JWST Science

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JWST Science Operations Center Status
JWST-PRES-012925

• David Hunter
• Kathryn Flanagan
• Massimo Stiavelli
• May 20, 2009

Space Telescope Science Institute
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Overview

• SOC Development Status
• Mission Level Architecture
• Systems Engineering
• Proposal and Planning System
• Commanding
• WFSC Software
• Project Reference Database
• Integration Test
• Science Instrument Telescope Support
• Interface with the User Community

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New Staff

• We would like to welcome two new scientists to
  support CSAs FGS/TFI
• Andre Martel and Kevin Volk have recently joined
  Alex Fullerton and Pierre Chayer at STScI

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JWST Science and Operations Center
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Mission Level Architecture

• Data volume and data compression studies -
  Structured noise from the detectors renders the
  data poorly compressible with the current
  compression algorithm
• Updated Science Operations - Design Reference
  Mission for data volume analysis results
  justified requirement for 458 gbits/day
• Participated in evaluation of possible solutions
• Resolution has been achieved through an increased
  number of contacts
• Studying a high compression software solution
  that will be discussed in a splinter session at
  0900 on Friday (Ballroom)
• Moment of Inertia - high inertia increases slew
  times and decreases efficiency
• Participated in review of various slew algorithms
  which use current momentum magnitude or state and
  various approximations of RWA capacity to select
  or compute slew parameters
• Ensured consideration of operations efficiency
• Momentum Management - a challenging problem now
  resolved and incorporated into requirements and
  design
• Incorporated new requirements into the SOC,
  including On-board Scripts requirements for
  autonomous momentum management
• Revision C of the Mission Operations Concept
  Document

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SOC Systems Engineering

• Flight Operations Subsystem
• Completed all Flight Operations System component
  requirements walkthroughs.
• Telemetry Analysis and Trending System (TATS) and
  the Data Warehouse Handler (DWH) Mar 25.
• FOS Operations Concept presentation Mar 25
• FOS Planning System (FPS), Monitoring and
  Notification Executive (MANE), Batch Telemetry
  System (BTS), and Recorded Data handler (RDH)
  Dec 8-9
• Finishing the FOS Requirements Document.
• Data Management System
• Coordinated joint DMS work between HST and JWST
  on porting STDADS to Linux enabling an early
  start on the demo version of the JWST IT Data
  Archive. See splinter session - Friday at 900
• Continued work on the DMS Operations Concept.

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Proposal and Planning Subsystem

• Conducted the first of three PPS System Design
  Reviews on March 15, 2009
• Issued first version of the PPS Design Document.
• PPS Hardware
• Conducted several reviews of PPS development,
  IT, OPS hardware including JWST and HST review
  of IT/OPS Common Hardware.
• Completed set up of the development environment
  and began work on the IT environment.
• Moving Targets
• Began developing moving target requirements
  including the moving target chapter of the
  proposal instructions.

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Proposal and Planning Subsystem
Chapter Last Reviewed Version
1. Introduction, 6. Parallel Calibrations, 8 Patterns and Mosaics, 22 TFI Coronagraphy, Not Written Yet
2. The Basics of Proposals 1/6/09 - Version 2
3. Fixed and Generic Targets 1/09/09 Version 4
4. Solar System Targets 2/09/09 - version 1
5. Observations 1/7/09 Version 4
7. Special Requirements 12/18/08 Version 4
9. MIRI Imaging 1/09/09 Version 5
10. MIRI Low Res. Spectroscopy 1/09/09 Version 4
11. MIRI Med. Res Spectroscopy 1/09/09 Version 4
12. MIRI Coronagraphic Imaging 1/09/09 Version 3
13. MIRI Engineering 12/22/08 Version 2
14. NIRCam Imaging 12/15/08 Version 1
15. NIRCam Coronagraphic Imaging 12/15/08 Version 1
16. NIRCam Engineering 1/07/09 Version 3
17. NIRSpec Fixed Slit 1/19/09 Version 2
18. NIRSpec IFU 1/19/09 Version 2
19. NIRSpec MOS 1/19/09 Version 2
20. NIRSpec Engineering 1/19/09 Version 2
21. TFI Imaging 1/30/09 - Version 2
23. TFI Engineering 1/30/09 - Version 2

• Level 5 Requirements - Proposal Instructions
• 19 chapters and 5 appendices in various stages of
  review 211 pages

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Proposal and Planning Subsystem

• Astronomers Proposal Tools
• Released an alpha version (Build 1) of the
  initial set of MIRI NIRCam templates in Nov,
  2008. APT 17.4 entered component testing in
  February 2009 and has been released.
• The HST version 17.4 of APT contains the initial
  JWST MIRI and NIRCam templates.
• NIRSpec and TFI template development continues.
  These will be incorporated in version 17.5 of APT
  that should be released in September.

