A Concept for JDEM Science Computing and Operations"
Erik Gottschalk (Fermilab) on behalf of the JDEM/DOE Ground Data System Team"The Joint Dark Energy Mission (JDEM) is a collaboration between NASA and the U.S. Department ofEnergy (DOE) to build a space telescope for the study of dark energy using several complementarytechniques. The primary scientific objective is to determine the nature of dark energy in the universe bymeasuring the expansion history and the growth rate of large scale structure. DOE’s responsibilities
include the fabrication of a major science instrument and the development of a Science Operations
Center.

Launch andearly orbit
supportMission Operations Center (MOC)

White Sands
Complex"

LHC@FNAL Remote Operations CenterCommands
Telemetry

Ka-Band Telemetry
S-Band Command,
Telemetry, Tracking

Level 0Data

Science Operations Center (SOC)
Instrument
Commands

Pointing plans & schedules

Deep Space
Network(DSN)"

Science Support Center (SSC)• Ingest Level 0, 1, 2, 3 data and calibration products• Perform relevant Level 3 processing as required byscience teams• Collaborative development, with SOC, of pipelinearchitecture and standards• Science team and participating science support• Run JDEM Participating Science Program• Outreach to astronomy community• Education and Public Outreach• Science planning & scheduling interface toscience teams, MOC, and SOC

OrbitTracking• Spacecraft and instrument health and safety monitoring• Real time and stored command load generation• Spacecraft subsystem trending and analysis• Level 0 processing• Mission planning and scheduling• Ground System monitoring• Anomaly Resolution• Safemode Recovery
NASAFlight
Dynamics
Facility"

Level 0,1,2,3
Data• Ingest Level 0 data and generate FITS files• Perform Level 1 and Level 2 data processing• Perform relevant Level 3 processing and pipeline
development as higher level data products become available• Perform data challenges• Develop science analysis software• Develop calibration software• Instrument health and safety monitoring• Instrument simulation and mock data generation• Monitor instrument performance, trending and housekeeping• Instrument command validation & command interface to MOC• Maintain instrument testbed for verification & anomaly resolution• Generate and transmit instrument-generated science triggers• Transmit Level 0, 1, 2, 3 data to SSC & archiveDOE

NASASOC Infrastructure

Level 0,1,2,3 DataJDEM
Archive Center"
DOE

The Compact Muon Solenoid (CMS) experiment is one of the colliding beam experiments that will
begin operating at the Large Hadron Collider (LHC) at CERN in 2009. In the U.S., the LHC Physics
Center at Fermilab provides science support to CMS scientists. Remote operations capabilities areexpected to help streamline CMS operations. The development of these capabilities began at Fermilab
with the LHC@FNAL Remote Operations Center and has evolved into numerous remote operations
and monitoring centers around the world.
LHC@FNAL Remote Operations Center

Capabilities similar to those developed for CMS at Fermilab can be used for JDEM science computing
and operations, and to support science teams. This includes computing, networking and mass storage
infrastructure, as well as quality control, provenance tracking, and workflow management. Comparedto the computing resources that Fermilab has deployed for CMS, JDEM will need a small fraction ofavailable resources and can therefore leverage existing capabilities.

CMS Computing and Operations at Fermilab

Control &Monitoring

Monitoring

TriggeredDataCMS Control Room• Detector health and safety monitoring• Detector and trigger operations• Detector calibration• Real time data quality monitoring

Monitoring

CERN

CMS Tier 0 Computing• Prompt reconstruction of data
• Time critical calibration• Calculate conditions/alignment data
• Perform data challenges• Data archiving
CERN

Tier 0 Data

• Ingest Tier 0 data from CERN (10 Gbps network links)• Perform Tier 1 data processing, which consists of reprocessing
data with new conditions/alignment constants or new software• Serve data to Tier 2 sites for data analyses• Perform Tier 3 processing (science team data analyses)• Perform data challenges• Data quality monitoring shifts (real time & offline monitoring)• Monitoring of data processing and data movement• Data archiving
FNAL• Science team support

CMS Science Computing at Fermilab
CMS Centre @ CERN

• Data quality monitoring shifts (real time & offline monitoring)• Monitoring of data processing and data movement• Provide updated conditions/alignment data
• Science team support• Current core count = 11,000(24,000 total)• Current disk space = 6 PB
(10 PB total)• Current tape capacity = 24 PB (48 PB total)(Tape cartridge capacity doubles every 2-3 years)

CERN

Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy.