THEMIS/GBO CDR Peer Review 1 Univ.of Calgary, Apr , 2004 Ground Based Observatories (GBO) CDR Peer Review S. B. Mende University of California - Berkeley

THEMIS/GBO CDR Peer Review 2 Univ.of Calgary, Apr , 2004 GBO Team Institutions University of California – Berkeley (UCB) S. B. Mende – GBO science lead Provides ASI development, system engineering, GBO system fabrication and construction, data archive and dissemination University of California – Los Angeles (UCLA) C. T. Russell – magnetometer science lead Develop and provide ground magnetometer for GBO / EPO University of Calgary E. Donovan – Canadian science lead Providing GBO system deployment in Canada, field management, data collection, development participation University of Alberta I. Mann – magnetometer scientist Providing access to Canadian magnetometer network

THEMIS/GBO CDR Peer Review 3 Univ.of Calgary, Apr , 2004 GBO / UCB Organization GBO Lead Co-Investigator S. B. Mende GBO Lead Co-Investigator S. B. Mende Administrator Ya Ling Zhu Administrator Ya Ling Zhu Project Manager S. Harris Project Manager S. Harris Test & Verif. H. Frey Test & Verif. H. Frey System Eng. S. Harris System Eng. S. Harris Mechanical G. Dalton Mechanical G. Dalton Software S. Geller Software S. Geller Assembly B. Dalen Assembly B. Dalen Electrical Test TBD Electrical Test TBD UCB Organization

THEMIS/GBO CDR Peer Review 4 Univ.of Calgary, Apr , 2004 GBO/EPO Magnetometer Organization Lead Co-Investigator C. T. Russell Lead Co-Investigator C. T. Russell R & QA D. Dearborn R & QA D. Dearborn Business Office J Nakatsuka Business Office J Nakatsuka Program Manager D. Pierce Program Manager D. Pierce Magnetics R. Snare Magnetics R. Snare Analog D. Pierce Analog D. Pierce Mechanical G. Barr Mechanical G. Barr Digital D. Dearborn Digital D. Dearborn Assembly W. Greer Assembly W. Greer UCLA Organization

THEMIS/GBO CDR Peer Review 5 Univ.of Calgary, Apr , 2004 GBOs: A synoptic view of the aurora Global auroral image taken by IMAGE WIC. Proposed THEMIS GBO sites superimposed.

THEMIS/GBO CDR Peer Review 6 Univ.of Calgary, Apr , 2004 GBO Science Objective GBO shall monitor the auroral light and ionospheric currents across North America in order to localize the time, location, and evolution of the auroral manifestation of the substorm. Themis mission requirement relating to GBO: Determine substorm onset time and substorm meridian magnetic local time (MLT) using All Sky Imagers (one ASI per MLT hr) and Ground Magnetometer (two GMAG per MLT hr) with t_res<30s and dMLT<1° respectively, in an 8hr geographic local time sector including the US.

THEMIS/GBO CDR Peer Review 7 Univ.of Calgary, Apr , 2004 GBO Derived Requirements

THEMIS/GBO CDR Peer Review 8 Univ.of Calgary, Apr , 2004 Implementation Plan GBO Program Implementation: Integrate ASI from UCB, GMAG from UCLA with site prep and deployment provided by U. Calgary Build, calibrate and qualify first unit within one year after start of Phase B Five sites shall be installed two winters before THEMIS launch Total GBO installed network shall be 20 sites, installed one winter before THEMIS launch

THEMIS/GBO CDR Peer Review 9 Univ.of Calgary, Apr , 2004 GBO Site Locations IMAGE FUV substorm onset identification. Of events indicated within GBO longitude sector, 2% are outside the latitude covered

THEMIS/GBO CDR Peer Review 10 Univ.of Calgary, Apr , 2004 GBO Site List - Today

THEMIS/GBO CDR Peer Review 11 Univ.of Calgary, Apr , 2004 GBO Site Location Deployment

THEMIS/GBO CDR Peer Review 12 Univ.of Calgary, Apr , 2004 Observatory Design Major components: Science Instruments: –All Sky Imager (ASI) –Ground Magnetometer (GMAG) –GPS Observatory Equipment –Communications –Environment Control –System Computer

THEMIS/GBO CDR Peer Review 13 Univ.of Calgary, Apr , 2004 GBO Components AC Power GMAG Telesat Dish Iridium GPS All Sky Imager Computer Enclosure Internet Variations possible at some sites: Existing magnetometer Enclosures not needed Existing Internet connection

THEMIS/GBO CDR Peer Review 14 Univ.of Calgary, Apr , 2004 All Sky Imager Overview: Design Specifications Interface Data Products

THEMIS/GBO CDR Peer Review 15 Univ.of Calgary, Apr , 2004 All Sky Imager Heritage Environmental protection/deployment and automation drawn from AGOs (flawless multi-year operation in Antarctica). Prototype camera field tested in Canada – Demonstrated high cadence, high sensitivity –Taking 5s images

THEMIS/GBO CDR Peer Review 16 Univ.of Calgary, Apr , 2004 ASI primary image 290 pixel diameter is “binned” to 0.5° resolution (thumbnails) Primary science data: Level 1 (~ 1kbps) (incl GMAG, housekeeping) Available via SAT comm, either Telesat (Internet real-time) or Iridium (daily) High resolution data: Level 0 (180 kbps) Selective downloads via Satellite Internet Periodic collection via disk swapping ASI Data Products

THEMIS/GBO CDR Peer Review 17 Univ.of Calgary, Apr , 2004 Ground Magnetometer Overview: Specifications Design Data Products Software GBO & E/PO

THEMIS/GBO CDR Peer Review 18 Univ.of Calgary, Apr , 2004 Results from Peer Review Comments from reviewers were positive: “review was conducted with quality information” “details of the system were well engineered” “detailed consideration of environmental accommodation” “Success is likely given the proposers’ excellent experience and track record.” “likely to accomplish not only the THEMIS mission, but also provide a wealth of data for auroral research in general.” “applaud the team for their emphasis on a web based real time delivery of…data” “Overall plan and direction seems good.” “Early deployment, beginning this coming winter, is good idea” Reviewers also provided several recommendations…

THEMIS/GBO CDR Peer Review 19 Univ.of Calgary, Apr , 2004 Peer Review Action Status, 1

THEMIS/GBO CDR Peer Review 20 Univ.of Calgary, Apr , 2004 Peer Review Action Status, 2