Arecibo Observatory . ... NAIC (Arecibo) and NRAO (Green Bank) are organizing the fifth NAIC-NRAO school on single-dish radio astronomy. This will be held from 12-18 July 2009 at the Arecibo observatory in Puerto Rico. The objective of the school is to provide graduate students, post-docs, and experts in other fields of astronomy with both knowledge and practical experience of the techniques and applications of single-dish radio astronomy. ... First Announcement . Second Announcement . ...