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CX2SA > SATDIG 11.08.09 01:23l 940 Lines 29402 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: New Cubesat - the Ultimate Fox Hunt (Joe)
2. Re: New Cubesat - the Ultimate Fox Hunt (Alan VE4YZ)
3. Re: New Cubesat - the Ultimate Fox Hunt (Joe)
4. Re: New Cubesat - the Ultimate Fox Hunt (Tony Langdon)
5. US ANTENNA ( Fco. Jim?nez-Mart?n S?nchez )
6. Re: US ANTENNA (Jim Jerzycke)
7. Re: New Cubesat - the Ultimate Fox Hunt (Sil - ZL2CIA)
8. Re: New Cubesat - the Ultimate Fox Hunt (David Barber)
9. Re: New Cubesat - the Ultimate Fox Hunt (Sil - ZL2CIA)
10. Re: New Cubesat - the Ultimate Fox Hunt (Sil - ZL2CIA)
11. Re: New Cubesat - the Ultimate Fox Hunt (Graham Shirville)
12. Re: New Cubesat - the Ultimate Fox Hunt - kinda OT now, sorry
(Sil - ZL2CIA)
13. Re: New Cubesat - the Ultimate Fox Hunt (Nigel Gunn G8IFF/W8IFF)
14. Wavetek 3000 (WILLIAMS MICHAEL)
15. keps (Nigel Gunn G8IFF/W8IFF)
16. Re: New Cubesat - the Ultimate Fox Hunt (Rocky Jones)
17. logging software (Douglas Anoman)
18. Re: keps (Nigel Gunn G8IFF/W8IFF)
----------------------------------------------------------------------
Message: 1
Date: Sun, 09 Aug 2009 21:20:24 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Bob Bruninga <bruninga@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A7F83E8.2080700@xxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
Bob Bruninga wrote:
>>at take off we go from zero to 17580 Mph
>>in what 10 minutes or so and are in orbit.
>>Yet the other way around going from 1780
>>to zero in 45 minutes causes the fireball
>>effect with the friction.
>>
>>Why not on the way up?
>>
>>
>
>It does, its just that all the energy is being burned at the rear end of the
rocket to produce the acceleration... see the flames... On the way down, you
have to decelerate that same amount of acceleration in the opposite direction
and remove all that LAUNCH energy, to come back down.... hence the flames.
>
>
No the flames are from friction with the atmosphere. if they had enough
fuel they could do a 8 minute burn, and come straight down. The "Fuel"
in this case is Gravity. The fuel on the way up is used to over come
gravity.
>The difference is that going up, you are going slowly in the higher density
atmosphere which is continually lessening as you go up letting you go faster
and faster with less and less friction. THus, no multiplying build up of
friction.
>
>
But see where are the numbers to verify this? People make this statement
all the time. but have yet to show any data that verifies this. Why is
this soo hard to verify?
>Coming down, everything is against you. As you come down, into denser and
denser atmosphere, the friction is increasing and increasing, the temperature
building and building you are going slower and slower and falling faster and
faster. Into one ultimate fireball.
>
>
Yes and no, you are in free fall the whole time you are in orbit.
>
>
>>we can go from zero to 17580 in ten min
>>on the way up with no fireball, but take
>>a slower, 450% slower return rate and it
>>almost fries to a crisp.
>>
>>
>
>Thats why I'm thinking there might be a way to change your drag coefficient
as you come down to reduce the crescendo build up of heat and spread out the
descent. But still, for something as small as a cubesat you still have to
disipate about 300KWH of energy and even if you do this over an hour, thats
still 300 killowatts of heat... (a number they used here in the presentation..
I'd like to see confirmation)...
>
>
I'd like to see any data of speed vs altitude..
Joe
>Still seems like a fireball..
