出典:Wikipedia
出典:『Wikipedia』 (2010/10/16 13:34 UTC 版)
The Solar Observing Optical Network (SOON) consists of five U.S. Air Force Air Weather Service observatories. The Air Force operates five solar telescopes distributed in longitude to maintain continuous coverage to monitor solar active regions at optical wavelengths. NGDC archives histograms of intensity versus area every minute for the active regions as well as magnetograms of the magnetic field structure and tachograms of plasma velocities on an irregular schedule.