1. The Long Range Plan: Cycle 17 update September 2009 Dave Adler

2. Current state of the LRP
Instrument
Orbits
WFC3
1941
COS
1235
ACS
543
STIS
544
FGS 87
NIC 96
Total
4446(2)
Cycle
Orbits
15/16
348 17
4013
Total
4361(1)
C16 snaps (NIC) 45
C17 snaps
1338
Total snaps
1383
Visits not in current plan
orbits
unschedulable 81
no plan windows 60
Miscellaneous (ToO, etc)
292
Total not in plan
433
SMOV not included in totals.
Some programs have more than one SI prime.
cycle cycle 17 tail
D. Adler
TIPS – LRP – 17 September 2009

3. How the Operational LRP was built
Cycle 17 runs from August 17, 2009 – Sept 1, 2010
Aimed for 80 orbits/week - historical 3-Gyro average
Resulting plan has orbits/day in the cycle
including “unplanned” visits adds 1.21 orbits/day
11.4 orbits/day  80 orbits/week – full subscription
Cycle 17 tail (post-9/1/10) includes 830 orbits
Early priorities in the LRP - from HSTMO:
SMOV – most pre-cycle, but some planned in cycle
EROs – most pre-cycle
ERS – 2 programs, 214 orbits
finish c15/16 – currently planned: 348 orbits
GTOs early, if possible – ~300 orbits
cals early, as needed
keep programs together when possible
D. Adler
TIPS – LRP – 17 September 2009

4. Why are so many Cycle 17 plan windows late?
Early Cycle 17 issues
SMOV additions/delays caused the start of the cycle to be heavily oversubscribed.
410 orbits of SMOV/science/cals in first three weeks!
Solution pushed some things later in cycle:
some COS, NIC SMOV was delayed
some ERS targets were delayed
some high-priority GO science was delayed
Why are so many Cycle 17 plan windows late?
early priorities forced some C17 GOs to be planned late.
need to account for “unplanned” visits (ToO, HOPRs, etc) throughout the cycle.
some DD demand for early orbits – Jupiter, Comet, LCROSS, etc.
SMOV/ERS-induced “bow-wave” didn’t help issue.
D. Adler
TIPS – LRP – 17 September 2009

5. It could get worse…
Some “unplanned” science is now entering the plan: Chandra-coordinated science (~100 orbits), ToOs, HOPRs, etc.
On-going SI issues require some plan rework:
COS FUV planned for the current time frame could move later.
When NIC is ready for GO science - visits will be pulled forward when possible.
WFC3 “hard” science will soon be enabled.
D. Adler
TIPS – LRP – 17 September 2009

6. …before it gets better
Early results: weekly orbit counts are encouraging
first few post-SMOV flight calendars were packed:
SMS week
SMOV orbits
Sci/Cal orbits
Total
Aug 31 32 63 95
Sep 7 13 76 89
Sep 14 28 91
Sep 21 18 70 88
Caution with these early results:
We’ve not yet been in a northpoint week.
fewer SAA-hiders can schedule, subscription will be lower.
Early-cycle subscription is always higher: greater visit selection; highly-flexible visits are still available.
If high-subscription trend continues:
We can pull visits in the tail earlier.
Will evaluate after northpoint weeks are scheduled.
D. Adler
TIPS – LRP – 17 September 2009