>
>Bob, WB4APR
>
>
>
>
------------------------------
Message: 2
Date: Sun, 9 Aug 2009 21:41:28 -0500
From: "Alan VE4YZ" <ve4yz@xxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: "'Joe'" <nss@xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <0ABFD97B9A034433B46C0140183AFC4C@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Joe and the group... Here is 25 year old data of STS5
http://www.habitablezone.com/columbia/Archive/Dryden/Documents/H-1254_Therma
lResponseShuttleWingReentryHeading.pdf
Go to page 7 of the PDF and see graph and you can take off altitude,
velocity over time.
Google is a wonderful thing. Google "reentry velocity altitude shuttle"
But see where are the numbers to verify this? People make this statement all
the time. but have yet to show any data that verifies this. Why is this
soo hard to verify?
...Stuff deleted...
I'd like to see any data of speed vs altitude..
Joe
------------------------------
Message: 3
Date: Sun, 09 Aug 2009 22:41:33 -0500
From: Joe <nss@xxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Alan VE4YZ <ve4yz@xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A7F96ED.7000707@xxx.xxx>
Content-Type: text/plain; charset=us-ascii; format=flowed
I'm crunching numbers right now, but just thought of something
ICBM's If we were to nuke RUSSIA or visa versa, while these yes do not
get to orbit, they do get to just shy of orbital velocity, and re enter
the atmosphere, did they have all these elaborate heat shields?
Alan VE4YZ wrote:
>Joe and the group... Here is 25 year old data of STS5
>
>http://www.habitablezone.com/columbia/Archive/Dryden/Documents/H-1254_Therma
>lResponseShuttleWingReentryHeading.pdf
>
>Go to page 7 of the PDF and see graph and you can take off altitude,
>velocity over time.
>
>Google is a wonderful thing. Google "reentry velocity altitude shuttle"
>
>
>
>
>
>
>
>But see where are the numbers to verify this? People make this statement all
>the time. but have yet to show any data that verifies this. Why is this
>soo hard to verify?
>
>...Stuff deleted...
>
>
>I'd like to see any data of speed vs altitude..
>
>Joe
>
>
>
>------------------------------------------------------------------------
>
>
>No virus found in this incoming message.
>Checked by AVG - www.avg.com
>Version: 8.5.406 / Virus Database: 270.13.49/2293 - Release Date: 08/09/09
18:10:00
>
>
>
------------------------------
Message: 4
Date: Mon, 10 Aug 2009 14:24:01 +1000
From: Tony Langdon <vk3jed@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: amsat-bb@xxxxx.xxx
Message-ID: <4a7fa0ea.1f588c0a.4f6d.4495@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 01:41 PM 8/10/2009, you wrote:
>I'm crunching numbers right now, but just thought of something
>
>ICBM's If we were to nuke RUSSIA or visa versa, while these yes do not
>get to orbit, they do get to just shy of orbital velocity, and re enter
>the atmosphere, did they have all these elaborate heat shields?
I believe a lot of work on atmospheric entry (i.e. heat shielding)
systems did actually start from the early days of ICBMs for this very
reason. I don't think the speeds are that close to orbital speeds
(one only needs to fall 3000 miles away, not 8000+), though they are
high enough that the warheads must be designed to survive re-entry.
There's a bit about ICBM re-entry systems on Wikipedia
http://en.wikipedia.org/wiki/Atmospheric_reentry
73 de VK3JED / VK3IRL
http://vkradio.com
------------------------------
Message: 5
Date: Sun, 9 Aug 2009 20:04:43 +0200
From: " Fco. Jim?nez-Mart?n S?nchez " <ea1jm.fran@xxxxx.xxx>
Subject: [amsat-bb] US ANTENNA
To: <amsat-bb@xxxxx.xxx>
Message-ID: <4a7f0fbe.1818d00a.766d.ffffcf69@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi there,
Has anyone of you tried the us quadrifilar antenna to receive? It?s offered
in this page:
http://www.antennas.us/Store/ProductDetails.aspx?itemID=229#
and it seems it?s a solution for me. Any report or comment is welcome.