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Proposal and Planning Subsystem

• PPS Constraint Generator
• Continued integrating the JWST constraint library
  Build 1, and Guide Stars Build 1, into the PCG
  code.
• JWST Constraint Library
• Completed Science Instrument Aperture Coordinate
  conversions, Phase constraint, Roll to Time and
  Time to Roll conversions, Link-set Propagator
  integration
• Started study of Signal to Noise constraint
• Guide Stars Catalog
• Continued to augment Guide Star Catalog II with
  the 2MASS objects
• Visit Scheduling System
• Design of the command line interface has begun
• Development of the VSS architecture has begun
• Design of the VSS to PPS component interfaces
  continued as did design of the VSS to SOC
  subsystems interfaces

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SI Script Implementation Status
Common Scripts Completed Target Locate
Scripts Enhanced Dictionary Interface Scripts

NIRCam
NIRSpec
MIRI
TFI
FGS
Began Engineering Test Definitions
Completed Bright Object Readout Patterns Began
engineering test discussions
Completed the guiding high level scripts Began
discussions on Imaging, Darks, Flats
Began work on target acquisition Have
coronography ops concept
Completed Target Acq II and Subarrays II Began
implementation of Reconfigurations
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Other Commanding Highlights

• Observation Plan Executive (OPE)
• Updated level 5 requirements and design
• Addressed HGA management, momentum management,
  visit exit, and fault management
• OSS Certification
• Started using the Certification Lab for MIRI,
  NIRSpec, and NIRCam unit testing
• Moving Targets
• Drafted new OSS level 4 requirements
• Observation Plan Generation System (OPGS)
• Completed High Level Design
• Created level 5 requirements and Implemented code
  for
• OPGS user interface parameter verification,
  Observation Plan Segment file and Visit file
  generation from a Short Term Schedule for the
  MIRI templates. Can execute visit end to end!
• Supported Science Instrument Proposal Template
  definitions
• Delivered APT template related requirements to
  developers
• Produced OPGS build schedule with APT VSS
  dependencies

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ISIM Flight Software Support

• ISIM Flight Software
• Coordinated the ISIM Test (IC10) PRD and ISIM ETU
  (IC10.3) PRD deliveries from ISIM and SI teams
• Participated in ISIM fsw IC10/11 test plan, code,
  and test result reviews
• Supported Data Acquisition Flight Software Fault
  Management requirements definition
• IGSS ISIM Commanding Tools
• Delivered upgrade to ADExecute and RTSBuild tool

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WFSC Software Subsystem

• Conducted a very successful PDA with Ball in
  January - a simultaneous PDA of two Ball
  components (WAS, MCS) with one STScI component
  (WEx).
• Collaborating very effectively with Ball on WSS
  design
• Agreed on the details for most of the WSS IRCD
  control section
• Agreed on PRD content for the Mirror Calibration
  Data for the Mirror Control Software
• Agreed on overall plan for Wavefront Analysis
  Software PRD content
• Developed plan for updating and managing
  WSS-specific PRD content
• Delivered a draft of the WSS VV plan
• Supported the Wavefront Algorithms Delta review
• Reviewed Multi-Instrument, Multi-Field Alignment
  additions to the Wavefront Algorithms
• No impact on the WEx Software
• Requires updates to other SOC subsystems and
  additions to WSS VV

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WFSC Software Subsystem

• Working with Ball and the STScI Telescope Team on
  WFSC Operations
• Reviewed Proposal and Planning systems concepts
  and plans for WFSC
• Discussed plans for NIRCam calibration and data
  formats
• Discussed the limits of hexapod movement with an
  impaired or failed actuator (procedures, poses)
• Explored approaches to modeling the effect of
  actuator failure on ability to improve PSF

