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Data Management Subsystem. Jeff Valenti (STScI). DMS Context. Mission. JWST. Subsystem. PRDS - Project Reference Database. Segment. Ground Segment. PPS - Proposal and Planning. Element. OSS - Operations Scripts. Science & Operations Center. FOS - Flight Operations.

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Presentation Transcript
slide1

Data Management Subsystem

Jeff Valenti (STScI)

dms context
DMS Context

Mission

JWST

Subsystem

PRDS - Project Reference Database

Segment

Ground Segment

PPS- Proposal and Planning

Element

OSS - Operations Scripts

Science & Operations Center

FOS - Flight Operations

DMS-Data Management

WSS - WFS&C Software

science data flow the big picture
Science Data Flow - The Big Picture

Element

Focal

Plane

Array

Application

Specific

Integrated

Circuit

Focal

Plane

Electronics

Focal

Plane

Array

Processor

ISIM

Solid

State

Recorder

High

Gain

Antenna

Spacecraft

Segment

Observatory

Ground

Deep

Space

Network

NASA

Integrated

Services

Network

Common

Systems

Flight

Operations

Subsystem

Data

Management

Subsystem

Science &

Operations

Center

what is the dms
What is the DMS?

“The DMS provides the data processing, archive, catalog, calibration, distribution and analysis functions required to support the science program and maintenance of Observatory performance.”

Ground Segment Requirements Document

(JWST-RQMT-1056, Level 2)

slide9

Level 0 Recorded Science Data

Level 1 Raw Exposure Data

Level 2 Count Rate Images

Level 4 Combined Science Exposures

Level 3 Processed Science Exposures

Reference File Server

DMS Data Flow

Pipeline Executive (and OTFR)

FOS

Calibration Metadata Creation

Recorded Science Data Unpacking

Science Header Creation

Recorded Science Data Collection

0

Science Data Ingest

Up-The-Ramp Processing

Science Header Update

Calibration Metadata Update

OTFR 1

Backup Manager

Science Header Update

Calibration Metadata Update

Science Exposure Processing

OTFR 2

Science Archive Interface

Science Header Update

Calibration Metadata Update

Science Exposure Combination

OTFR 3

Calibration Data Processing

Science Header Service

Calibration Reference Database

Science Data Pipeline

Reference File Creation

Science Data Archive

PPS / DS

FOS / EDW

jeff s rule for dms design
Jeff’s Rule for DMS Design

Reusing the Hubble DMS design and tools will usually be easier and faster (and hence cheaper) than creating new tools.

reasons to modify hst dms
Reasons to Modify HST DMS
  • JWST requirements not met by HST DMS design
    • New modes, e.g. automatically extract multi-object spectra
    • New data models, e.g. engineering data warehouse
    • More data, e.g. can we routinely distribute raw exposure data?
  • Component of HST DMS will become obsolete
    • Rewrite synphot in Python because SPP is obsolete [in progress]
  • Reduce overall cost of operating JWST
    • Automatic calibration data processing (e.g., dark processing)
    • Update science headers and calibration metadata via server
  • Improve value of data products and services
    • Source lists, object classification, etc. [e.g., Hubble Legacy Archive]