Thanks and regards from Spain,
Fran.
------------------------------
Message: 6
Date: Sun, 9 Aug 2009 22:21:56 -0700 (PDT)
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Subject: [amsat-bb] Re: US ANTENNA
To: amsat-bb@xxxxx.xxxx Fco. Jim?nez-Mart?n S?nchez
<ea1jm.fran@xxxxx.xxx>
Message-ID: <85743.33371.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Steve Ford did a review on these a while back in QST. He said they work "As
Advertised".
Jim? KQ6EA
--- On Sun, 8/9/09, Fco. Jim?nez-Mart?n S?nchez <ea1jm.fran@xxxxx.xxx> wrote:
From: Fco. Jim?nez-Mart?n S?nchez <ea1jm.fran@xxxxx.xxx>
Subject: [amsat-bb] US ANTENNA
To: amsat-bb@xxxxx.xxx
Date: Sunday, August 9, 2009, 11:04 AM
Hi there,
Has anyone of you tried the us quadrifilar antenna to receive? It?s offered
in this page:
http://www.antennas.us/Store/ProductDetails.aspx?itemID=229#
and it seems it?s a solution for me. Any report or comment is welcome.
Thanks and regards from Spain,
Fran.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 7
Date: Mon, 10 Aug 2009 20:40:32 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Bob Bruninga <bruninga@xxxx.xxx>, Amsat Reflector
<amsat-bb@xxxxx.xxx>
Message-ID: <4A7FDD00.2070102@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Bob Bruninga wrote:
> The difference is that going up, you are going slowly in the higher density
atmosphere which is continually lessening as you go up letting you go faster
and faster with less and less friction. THus, no multiplying build up of
friction.
>
>
Bob,
I hesitate to say this, but I'm almost certain that re-entry heating is
not caused by friction (well may be 10%). Most reliable sources, NASA
included, attribute re-entry heating to shock wave compression of the
air in front of the descending craft.
Sil
ZL2CIA
------------------------------
Message: 8
Date: Mon, 10 Aug 2009 09:56:27 +0100
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: <amsat-bb@xxxxx.xxx>
Message-ID: <17C74D6E6C3448A2B05C419D30AC37C4@xxxxxxxx>
Content-Type: text/plain; charset="US-ASCII"
Having considered this yesterday I decided to 'keep quiet' but having woken
this morning to David's ceramic suggestion I'll add my own pennyworth.
As the Shuttle uses ceramic tiles it seemed logical to suggest that a device
embedded within such a material would serve the purpose. Perhaps move away
from the cube design to a classic "flying saucer" shape.
As David says, the ceramic is transparent to RF, a classic saucer shape
offers two significant surfaces for solar cells; sized correctly the
circumference could provide for an embedded (and therefore protected) dipole
and if re-entry could be engineered to occur 'edge on' a minimal profile
would be presented.
I wonder if they have "B" grade (Shuttle) tiles left over?
David
G8OQW
********
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of G0MRF@xxx.xxx
Sent: 10 August 2009 00:31
To: bruninga@xxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
Or, the not so 'cube'sat structure is an aerodynamic shape made from a cast
ceramic material which glides in at a shallow angle allowing the energy to
be dissipated over a much longer period of time.
OK the solar cells burn off but an internal antenna would be OK as ceramics
are fairly transparent to RF and a battery would provide the final hour or
so of tlm.
Would love to see the temp readings as it comes down.
Would not love to be on the final end of the trajectory when it arrives.
David G0MRF
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 9
Date: Mon, 10 Aug 2009 21:13:32 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Amsat Reflector <amsat-bb@xxxxx.xxx>
Message-ID: <4A7FE4BC.90608@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Sil - ZL2CIA wrote:
> Bob Bruninga wrote:
>
>
>> The difference is that going up, you are going slowly in the higher density
atmosphere which is continually lessening as you go up letting you go faster
and faster with less and less friction. THus, no multiplying build up of
friction.
