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1. Topband: "Artificial" Propagation...? (score: 1): Author: Eddy Swynar <deswynar@xplornet.ca>; Date: Sat, 10 Mar 2012 12:01:14 -0500; Hi All, An on-line friend recently sent me this timely link re. an upcoming NASA experiment that involves the releasing of an aluminum oxide "cloud" some 60 miles above earth: http://www.aopa.org/air; /archives//html/Topband/2012-03/msg00014.html (7,058 bytes)
2. Re: Topband: "Artificial" Propagation...? (score: 1): Author: Bert Barry <bertbarry@xplornet.ca>; Date: Sat, 10 Mar 2012 15:26:04 -0500; Hi Eddy, Don't get your hopes up. For one thing, aluminum oxide is a very good insulator - its conductivity is around 10 to the 14th ohm.cm - although it has a high dielectric constant (around 9 to 1; /archives//html/Topband/2012-03/msg00015.html (8,407 bytes)
3. Re: Topband: "Artificial" Propagation...? (score: 1): Author: k9la@frontier.com; Date: Sun, 11 Mar 2012 02:10:43 +0000 (UTC); The peak of the nighttime E region is around 110 km, so 100 km is not too far below the E region. The lower E region is also where most absorption at night occurs on 160m. More to the point, refract; /archives//html/Topband/2012-03/msg00016.html (7,515 bytes)
4. Re: Topband: "Artificial" Propagation...? (score: 1): Author: "Hardy Landskov" <n7rt@cox.net>; Date: Sat, 10 Mar 2012 21:13:45 -0700; Carl, I thought someone, maybe NASA tried this many years ago and their folley was that the universal gravitational force equation did in the whole project because once 2 particles attach to one anot; /archives//html/Topband/2012-03/msg00018.html (8,785 bytes)
5. Re: Topband: "Artificial" Propagation...? (score: 1): Author: Arthur Delibert <radio75a3@msn.com>; Date: Sun, 11 Mar 2012 07:59:01 -0400; As I remember the earlier project, it was an effort in the early or mid 1960s to create perpetual worldwide twilight by shooting millions of tiny copper needles into the upper atmosphere. I remember; /archives//html/Topband/2012-03/msg00019.html (10,208 bytes)
6. Re: Topband: "Artificial" Propagation...? (score: 1): Author: "John Kaufmann" <john.kaufmann@verizon.net>; Date: Sun, 11 Mar 2012 11:45:01 -0400; Some of you may be thinking of "Project West Ford", conducted in the early 1960's by MIT Lincoln Laboratory (where I work now). Many millions of tiny "needles" were launched into orbit to generate an; /archives//html/Topband/2012-03/msg00021.html (9,643 bytes)
7. Re: Topband: "Artificial" Propagation...? (score: 1): Author: Arthur Delibert <radio75a3@msn.com>; Date: Sun, 11 Mar 2012 15:21:03 -0400; Thanks John. There's an interesting article about Project West Ford on Wikipedia, which describes the failed 1961 launch (the one I remember), and the successful 1963 launch. Apparently, radio astron; /archives//html/Topband/2012-03/msg00022.html (10,900 bytes)

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