[amsat-bb] Re: using a microsat as a potential high altitude VHF reflector
There are two neat concepts from the early days of communications experiments using satellites and Echo is one of them (the other is SCORE). There were a lot of ideas for follow on echos...one used a gravity gradient pole to stop the balloon from spinning and keeping it pointed to the earth, allowing a directional reflector to be installed in the balloon...another used a radar reflector like concept inside the balloon to increase the amount of DB that returned... The problems were large however. Doppler shift and tracking were issues at the time (and probably still are)..the antennas were going to have to be large (really large). My elmer in Dallas when he was in the USAF did some radar experiments with echo...I got to see it a few times. SCORE probably has more relevance to todays possibilities. Robert WB5MZO _ New Windows 7: Find the right PC for you. Learn more. http://www.microsoft.com/windows/pc-scout/default.aspx?CBID=wlocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_pcscout:102009 ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: using a microsat as a potential high altitude VHF reflector
were there any ham radio projects (either through amsat-na or abroad) that implemented a passive reflector on an orbital vehicle like Project Echo Not long ago I saw some webpages and emails about some hams using ISS (or was it Mir?) as a passive reflector. Coincidently, I was reading about the West Ford project, which was launches of millions of small wire dipoles to be used as reflectors. Some of those clusters are still in orbit. I wonder if they are still in a dense enough field to reflect the 8 Ghz? signal they were designed for. 73, Drew KO4MA ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: using a microsat as a potential high altitude VHF reflector
Drew. I had forgotten about West Ford...but they are all gone. While in grad school we tried some reflection test using the then prototype of the SPS 48E and there was nothing... Robert WB5MZO Date: Wed, 28 Oct 2009 16:12:54 -0400 From: glasbren...@mindspring.com To: samudra.ha...@gmail.com CC: amsat-bb@amsat.org Subject: [amsat-bb] Re: using a microsat as a potential high altitude VHF reflector were there any ham radio projects (either through amsat-na or abroad) that implemented a passive reflector on an orbital vehicle like Project Echo Not long ago I saw some webpages and emails about some hams using ISS (or was it Mir?) as a passive reflector. Coincidently, I was reading about the West Ford project, which was launches of millions of small wire dipoles to be used as reflectors. Some of those clusters are still in orbit. I wonder if they are still in a dense enough field to reflect the 8 Ghz? signal they were designed for. 73, Drew KO4MA ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _ Windows 7: Simplify your PC. Learn more. http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen1:102009 ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
[amsat-bb] Re: using a microsat as a potential high altitude VHF reflector
Space-Track is still tracking several clusters of Westford needles, although they are certainly spread out and thinning fast. Some are still nearly in their original orbits. As evidence: WESTFORD NEEDLES 1 00602U 63014E 09300.68434638 +.0003 +0-0 +1-3 0 07665 2 00602 087.3316 050.1496 0032690 004.4295 355.6847 08.67203352471339 73, Drew KO4MA ___ Sent via amsat...@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