>>
>>
>>
> Bob,
>
> I hesitate to say this, but I'm almost certain that re-entry heating is
> not caused by friction (well may be 10%). Most reliable sources, NASA
> included, attribute re-entry heating to shock wave compression of the
> air in front of the descending craft.
>
> Sil
> ZL2CIA
>
Wikipeadia reckon 80% of the heating experienced by a re-entering
orbiter (shuttle) is the result of compression, leaving 20% to friction.
The 90% figure might be more correctly applied to the Apollo re-entry
vehicle. It was a very different shape.
Some highspeed vehicles did experience severe heating, notably the
amazing X-15 craft.
The question is a good one, but the answer has needs to consider far
more than frictional heating, since that accounts for only a small part
of the energy that is converted to heat during re-entry.
I have no idea what the equivalent ratio is on the way up, but it is a
delightful puzzle. Thanks Joe.
Sil
ZL2CIA
Sil
------------------------------
Message: 10
Date: Mon, 10 Aug 2009 21:34:35 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Joe <nss@xxx.xxx>, Amsat Reflector <amsat-bb@xxxxx.xxx>
Message-ID: <4A7FE9AB.4050104@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Joe,
I found a graph here
http://www.hq.nasa.gov/pao/History/conghand/possibil.htm
that shows speed versus altitude (in obscure units, but never mind) for
both sounding rockets and orbital satellite launches (into a circular orbit)
It's not in the greatest detail.
Now to find the same data for the way down.
Sil
ZL2CIA
------------------------------
Message: 11
Date: Mon, 10 Aug 2009 11:13:21 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: "Sil - ZL2CIA" <zl2cia@xxxxx.xxx>, "Bob Bruninga"
<bruninga@xxxx.xxx>, "Amsat Reflector" <amsat-bb@xxxxx.xxx>
Message-ID: <F335528F500345FCB77FCAD31903E8A2@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
According to the "Apollo 11 Owner's Workshop Manual" recently published by
Haynes here in the UK
page 71
"Atmospheric Heating"
Frictional heating was not just a problem during re-entry. During the
acceleration after launch through the thicker, lower atmosphere, the apex of
the command module would also be exposed to aerodynamic heating and needed
protection by an additional cork and fibreglass shroud attached to the
launch escape tower.
The far more intense re-entry heating is often mistakenly thought to be
something to do with friction with the passing air. In fact the extra
heating during re-entry is more comparable to the heat that builds up in a
valve in a bicycle pump as air is compressed into a tyre. When any gas is
compressed the amount of energy that it holds in a given volume rises. When
the air in front of a blunt hypersonic craft cannot move aside fast enough
it becomes compressed and so heats up for the same reason.
During re-entry the speeds, and therefore the compression, are so great that
the temperature can easily rise into the thousands of degrees, approaching
the same sort of temperature as on the surface of the sun (5,500C) . The
advantage of the blunt shape has in this process over a more streamlined
form is that by creating this compressed layer of air ahead of it, the main
part of the craft is separated from the hottest and most damaging heat."
So all we need is a cubesat containing a deorbit propulsion system so that
the landing point can be carefully selected, which has inside it, a
miniature Apollo shaped capsule made of titanium with a heat shield on the
blunt end and which has ceramic panels so that the inbuilt GPS can receive
and the VHF or UHF or S band transmitter can transmit.:)
73
Graham G3VZV
PS The Haynes Manual is available from the RSGB
----- Original Message -----
From: "Sil - ZL2CIA" <zl2cia@xxxxx.xxx>
To: "Bob Bruninga" <bruninga@xxxx.xxx>; "Amsat Reflector"
<amsat-bb@xxxxx.xxx>
Sent: Monday, August 10, 2009 9:40 AM
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
> Bob Bruninga wrote:
>
>> The difference is that going up, you are going slowly in the higher
>> density atmosphere which is continually lessening as you go up letting
>> you go faster and faster with less and less friction. THus, no
>> multiplying build up of friction.