Simulated data with 4 waves weak defocus
lensleft individual read (w/ cosmic rays bad
pixels)right count rate image (cosmic-ray
corrected,but bad pixels remain)
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WSFC Software Subsystem (WSS)
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PRD Management Office Web Site

• New PRD Management Office web site announced
  March 5
• This site utilizes CR System authentication and
  allows timely updates (without a software change
  as with the CR System)
• Site provides PRD schedule and other PRD
  documents, PRD Utilities and Tools, CCB
  materials, Working Group minutes and links for
  the most used CR System pages

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New PRD Verification Report
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New PRD Verification Report

• Organized by data type, each expandable
  collapsible
• Summary and info link provided for each check
• Errors (red) and warnings (yellow) indicated by
  color and expanded by default
• This report will be deployed via the PRDMO web
  site for teams to use locally

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Project Reference Database Software has truly
reached a maintenance stage

• PRDS 3.7 for Change Request System and PRD
  Toolkit
• Delivered Nov. 7 and deployed to CR System Nov.
  12
• Resolved critical performance issue with
  certification report
• PRDS 3.8 for Change Request System and PRD
  Toolkit
• Delivered Feb. 27 and deployed to CR System Mar.
  4
• Provided Automated Auditing Report, a CR
  Verification State, Missing Children XREF Report,
  and new login page for CR System as well as Java
  conversion of macros and JWST logo for Toolkit
• PRDS team completed review of outstanding PRs
• Incorporated this into content schedule for
  software delivery in June, a maintenance update
  for the toolkit and CR System
• Planning for fall software release, too
• Software performance tests with large databases
• Tests show CR System and PRD Toolkit ably handle
  database with 26000 data items, which exceeds
  size requirements by 30

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PRD Toolkit Version Control System Performance
Tests using JLAB77
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Database Releases

• Initiated IITS Development PRD in December
• PRDDEVIITS-D-001 initial publication March 10
• PRDDEVIITS-D-002 published March 30 for ETU
  testing at GSFC
• With the contributions from the SI teams, the PRD
  has more than doubled in size since 2008 to
  nearly 17,000 data items
• More information will be available in the 200
  Mission Operations Working Group - Andy Groeber
  presenting.

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Ground Segment IT

• Ground Segment Verification and Validation
  Planning
• Prepared detailed set of verification
  descriptions for all requirements in the GSRD and
  SOC to Institutional Systems IRCD
• STScI is an active participant in JSC Test
  Planning (via JTAG Working Group)
• Provided draft Test Information Sheets (TISs) for
  Ground tests at JSC
• Simulators - Spent significant effort working
  simulator requirements
• Participated in the Observatory Test Bed (OTB)
  requirements development and review with NGAS
  (October, 2008 March, 2009)
• Prepared requirements for a software telemetry
  simulator, which is needed for Flight Ops Team
  (FOT) training

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SOC Element IT

• SOC IT Planning
• Developed preliminary architecture diagrams for
  the SOC IT environment
• SOC Build/Release Plan being formalized with
  development teams
• SOC Subsystem IT
• Completed a draft of the WSS Verification Plan
• Developed numerous test cases verification
  methods and descriptions for FOS Level 4
  requirements
• Overall Ground and SOC verification status
  captured in chart on next page summarizes Ground
  and SOC verification status

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Webb Instrument Team (WIT)

• Input to SOC development
• Operations Development (Operations Working
  Groups)
• Determine how instrument operations will be
  conducted providing input to the On-board Scripts
  (dithering, engineering functions activities and
  sub-arrays)
• OWG Contacts Chen (MIRI),Tumlinson (NIRSpec),
  Sahu (NIRCam), Chayer (Guider), Fullerton (TFI)
• Proposal Planning System Support
• Provide input to instrument templates in
  conjunction with the Operations Working Groups -
  proposal instructions
• Assisted with MSA planning tool studies and
  simulations
• GSCII characterization of limitations and
  beginning improvements

