Orbit Packing Changes for Cycle 12

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Orbit Packing Changes for Cycle 12

• Tom Donaldson

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Overview

• Orbit Packing Today
• Orbit Packing in APT
• Orbit Packing in Cycle 12 Ops
• Retransing Cycle 12 Proposals
• Retransing Earlier Proposals
• Dependencies
• Wrap-Up

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Orbit Packing Today

• Exposure specifications are defined in .prop
  files using PED or text editor.
• Trans expands the exposure specifications into
  the actual exposures.
• User has no control over individual expanded
  exposures.

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Orbit Packing Today (contd)

• Trans assigns expanded exposures to orbits,
  adjusting their durations to optimize the orbit
  packing.
• The DG displays orbit packing results.
• Viewing the effects of changes to a proposal
  requires rerunning the entire proposal through
  the Preprocessor and Trans.

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Orbit Packing Today PCs and PIs
PC Toolbox
Orbit Packing Actions
PLIB
S/W
User
RPS2

• PED/emacs
• Use .prop file.

• Define exposure specifications.

PP

• Syntax check.

• Expand exposure specs into actual exposures.

Trans

• Compute default durations of expanded exposures.

• Adjust expanded exposure durations for instrument
  constraints.

• Adjust expanded exposure durations for orbit
  packing.

• Assign expanded exposures to orbits.

• View orbit packing.

DG

• Repeat process as needed.

PMDB
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Orbit Packing in APT

• APT will replace RPS2 in cycle 12.
• Exposure specifications will be defined in .xml
  files using APT, not text editor.
• User will be able to specify duration and orbit
  for expanded exposures.
• Trans will not adjust expanded exposure durations
  for orbit packing.
• Orbit Planner will display orbit packing results.
• Viewing the effects of changes to a proposal
  requires only a partial run through Trans.

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Orbit Packing in APT
APT
Orbit Packing Actions
S/W
User

• Define exposure specifications.

APT Proposal Editor

• Syntax check.

• Use .xml file.

• Expand exposure specs into actual exposures.

• Compute default durations of expanded exposures.

• Adjust expanded exposure durations for instrument
  constraints.

Trans
Orbit Planner

• Adjust expanded exposure durations for orbit
  packing.

• Assign expanded exposures to orbits.

• View orbit packing.

• Repeat process as needed.

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Orbit Packing in Cycle 12 Ops

• APT will not replace PC Toolbox in cycle 12.
• .xml file will be primary proposal
  representation, but will be converted to .prop
  for use in Ops.
• .prop files will contain duration and orbit
  number for expanded exposures.
• Changes to proposal need to be made in APT, not
  PED or text editor.

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Orbit Packing in Cycle 12 Ops (contd)

• Trans will adjust expanded exposure durations up
  to 20 to optimize orbit packing (available mid
  cycle 12).

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Orbit Packing in Cycle 12 Ops
PC Toolbox
Orbit Packing Actions
S/W
User

• APT
• Use .xml file.

• Define exposure specifications.

PLIB and PP

• Syntax check.

• Expand exposure specs into actual exposures.

Trans

• Compute default durations of expanded exposures.
  (As specified in APT)

• Adjust expanded exposure durations for instrument
  constraints.

• Adjust expanded exposure durations for orbit
  packing. (Optional)

• Assign expanded exposures to orbits. (As
  specified in APT)

• View orbit packing.

DG

• Repeat process as needed.

PMDB
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Retransing Cycle 12 Proposals

• To minimize manual effort needed to retrans
  proposals, Operational Trans will adjust expanded
  exposure durations up to 20 to optimize orbit
  packing.

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Retransing Earlier Proposals

• Proposal created prior to cycle 12 will not have
  orbit assignments for expanded exposures.
• Without those orbit specifications, Trans cannot
  be guaranteed to recreate the same orbit
  structure it had when the last time it was
  processed.
• We address this with two plans

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Retransing Earlier Proposals Plan A

• Allow Trans to recompute the orbit packing.
• If we dont like the orbit packing it created, we
  could
• Live with using APT to edit the proposal to
  create a better packing.
• When the packing is acceptable except for
  exceeding the orbit allocation, allow the extra
  orbit(s).
• During development, analyze new Trans orbit
  packing to see how much it matches old Trans.

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Retransing Earlier Proposals Plan B (if
analysis shows new Trans orbit packing differs
greatly from that of old Trans)

• Trans could be configured to write a report
  detailing the orbit packing.
• All outstanding proposals could be run through
  that version of Trans to create a record of the
  correct orbit packing.
• That record could then be fed to Trans whenever
  one of those proposals was retransed.

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Dependencies

• This new operational flow depends on development
  in
• Orbit Planner
• APT infrastructure
• Trans
• RPS2
• PC Toolbox
• Most work to complete by mid summer, 2002.
• Currently on schedule.
• Allows time to react if problems come up.
• Operational integration in 4th quarter, 2002.

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Wrap-Up

• The transition to APT will cause significant
  changes to the operational work flow.
• Development and testing will be coordinated with
  the Trans team and the PC team.
• This document is available off the orbit planner
  web page
• http//apst.stsci.edu/apt/apt-orbit-planner/index.
  html

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Orbit Planner Schedule