>>
>>
> Bob,
>
> I hesitate to say this, but I'm almost certain that re-entry heating is
> not caused by friction (well may be 10%). Most reliable sources, NASA
> included, attribute re-entry heating to shock wave compression of the
> air in front of the descending craft.
>
> Sil
> ZL2CIA
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 12
Date: Mon, 10 Aug 2009 22:29:10 +1200
From: Sil - ZL2CIA <zl2cia@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt - kinda OT
now, sorry
To: Amsat Reflector <amsat-bb@xxxxx.xxx>
Message-ID: <4A7FF676.3080701@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Graham,
Cool. But still no cigar as far as Joe's question.
So.. the broad flat shape generates more compressive heating, than the
more pointy nose of the launch vehicle. But... the launch vehicle is
still going to generate a great deal of heat through the same process if
it is doing the same hypersonic speed at the same altitude.
So is it?
Sil
Graham Shirville wrote:
> According to the "Apollo 11 Owner's Workshop Manual" recently
> published by Haynes here in the UK
> page 71
>
> "Atmospheric Heating"
> Frictional heating was not just a problem during re-entry. During the
> acceleration after launch through the thicker, lower atmosphere, the
> apex of the command module would also be exposed to aerodynamic
> heating and needed protection by an additional cork and fibreglass
> shroud attached to the launch escape tower.
> The far more intense re-entry heating is often mistakenly thought to
> be something to do with friction with the passing air. In fact the
> extra heating during re-entry is more comparable to the heat that
> builds up in a valve in a bicycle pump as air is compressed into a
> tyre. When any gas is compressed the amount of energy that it holds in
> a given volume rises. When the air in front of a blunt hypersonic
> craft cannot move aside fast enough it becomes compressed and so heats
> up for the same reason.
> During re-entry the speeds, and therefore the compression, are so
> great that the temperature can easily rise into the thousands of
> degrees, approaching the same sort of temperature as on the surface of
> the sun (5,500C) . The advantage of the blunt shape has in this
> process over a more streamlined form is that by creating this
> compressed layer of air ahead of it, the main part of the craft is
> separated from the hottest and most damaging heat."
>
> So all we need is a cubesat containing a deorbit propulsion system so
> that the landing point can be carefully selected, which has inside it,
> a miniature Apollo shaped capsule made of titanium with a heat shield
> on the blunt end and which has ceramic panels so that the inbuilt GPS
> can receive and the VHF or UHF or S band transmitter can transmit.:)
>
> 73
>
> Graham G3VZV
>
> PS The Haynes Manual is available from the RSGB
------------------------------
Message: 13
Date: Mon, 10 Aug 2009 11:22:14 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: Joe <nss@xxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A8002E6.3080306@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Why shouls someone spend money making measurements to get your figures?
The current system already works. There's nothing broken that needs to be
fixed.
Joe wrote:
> But see where are the numbers to verify this? People make this statement
> all the time. but have yet to show any data that verifies this. Why is
> this soo hard to verify?
------------------------------
Message: 14
Date: Mon, 10 Aug 2009 08:00:16 -0700 (PDT)
From: WILLIAMS MICHAEL <k9qho6762@xxxxxxxxx.xxx>
Subject: [amsat-bb] Wavetek 3000
To: amsat-bb@xxxxx.xxx
Message-ID: <106003.80625.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
On the Wavetek 3000 signal generator, there are coax jumpers between the
modules.
?
What kind of plug/jacks are being used on these cables?
?
It looks like SMC.
?
I've lost lock on one of the modules and?want to do some troubleshooting.
?
?
Tnx,
?
