1. Prototype Design Review
Global Oscillation Network Group
National Solar Observatory
950 N. Cherry Ave., Tucson, Arizona
GONG Hα Instrument
Prototype Design Review
September 22, 2009
Introductions…
GONG Team
Jack Harvey, GONG Instrument Scientist
George Luis, GONG Sr Engineer
Tim Purdy, Real-time Programmer
John Bolding, Programmer
Review Team
Rob Hubbard, NSO ATST Engineer
Dave Jaksha, NSO SOLIS Engineer
John Britanik, NSO SOLIS Programmer
AFWA: Project Manager Bryan Davis

2. Agenda September 22, 2009 8:30 – 9:00 Coffee & pastries
9:00 – 9:10 Introduction (Eliason)
Part I: Prototype Instrument
9:15 – 10:00 GONG Ha Instrument (Harvey)
10:05 – 10:30 Data Acquisition System (Luis)
10:30 – 10:45 Discussion
10:45 – 11:00 Break
Part II: Software Status
11:00 – 11:30 Real-time Software (Purdy)
11:30 – 12:00 Near-realtime Software (Bolding)
12:00 – 12:15 Discussion
12:15 – 1:15 Lunch Break (catered)
1:30 – 2:00 Closed Session: Review Committee
2:00 – 2:30 Committee Report and Wrap-up Discussion
Team
Jack Harvey, Instrument Scientist
George Luis, Sr Engineer
Tim Purdy, Realtime Programmer
John Bolding, Sr Programmer
Review Team
Rob Hubbard, ATST Engineer
Dave Jaksha, NSO SOLIS Engineer
John Bolding, NSO SOLIS Sr Programmer
AWFA Lead Bryan Davis
AFRL Carl Henney

3. Background
Discussion with AF Weather Directorate, April 14, 2008, Pentagon, Hill, Keyser, Lewis, Stoffler, and Zettlemoyer.
Statement of Work submitted to AFWA July 30, 2008, “GONG as a Backup System for AFWA’s O-SPAN Space Weather Network”.
AFWA – NSF transfer of funds December 17, 2008
Phase I: Adding Hα Observations to the GONG Instruments
Phase II: Continued operations to supply AFWA with Hα filtergrams, magnetic field, and helioseismic data
Not typical Proposal process;
Comes into play with regard to specifications and requirements

4. Phase I: Schedule Overview
with Key Dates
Top half… what we have accomplished
Bottom… what remains to do
Walk through…

5. Charge to the Review Committee
The purpose of this technical review is to provide the GONG Program with an expert critique of the design, functionality, and performance of the GONG Ha Prototype System.
Have we demonstrated that the Ha Instrument and Data Acquisition System meet the observational requirements to serve as a backup system for AFWA’s ISOON Space Weather Network?
Is the design reasonable or are there areas that could be improved or simplified?
Are there elements of the design that might be prone to failure in a 5+ year operation?
Are there areas that should receive special attention when testing the production systems?
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We would like the committee to prepare a brief written report, which should address our concerns noted above, as well as any issues that may come up during the review or during the committee’s meeting. Although not the focus of this review, if there is relevant feedback regarding the Software Status presentations, it should also be included.
Specs & Reqs…
The GONG H-alpha instrument needs to be as ISOON-like as possible in terms of spatial and spectral resolution, and provide images with as little as one-minute latency.
Provide an Hα image 1 per min using full 7 cm aperture of GONG instrument (limit of 1.92 arcsec);
Match ISOON format in terms of spatial and spectral resolution (2048 pixel camera is a good match)
Rapid transfer of image to AFWA via the Internet.