... Add your clubs URL: send to Mike Grilley . ... Association of Universities for Research in Astronomy (AURA) - serves the entire astronomical community by providing modern, major facilities to qualified scientists from all universities. American Association of Amateur Astronomers . The Astronomical League's Internet Astronomy Club) . ... Society of Astrophysics - Sidwell Friends School - The Astronomy Club (a.k.a. The Astrophysics Society) is Sidwell Friends School's only science-related club. ...

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a FEATURES 200 MSPS Guaranteed Conversion Rate 135 MSPS Low Cost Version Available 350 MHz Analog Bandwidth 1 V p-p Analog Input Range Internal +2.5 V Reference and T/H Low Power: 500 mW +5 V Single Supply Operation TTL Output Interface Single or Demultiplexed Output Ports APPLICATIONS RGB Graphics Processing High Resolution Video Digital Data Storage Read Channels Digital Communications Digital Instrumentation Medical Imaging VREF IN 8-Bit, 200 MSPS A/D Converter ... Output Current Figure 31. ...

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• Arecibo Observatory Publications

... A non-linear relationship is observed between the sky brightness on clear and overcast nights, with a change in behavior near the rural to urban landuse transition. ... The great variation in skyglow radiance observed from site-to-site and with changing meteorological conditions underlines the need for a long-term international monitoring program. he introduction of artificial light has caused an unprecedented disruption to the nighttime environment over large areas of the Earth. ... Data processing...

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