Mike (K9QHO)
------------------------------
Message: 15
Date: Mon, 10 Aug 2009 15:44:34 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] keps
To: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4A804062.7020900@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
DRAGONSAT
1 35690U 09038B 09221.89608423 +.00022175 +00000-0 +11546-3 0 00164
2 35690 051.6395 030.5236 0004962 117.8896 242.2609 15.80851730001648
ANDE DEB (POLLUX CYLIN)
1 35691U 09038C 09221.70802767 +.00035012 +00000-0 +18101-3 0 00126
2 35691 051.6372 031.5130 0003278 060.5793 299.5342 15.80733597001589
ANDE DEB (CASTOR CYLIN)
1 35692U 09038D 09221.70695586 +.00062797 +00000-0 +31457-3 0 00147
2 35692 051.6378 031.5075 0003507 047.1048 312.9989 15.81158879001585
ANDE POLLUX SPHERE
1 35693U 09038E 09221.70956582 +.00019877 +00000-0 +10632-3 0 00114
2 35693 051.6401 031.5281 0003927 062.6051 297.5208 15.80349868001585
ANDE CASTOR SPHERE
1 35694U 09038F 09221.71086029 +.00010853 +00000-0 +60531-4 0 00126
2 35694 051.6408 031.5388 0004491 065.1875 294.9492 15.80061125001583
ANDE DEB (AVIONICS DECK)
1 35695U 09038G 09221.71034237 +.00026177 +00000-0 +13913-3 0 00128
2 35695 051.6404 031.5352 0004608 067.4387 292.6889 15.80288280001582
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail nigel@xxxxx.xxx www
http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN.
------------------------------
Message: 16
Date: Mon, 10 Aug 2009 11:53:15 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
To: <vk3jed@xxxxx.xxx>, Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W46EE91B66A9010BC0AF9B4D6060@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
During its flight testing of the Delta Clipper vehicle I asked Bill Gaubatz
(spell last name) the program manager if the shape of the vehicle had been
tested toward re entry and his line was "A lot of times, go look at the
pictures from the Kwajalien atoll."
Robert WB5MZO
> Date: Mon, 10 Aug 2009 14:24:01 +1000
> To: amsat-bb@xxxxx.xxx
> From: vk3jed@xxxxx.xxx
> Subject: [amsat-bb] Re: New Cubesat - the Ultimate Fox Hunt
>
> At 01:41 PM 8/10/2009, you wrote:
> >I'm crunching numbers right now, but just thought of something
> >
> >ICBM's If we were to nuke RUSSIA or visa versa, while these yes do not
> >get to orbit, they do get to just shy of orbital velocity, and re enter
> >the atmosphere, did they have all these elaborate heat shields?
>
> I believe a lot of work on atmospheric entry (i.e. heat shielding)
> systems did actually start from the early days of ICBMs for this very
> reason. I don't think the speeds are that close to orbital speeds
> (one only needs to fall 3000 miles away, not 8000+), though they are
> high enough that the warheads must be designed to survive re-entry.
>
> There's a bit about ICBM re-entry systems on Wikipedia
>
> http://en.wikipedia.org/wiki/Atmospheric_reentry
>
>
> 73 de VK3JED / VK3IRL
> http://vkradio.com
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
_________________________________________________________________
Get back to school stuff for them and cashback for you.
http://www.bing.com/cashback?form=MSHYCB&publ=WLHMTAG&crea=TEXT_MSHYCB_BackToS
chool_Cashback_BTSCashback_1x1
------------------------------
Message: 17
Date: Mon, 10 Aug 2009 17:06:17 +0000
From: Douglas Anoman <danoman@xxxxx.xxxxxxxx.xxx>
Subject: [amsat-bb] logging software
To: <amsat-bb@xxxxx.xxx>
Message-ID: <COL108-W47B216D78898A6077CE944DA060@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello everyone,
I'm looking for a great logging software for my contacts, and i'm open
for suggestions.
