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The global oscillation network group site survey. II. Results

Hill, Frank and Fischer, George and Forgach, Suzanne and Grier, Jennifer and Leibacher, John W. and Jones, Harrison P. and Jones, Patricia B. and Kupke, Renate and Stebbins, Robin T. and Clay, Donald W. and Ingram, Robert E. L. and Libbrecht, Kenneth G. and Zirin, Harold and Ulrichi, Roger K. and Websteri, Lawrence and Hieda, Lester S. and Labonte, Barry J. and Lu, Wayne M. T. and Sousa, Edwin M. and Garcia, Charles J. and Yasukawa, Eric A. and Kennewell, John A. and Cole, David G. and Zhen, Huang and Su-Min, Xiao and Bhatnagar, Arvind and Ambastha, Aashok and Al-Khashlan, Abdulrahman Sa'Ad and Abdul-Samad, Muhammad-Saleh and Benkhaldoun, Zouhair and Kadiri, Samir and Sánchez, Francisco and Pallé, Pere L. and Duhalde, Oscar and Solis, Hernan and Saá, Oscar and González, Ricardo (1994) The global oscillation network group site survey. II. Results. Solar Physics, 152 (2). pp. 351-379. ISSN 0038-0938.

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The Global Oscillation Network Group (GONG) Project will place a network of instruments around the world to observe solar oscillations as continuously as possible for three years. The Project has now chosen the six network sites based on analysis of survey data from fifteen sites around the world. The chosen sites are: Big Bear Solar Observatory, California; Mauna Loa Solar Observatory, Hawaii; Learmonth Solar Observatory, Australia; Udaipur Solar Observatory, India; Observatorio del Teide, Tenerife; and Cerro Tololo Interamerican Observatory, Chile. Total solar intensity at each site yields information on local cloud cover, extinction coefficient, and transparency fluctuations. In addition, the performance of 192 reasonable components analysis. An accompanying paper describes the analysis methods in detail; here we present the results of both the network and individual site analyses. The selected network has a duty cycle of 93.3%, in good agreement with numerical simulations. The power spectrum of the network observing window shows a first diurnal sidelobe height of 3 × 10⁻⁴ with respect to the central component, an improvement of a factor of 1300 over a single site. The background level of the network spectrum is lower by a factor of 50 compared to a single-site spectrum.

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Libbrecht, Kenneth G.0000-0002-8744-3298
Additional Information:© 1994 Kluwer Academic Publishers. Provided by the NASA Astrophysics Data System. Received 19 January 1994; Revised 17 March 1994. This work utilizes data obtained by the Global Oscillation Network Group (GONG) project, managed by the National Solar Observatory, a Division of the National Optical Astronomy Observatories, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation. The GONG Project is composed of many people. At last count, approximately 200 people around the world had contributed to the site survey alone. The effort of these dedicated workers is greatly appreciated by the authors and the GONG.
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Subject Keywords:Power Spectrum; Duty Cycle; Cloud Cover; Network Site; Individual Site
Issue or Number:2
Record Number:CaltechAUTHORS:20200520-083019710
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Official Citation:Hill, F., Fischer, G., Forgach, S. et al. The global oscillation network group site survey. Sol Phys 152, 351–379 (1994).
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103345
Deposited By: Tony Diaz
Deposited On:20 May 2020 15:56
Last Modified:20 May 2020 15:56

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