[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Right-sizing a sat [was: Antennas on the bird]



Jon -

Next time you are in Iowa, and looking at KA0Y's 50' EME dish, let me know.
Dr. Van Allen still keeps his office hours and teaches graduate physics
seminar classes at University of
Iowa.  You can hear it from the researcher himself !

I try to stop by and see him every couple of years when I am in Iowa City
[Both Dan Schultz N8FGV
and I were both in graduate college at Iowa in the early 1980's].

[ I still remember Dan's homebuilt Z-80 computer and a freshman student by
the name of Ted Waitt who left Iowa after his first year (and started the
Gateway computer company)

Greg
w9gb



----- Original Message -----
From: "Jon Ogden" <na9d@mindspring.com>
To: "guy lemke" <guy@com-pair.net>; <amsat-bb@AMSAT.Org>
Sent: Monday, January 15, 2001 7:09 AM
Subject: Re: [amsat-bb] Right-sizing a sat [was: Antennas on the bird]


> I could be wrong on the altitude of the belts.  I was trying to find out
> what the exact altitudes are, but could not.  2500 miles may be too low.
I
> know they've been mentioned on the bb before, but I just couldn't remember
> the exact height.  So don't quote me on it!
>
> 73,
>
> Jon
> NA9D
>
> on 1/14/01 11:16 PM, guy lemke at guy@com-pair.net wrote:
>
> > That may be true I don't know what the Alt. of the belt is but the
concept is
> > good
> > even if the Alt. that I suggested is bad...
> >
> > Jon Ogden wrote:
> >
> >> on 1/14/01 11:07 AM, guy lemke at guy@com-pair.net wrote:
> >>
> >>> I agree with the smaller birds... with an Alt. of some where around
1500 to
> >>> 2500 miles...A polar orbit with 4 birds spaced out over a 3 or 4 hours
space
> >>> would give really good coverage... I have a internet domain
> >>> "WWW.HAMSATS.ORG"
> >>> that I have not done any thing with yet but would be willing to donate
it
> >>> towards a team (hopefully including myself) in
> >>> putting together these birds and getting them up....
> >>
> >> I believe that the 1500 to 2500 mile range you suggest is smack dab in
the
> >> middle of the Van Allen Radiation Belt.  Nothing survives there for
very
> >> long.
>
>
> -------------------------------------
> Jon Ogden
> NA9D (ex: KE9NA)
>
> Member:  ARRL, AMSAT, DXCC, NRA
>
> http://www.qsl.net/ke9na
>
> "A life lived in fear is a life half lived."
>
> ----
> Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
>


----
Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA.
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home