percentage of visits are SAA-hiders. Since SAA-hiders can schedule in SAA-free orbits, Cycle 16 has more scheduling flexibility. TIPS 20 September 2007

  11. Current plan – northpoint weeks Weekly subscription depends on timing of northpoint TIPS 20 September 2007

  12. 2-Gyro orbit counts 2-gyro average – 73.5 orbits/week 3-gyro average (Cycles 12/13) – 81 orb/week TIPS 20 September 2007

  13. Impact of the recent safing • Gyro failure at 243:23. • Science recovery at 246:00; 25 orbits “lost.” • NIC safing at 245:02. • NIC science pulled off the 07246 SMS; net “loss” of 20 orbits. • No science visits lost. • all 45 orbits were rescheduled on the 07246, 07253, and 07260 SMSes, or replanned for the next few weeks. TIPS 20 September 2007

  14. Cycle 16 tail The LRP > 08.255 (9/10/08: original SM4 date) • No Cycle 15 (or earlier) programs • No ACS contingency programs • No WFPC2 prime programs • Only one WFPC2 parallel program – 75 orbits – can’t move earlier without oversubscribing other regions. • Some programs can be pulled forward if subscription in the target region is low (i.e., “unplanned” visits haven’t used it) and the program constraints allow it. TIPS 20 September 2007

  15. WFPC2 beyond SM4 • One Cycle 15/ACS contingency program visit (2 orb) has moved passed SM4 due to guide star problems. • With Neill Reid and Ken Sembach, used the following criteria to decide which WFPC2 to move forward: • Programs that will be less than 10% complete at SM4: • leave post-SM4 visits alone; they will be converted to WFC3. • Programs greater than 90% complete at SM4: • leave post-SM4 orbits alone; program will be considered complete. PI can appeal for reinstatement of orbits to TTRB. • Programs between 10-90% complete at SM4: • move forward if possible. Moved 36 orbits forward; 132 orbits from 11 programs remain. TIPS 20 September 2007

  16. Cycle 16: End of Cycle Details • Instrument breakdown: Notes: * programs with plan windows ending in the specified region. (1) 24 orbits have both WFPC and SBC prime. TIPS 20 September 2007

  17. Cycle 16: End of Cycle Details • Large Programs: TIPS 20 September 2007

  18. Cycle 17 Post-SM4 testing Goal: Demonstrate that the ground system functions on a representative sample of post-SM4 HST proposals in 3-Gyro mode: • Proposal creation • Proposal implementation • Long Range Plan generation • Weekly science schedule generation • SMS generation • Mission Schedule/Command Load generation TIPS 20 September 2007

  19. Cycle 17 Post-SM4 testing: LRP • 3-Gyro OBAD mode • 830 external orbits: • 220 COS • 375 WFC3 • 225 NIC, ACS, STIS, FGS • Restricted to 07.260-07.330 – most visits schedulable over full time frame. • Artificially restricted Plan Windows to provide a good mix of visits for each test calendar. Result: Spike worked fine. Distribution of SAA-hiders and free-demanders is representative of a typical operational LRP. TIPS 20 September 2007

  20. Cycle 17 Post-SM4 testing: Scheduling • Added science visits to a candidate list, scheduled them. • Scheduled snaps using the normal process. • Scheduled parallel observations. • Selected guide stars. • Ran “non-continuity” (stand-alone) Science Mission Specifications (SMS). Results: Calendars with 80-90 orbits/week. SPSS and SMS generation worked fine; no functional issues identified in these systems with new instruments. TIPS 20 September 2007

  21. Cycle 17 Post-SM4 testing: Upcoming work • Generate LRP reports • Pending ASSIST DB updates. • Build “non-continuity” schedules, SMSes for the remainder of the weeks in the DRM LRP. • Generate Mission Schedules/Command Loads • Report “final” status at DRM Working Group meeting on October 17 • Report identified problems/liens • Determine need for additional exercises TIPS 20 September 2007

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