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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Effective\s+of\s+ground\s+snow\s+on\s+Antenna\s+radiationpattern\s*$/: 6 ]

Total 6 documents matching your query.

1. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Sat, 13 Jan 2007 13:14:33 -0800
I don't know much about snow properties at HF, but at Ku-band (13.402 GHz, to be specific), the dielectric properties change a great deal with temperature and moisture content. Ice is not particularl
/archives//html/Towertalk/2007-01/msg00452.html (9,194 bytes)

2. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: "Mike Harris" <mike.harris@horizon.co.fk>
Date: Sun, 14 Jan 2007 10:32:37 -0300
G'day, During the my time in the Antarctic 1974 through 1976 I observed some ice depth radar work. This involved flying for hours at 50 feet above the snow surface, determined by radar altimeter and
/archives//html/Towertalk/2007-01/msg00454.html (8,519 bytes)

3. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: Martin AA6E <aa6e@ewing.homedns.org>
Date: Sun, 14 Jan 2007 09:12:37 -0500
There is snow and there is snow. (Ask a cross country skier.) Dry powder has lots of air in it, which gets partly compacted out after a while. Wet snow has liquid water mixed in, etc. Ken, There are
/archives//html/Towertalk/2007-01/msg00455.html (9,891 bytes)

4. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Sun, 14 Jan 2007 07:00:32 -0800
Especially if it is very cold. The AMSR-E instrument on Aqua (now in orbit as part of the "A-train" of earth observing instruments) is also used to evaluate presence of ice, but it's a microwave radi
/archives//html/Towertalk/2007-01/msg00456.html (9,425 bytes)

5. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: Jim Lux <jimlux@earthlink.net>
Date: Sun, 14 Jan 2007 07:08:17 -0800
Ice doesn't have all that high an epsilon (3.2 according to this reference http://snobear.colorado.edu/Markw/SnowHydro/dielectric_const.html)... Liquid water is really high (being a liquid and polar
/archives//html/Towertalk/2007-01/msg00457.html (9,871 bytes)

6. Re: [TowerTalk] Effective of ground snow on Antenna radiationpattern (score: 1)
Author: "Michael Hatzakis Jr MD" <lists@hatzakis.net>
Date: Sun, 14 Jan 2007 09:16:44 -0800
I can tell you that for my station here in Seattle, I notice significantly improved radiation when we get heavy snow, mainly because it is such a pain to drive so I just end up staying home and opera
/archives//html/Towertalk/2007-01/msg00462.html (11,419 bytes)


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