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WIT - Calibration

• Calibration Development (Calibration Working
  Groups)
• Collaborative effort with SI Teams, and STScI
  Calibration Software developers.
• Outlining high level architecture requirements
  for science data processing.
• Considering potential for (some) commonality
  across instruments given the similarity of the
  detectors
• Learning software from SI teams for ground test
  data processing
• Started devising best algorithms with SI teams
• Collecting data for absolute calibration
  standards for JWST
• Contacts Gordon (MIRI), Beck (NIRSpec), Robberto
  (NIRCam), Chayer (Guider), Volk (TFI)
• Held successful Calibration Summit at STScI
  (March 31 - April 1)
• SI teams provided critical input to pipeline
  development at STScI
• Addressed data processing steps, ground tests,
  science calibration, SI team software
• Splinters on IT data archives, detector data
  processing steps, visualization, and ITAR

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WIT - ISIM and Instrument Support

• ISIM and SI direct support
• ISIM thermal and power operations scenario study
  (Meixner)
• OSIM support (Friedman)
• Attendance of ISIM CDR (many)
• Support for Exoplanet science (Sahu)
• Evaluating data compression Issues (Regan
  Isaacs)
• Line of Sight Working Group (Nelan)
• NIRSpec CDR T. Beck on panel review, M.
  Stiavelli on CDR board
• IT Support of instrument engineering test unit
  tests
• Support for MIRI VM2 data analysis and debriefs
• Support for NIRSpec DM testing
• Discussions with other SI teams regarding future
  support

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Telescope Team Optics Hardware, IT

• OTE CoC Test (ambient test GSFC/SSDIF 2011)
• Test development, metrology, interferometry
• Multiwave-Interferometer (MWIF) (GSFC Testbed for
  JSC IF)
• Hardware troubleshooting, coarse alignment of
  parabolas, null-lens calibration mirror,
  co-phasing using MWIF still to start
• Backplane Test (cryo test GSFC/SES 2010)
• Refined IRCD for Test Facility use
• OSIM Development (Optical simulator for ISIM IT)
  
• G. Hartig was Panel member in Design Review and
  has extensively participated in teleconsTIMs
  regarding overall design
• NIRCam Development/Modeling
• Hartig and Upton participated in Tiger Team to
  investigate WFE in NIRCam Pathfinder
• Performed optical tolerancing analysis and
  Monte-Carlo simulations
• Started analysis of ghosting with and without
  coatings, and WFSC impact
• Extensive communication about optics alignment
  and test plans

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Telescope Team WFSC

• WFSC Algorithms
• Participated in Algorithm Closure Delta-Review
• Multi-Instrument Multi-Field Alignment (MIMFA)
• Developed Hybrid Diversity Algorithm software at
  STScI
• WFSC Software Subsystem (WSS)
• Involved in ongoing WSS development
• Analyzed impact of failed actuators on image
  quality
• WFSC target star isolation requirements
• Investigated how the requirements on target star
  isolation affect availability
• Argued for looser isolation requirements (adopted
  in Ball change requests)
• Sub-array size for in-focus WFS images may need
  to be increased to establish absence of faint
  companion stars

• Available target stars for WFSC maintenanceif
  isolation to ?mag 7 is requested out to 1
  (top) or 0.5 (bottom) arcmin, respectively.

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Telescope Team Optics Modeling and Data
Simulation

• Linear Optical Control Model ZEMAXMATLAB (Upton)
  
• Report on mirror control, degrees-of-freedom, and
  degeneracies
• Evaluated impact of mirror segment edges
  (Upton/Makidon)
• Studied impact of imperfect mirror segment edges
  on image quality with telescope model in FRED
  software
• Increased prominence of diffraction spikes
  unlikely to affect science
• JWPSF Software (Soummer/Makidon)
• Upgrading STScI JWPSF software to allow
  predictions for MIRI coronagraph observations
• Simulated data for scripts testing (Anderson)
• Created software to generate simulated data for
  testing of target acquisition scripts
• Includes coronagraphic mask effect on PSF
• Dithered Data (Anderson)
• Procedure developed for possible dithered data
  combination by WSS
• Background Light and Proposal Planning System
  (Kinzel, )
• Study ongoing to address extent to which PPS (and
  ETC) need to understand predicted S/N, and which
  sources must be modeled (zodiacal light, earth,
  moon, Galaxy .)
• Working to improve Zodiacal light model for
  scattered light analysis

