Searching for Extraterrestrial Intelligence: SETI Past, Present, and Future (The Frontiers Collection)
H. Paul Shuch
Format: PDF / Kindle (mobi) / ePub
This book is a collection of essays written by those who have led, and continue to lead, the search for extraterrestrial intelligence. It reviews the history of the subject, details present-day science and technology, and looks ahead to the future.
traversed the sky suggested that it was emanating from an aircraft cruising at unprecedented altitude – perhaps 80,000 feet! Of course, in April 1960, no known aircraft could reach the stratosphere. Such an aircraft, as it happened, didn’t “come into existence” until the following month, when Francis Gary Powers was shot down over the Soviet Union. (Frank wisely decided to withhold publication 16 Project Ozma of this positive result, so he never did receive proper credit for “discovering” the
Chief among those are the digital revolution that rendered the optical spectrum analyzer obsolete and made possible much more powerful signal analysis. Additional introductory material by SETI League president Richard Factor and executive director H. Paul Shuch, as well as a concluding tribute to Barney Oliver penned by John Billingham, further place this remarkable publication in its proper historical context, as a blueprint for the greatest radio telescope never built. 4 “Wow!” - A
4-million channel complex FFT boards feeding a flexible state-machine based feature recognizer array resident in a set of Pentium motherboards. The latter communicated over Ethernet with a UNIX workstation that performed final processing and archiving functions. BETA searched the 1400-1720 MHz spectrum in eight hops of 40 MHz bandwidth, with each hop taking 2 seconds yielding a 16 second time for a full cycle through the water hole. Thus each potential source was visited eight times at each
CO2 lasers for extraterrestrial communications in the infra-red., It is of note that the same Charles Townes of Nobel Laureate maser fame has been actively involved in optical SETI for many years. This chapter discusses some of the history of optical SETI, what is presently being done, and what we might do in the future, both on earth and on spacebased observatories. SETI has been of interest to one of the authors, Monte Ross (MR) since 1965, soon after the birth of the laser in 1960.
located by GPS so that the differential distance from a given target star to each telescope can be determined to calculate timings, and the Internet used not only to coordinate the switching of one target to the next but also to send the data to a central station. This became feasible with the advent of relatively low-cost singlephoton detector technology for use by amateurs. The timing of the receivers can yield better than 10 nanoseconds accuracy – i.e., once the physical locations of the