Thank You
Douglas Anoman
KC9MLN
KC9MLN@xxxxx.xxx
Amsat #37043
------------------------------
Message: 18
Date: Mon, 10 Aug 2009 17:29:40 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: keps
To: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4A805904.9050804@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Here's another set that appears to be older than those I downloaded earlier
today.
What's going on here?
DRAGONSAT
1 35690U 09038B 09221.58001109 .00022257 00000-0 11595-3 0 107
2 35690 051.6383 032.1618 0005054 116.7075 243.4407 15.80837637 1590
ANDE DEB (POLLUX CYLIN)
1 35691U 09038C 09222.46664752 .00034589 00000-0 17845-3 0 111
2 35691 051.6384 027.5791 0003413 057.0919 303.0413 15.80784815 1705
ANDE DEB (CASTOR CYLIN)
1 35692U 09038D 09221.89656456 .00062187 00000-0 31126-3 0 146
2 35692 051.6376 030.5258 0003663 042.0778 318.0378 15.81179688 1616
ANDE POLLUX SPHERE
1 35693U 09038E 09221.39339426 .00020225 00000-0 10816-3 0 103
2 35693 051.6408 033.1665 0003810 064.3498 295.7927 15.80339104 1536
ANDE CASTOR SPHERE
1 35694U 09038F 09221.39463109 .00011172 00000-0 62215-4 0 113
2 35694 051.6417 033.1766 0004468 065.0578 295.0903 15.80055703 1533
ANDE DEB (AVIONICS DECK)
1 35695U 09038G 09222.27947176 .00025888 00000-0 13746-3 0 116
2 35695 051.6410 028.5856 0004587 066.3500 293.7943 15.80317174 1673
Nigel Gunn G8IFF/W8IFF wrote:
> DRAGONSAT
> 1 35690U 09038B 09221.89608423 +.00022175 +00000-0 +11546-3 0 00164
> 2 35690 051.6395 030.5236 0004962 117.8896 242.2609 15.80851730001648
> ANDE DEB (POLLUX CYLIN)
> 1 35691U 09038C 09221.70802767 +.00035012 +00000-0 +18101-3 0 00126
> 2 35691 051.6372 031.5130 0003278 060.5793 299.5342 15.80733597001589
> ANDE DEB (CASTOR CYLIN)
> 1 35692U 09038D 09221.70695586 +.00062797 +00000-0 +31457-3 0 00147
> 2 35692 051.6378 031.5075 0003507 047.1048 312.9989 15.81158879001585
> ANDE POLLUX SPHERE
> 1 35693U 09038E 09221.70956582 +.00019877 +00000-0 +10632-3 0 00114
> 2 35693 051.6401 031.5281 0003927 062.6051 297.5208 15.80349868001585
> ANDE CASTOR SPHERE
> 1 35694U 09038F 09221.71086029 +.00010853 +00000-0 +60531-4 0 00126
> 2 35694 051.6408 031.5388 0004491 065.1875 294.9492 15.80061125001583
> ANDE DEB (AVIONICS DECK)
> 1 35695U 09038G 09221.71034237 +.00026177 +00000-0 +13913-3 0 00128
> 2 35695 051.6404 031.5352 0004608 067.4387 292.6889 15.80288280001582
>
>
>
>
>
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.392 / Virus Database: 270.13.49/2293 - Release Date: 08/09/09
18:10:00
>
--
Nigel A. Gunn, 1865 El Camino Drive, Xenia, OH 45385-1115, USA. tel +1 937
825 5032
Amateur Radio G8IFF W8IFF (was KC8NHF), e-mail nigel@xxxxx.xxx www
http://www.ngunn.net
Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pigs QRP Club
International #385,
Dayton ARA #2128, AMSAT-NA LM-1691, AMSAT-UK 0182, MKARS, ALC,
GCARES, XWARN.
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 4, Issue 393
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