Solar B Mission Operations Working Group - 3 February 2003 - Page 1

SS

Instrument Operations for TIMED, Cluster, & Stereo

C. P. Holmes

Sun-Earth Connection MO&DA Program

NASA Hq

Solar B Mission Operations Working Group - 3 February 2003 - Page 2

SS TIMED

Launched Dec 2001

Operated at Johns Hopkins University/Applied Physics Lab. Downlink at JHU/APL and USN (Fairbanks)

Four Instruments SABRE - Hampton University (PI) and Langley Research Center GUVI - Aerospace Corp (PI) and JHU/APL SEE - U. of Colorado TIDI - NCAR (PI) and U. of Michigan

Instrument payload operations centers organize commands and forward to JHU/APL for uplink

The TIMED science center forwards level-0 processed data to instrument sites and hosts distribution of higher level products.

Intimate coordination of spacecraft/instrument operations during calibration maneuvers and other special operations

Solar B Mission Operations Working Group - 3 February 2003 - Page 3

SS Cluster

Four spacecraft launched in August 2000

Operated by ESA at ESOC [Darmstadt]

Downlink via ESOC network: Vilspa, Maspalomas, Redu plus the DSN

Eleven instrument PIs and instrument centers distributed throughout Europe and USA

Payload operations coordinated at Rutherford Laboratories Gathers commands from instruments operations centers Organizes and forwards to ESOC for uplink Organizes the level-zero data for distribution to instrument centers Data distributed through several ‘mirror’ sites in Europe and USA(GSFC)

The Science Operations Working Team coordinate special maneuvers and other operations.

Periodic meetings - typically semiannually Monitors daily spacecraft and instrument operations

Solar B Mission Operations Working Group - 3 February 2003 - Page 4

SS STEREO

To be launched late 2005

2 spacecraft in heliocentric orbits

Downlink via the DSN

Mission operations at JHU/APL

Four instrument suites: Instrument operations and processing from NRL, UNH, UCB, and GSFC

Science data distribution via the Stereo Science Center at GSFC and the Solar Virtual Observatory

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SS STEREO’s Mission Operations

STEREO’s mission operations approach reduces costs while enhancing science return by using two autonomously designed spacecraft, and by separating spacecraft and instrument operations.

Each of the twin observatories can carry out many functions on its own, including sensing its position, orientation and orbit, and react accordingly. Since autonomous spacecraft are easier to operate, the spacecraft and instruments can be controlled from separate locations.

Worldwide experts over a wide range of specialties are teaming to carry out the STEREO mission. Each of the four instrument principal investigators, or PIs, will have direct control of their instruments and experiments from Payload Operations Centers situated at four locations worldwide.

The Payload Operations Centers will forward commands daily to the STEREO Mission Operations Center located at The Johns Hopkins University Applied Physics Laboratory, in Laurel, Md. Here, instructions for the instruments and spacecraft will be combined and uplinked to each of the observatories once daily using NASA’s Deep Space Network. The APL-based Mission Operations Center will also oversee downlinking data from both observatories, forwarding it electronically to the STEREO Science Center at NASA Goddard Space Flight Center, Greenbelt, Md., and to each of the Payload Operations Centers.

From http://stereo.jhuapl.edu

Solar B Mission Operations Working Group - 3 February 2003 - Page 6

SS The Virtual Solar Observatory

Beginning prototype development

Organized by the solar data services SDAC NSO Stanford Montana State Univ

Small box approach but ‘extensible’

See the Design Proposal and other info at http://virtualsolar.org