Mission Engineering and
Science Analysis (MESA)
What is MESA?
Jeff Valenti
2012 Instruments Division Reorganization
Cross Mission
JWST
HST
RIAB
RIAB
TEL
TEL
WIT
MESA
NIRCam
COS/STIS
COS/STIS
NIRSpec
ACS
ACS
NIRISS
WFC3
WFC3
MIRI
before
after “WIT split”
We still use “WIT” to refer to JWST teams + MESA (+ TEL)
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Purpose of MESA
Home of Instrument Engineers
Home of Operations Detector Lab (ODL)
Cross-instrument experiments and analysis
Encourage cross-instrument consistency
Build on foundation established by WIT
Coordinate WIT working groups
Facilitate communication between scientists
and engineers at STScI
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MESA Originally Included Instrument Engineers
Tom Wheeler
Chris Long
Dave Hickey
Audrey DiFelice
John Bacinski
Moved to new Flight Operations Branch (FOB)
Steve Vaclavik, Wayne Baggett, Ray Wright, ...
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Eddie
Bergeron
Mike
MESA
Lou
Strolger
Rachel
Anderson
Rossy
Diaz
(MIRI)
Van
Dixon
Doug
Long
Bria
n
York
(NIRISS)
Harry
(SMO)
Bill
Blair
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Customary to show a picture of the instrument...
SM 2
SM 1
MESA “Instrument”
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And the important components inside...
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WIT Working Group Concept
Participants
Representative from each WIT instrument group
Lead from WIT, not necessarily MESA
Engineers, once science concept is formulated
Nominal process (still evolving)
WG scientists meet and converge on science concept
WG solicits comments from engineers and entire WIT
WG lead finalizes recommendations
Engineers develop engineering concept
WG meets with engineers to finalize unified concept
Engineers generate requirements/PRs
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WIT Working Group Domains
I&T
Coordinate INS support for ISIM ground tests
ETC
Fundamental equations, Observing strategies,
Science concept for interface (SCAMP)
Proposal
Proximity targets, Mosaic tool, Observing template
complexity, User support
Operations
Coordinate instrument operations working groups,
Support onboard script development schedule
Calibration
Calibration algorithms, Commissioning activities
Pipeline
Pipeline specification and testing, Data products
SID Archive Gather metadata, Prepare data, User interface
Efficiency
SODRM, Mechanism use, Overheads, Data
volume
Coronagraphy, Backgrounds, Exoplanets, ...
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WIT Working Group Scientists
https://confluence.stsci.edu/display/JWST/MESA+Working+Groups
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What about Hubble?
HST work in MESA
ETC, CDBS/CRDS [Rossy]
WFC3 pipeline, HLA source catalogs [Lou]
Cross-Instrument working groups
Astrodrizzle
Enhanced spectroscopy products [Alessandra]
Astrometry?
Cross-Mission Projects
CDBS  CRDS (reference files/data)
OPUS  OWL (workflow manager based on Condor)
Define system based on JWST needs and new technology
Implement first for HST, retire risks for JWST deployment
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