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JWST AAS Town Hall Meeting

• Very successful
• Hosted by Northrop Grumman
• Several hundred participants
• Speakers
• Jon Arenberg
• Kathryn Flanagan
• Alan Dressler

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JWST Advisory Committee (JSTAC)

• A JWST Advisory Committee (JSTAC) has been
  created to advise the STScI Director, Matt
  Mountain, on the optimum strategies and
  priorities for JWST operations. The goal is to
  maximize scientific productivity for the General
  Observer from day 1.
• The JSTAC will advise on
• implementation of observing policies
• prioritization of capabilities offered at launch
  (including archive, data analysis tools and
  observing modes)
• readiness of the SOC.

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JSTAC - continued
JSTAC Committee Members Garth Illingworth
(Chair) UCSC/UC Observatories/Lick
Observatory Roberto Abraham University of
Toronto Neta Bahcall Princeton University Stefi
Baum Rochester Institute of Technology Roger
Brissenden Harvard-Smithsonian Center for
Astrophysics Tim Heckman Johns Hopkins
University Malcolm Longair University of
Cambridge Chris McKee University of California,
Berkeley Bradley Peterson Ohio State
University Sara Seager Massachusetts Institute
of Technology Lisa Storri-Lombardi California
Institute of Technology Joe Rothenberg Universal
Space Network Monica Tosi Osservatorio
Astronomico di Bologna Committee Ex-officio
Representatives Eric Smith NASA Fabio Favata
ESA David Kendall or delegate CSA John
Mather JWST Senior Project Scientist
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Science Community Input

• Closer to launch we will form a Users Committee.
• We are planning science workshops to help inform
  decisions regarding the optimal mix of Legacy,
  large and small programs for JWST.
• Proceedings of the Tucson JWST conference are out
  and available off the web. Download at
  www.springerlink.com/content/978-1-4020-9456-9

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Webb Science Planning Timeline (CY)
AAS Town Hall
JWST Workshop
JSTAC formed
1st Data Challenge (TBR)
Description of performance
PDR/NAR
Advice of community has maximum leverage
2008
2009
2007
2006
GTO Programs submitted
Cycle 2 Call for Proposals
2nd Data Challenge (TBR)
Users Committee
Cycle 2
(Beta) Exposure Time Calculators
Call for Proposals
JSTAC advises on how to best enable GO science
gt9 months
GTO GO Cycle 1
12 months
6 months
2010
2011
2012
2013
2014
Science Operations
Science Workshops
Launch
The Call for Proposals will describe the
science program GTO programs, GO/GTO split,
Legacy/Key/Large program guidelines, etc.
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JWST Operations Development

• Work on JWST operational tools is in full swing
  at STScI. The look and feel of JWST will be very
  similar to that of HST.
• The Astronomers Proposal Tool (APT) will be used
  for JWST Phase I and Phase II program submission.
  MIRI and NIRCam templates were released with APT
  in April for the user community to try! Download
  it at www.stsci.edu/hst/proposing/apt - Massmo
  Stiavelli
• Additional tools will be available. For example,
  as seen in the next slides Tom Donaldson
• The NIRSpec planning tool for optimizing the
  microshutter array using existing NIRCam or ACS
  images, for example.
• Mosaic tool for defining mosaics

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JWST Templates Released in APT

• APT 17.4 released on 4/9/09 for HST support
• Includes JWST proposal support with MIRI and
  NIRCam templates

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NIRSpec Micro-shutter Array
Microshutters measure 0.2 by 0.4 arcsecs,
arranged on 4 grids. The array is configurable to
allow spectra of 100 distinct sources
simultaneously.
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Using the Microshutter Array The NIRSpec
Planning tool
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Prototyped NIRSpec Planning Tool
We have built operational prototypes of a tool to
simplify the daunting task of selecting which
shutters to open to obtain spectra with the
NIRSpec Micro Shutter Array.
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Mosaic Tool
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Mosaic Tool
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Splinters of special interest

• Commissioning
• Thursday 2 PM in Laurier
• Data Compression
• Friday 9 AM in Ballroom
• Ground Segment IT
• Friday 9 AM in Laurier
• Mission Operations Working Group
• Wednesday 2 PM in Drawing