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CX2SA > SATDIG 05.09.13 01:41l 891 Lines 32691 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: A0 40 replacement (John Becker)
2. Say "Hi" To Juno (Callsign end's with "F") (Les Rayburn)
3. Re: FUNcube-1 is in its POD (PE0SAT | Amateur Radio)
4. Re: A0 40 replacement (Michael)
5. Re: A0 40 replacement (Mike Seguin)
6. Re: A0 40 replacement (i8cvs)
7. Simon Brown - SDR-Radio v2.1 adds satellite support
(Matty Cunningham)
8. Re: A0 40 replacement (n0jy)
9. Re: A0 40 replacement (tosca005@xxx.xxxx
10. HEO satellite Haiku poem (Clayton Coleman)
11. Re: A0 40 replacement (Joe Fitzgerald)
12. Re: A0 40 replacement (Michael)
13. Re: A0 40 replacement (Paul Stoetzer)
14. Re: A0 40 replacement (Bryce Salmi)
----------------------------------------------------------------------
Message: 1
Date: Wed, 04 Sep 2013 14:06:19 -0500
From: John Becker <w0jab@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <522784AB.1020202@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 9/4/2013 12:43 PM, Gus wrote:
> Truly.
>
> However, to include operators with modest shacks, you need to allow
> operation on modes A, B and/or J. A satellite operating on 24.0 GHz
> won't be of interest to the average ham. Not until the average ham
> has 24.0 GHz capable antennas, feedlines, amplifiers, transceivers,
> etc, in his shack.
Are you trying to say that if one can not stand in their yard with a HT
they will not use it?
If that is the case go for it. (that would be fine with me)
I would like to see A B J and A as well as 24GHz.
I had not problem using AO 40 as many many other did.
I will 'never" support another FM only sat.
My reason for dropping out of AMSAT was no direction other then just that.
I put together not one but two stations equipment with FT847.
If your saying it's a money thing. You have got to pay to play.
Everyone should know it's not or ever has been a poor man's hobby.
You cant get a toy-auto to go 120 but my mustang will.
John, W0JAB
------------------------------
Message: 2
Date: Wed, 04 Sep 2013 14:12:28 -0500
From: Les Rayburn <les@xxxxxxxxxxxx.xxx>
To: AMSAT Mailing List <amsat-bb@xxxxx.xxx>, "vhf@xxxx.xxxxxxxx.xxxx
<vhf@xxxx.xxxxxxxx.xxx>
Subject: [amsat-bb] Say "Hi" To Juno (Callsign end's with "F")
Message-ID: <5227861C.50907@xxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I reached out to JPL to ask what the desired frequency for this
experiment would be if your amateur callsign ended in the letter "F".
Here's the response:
/Hi Les- What a strange thing for us to leave out! The omission will be
corrected in our next update of the page this week.
In the updated frequency table we will publish, F corresponds to 28.091 MHz.
Thanks for your interest in this activity!/
Cheers,
Preston Dyches
Solar system & technology public engagement NASA - Jet Propulsion Laboratory
MS 230-275
4800 Oak Grove Drive
Pasadena, CA 91109
--
--
73,
Les Rayburn, N1LF
121 Mayfair Park
Maylene, AL 35114
EM63nf
6M VUCC #1712
AMSAT #38965
Grid Bandits #222
Southeastern VHF Society
Central States VHF Society Life Member
Six Club #2484
Active on 6 Meters thru 1296, 10GHz & Light
------------------------------
Message: 3
Date: Wed, 04 Sep 2013 22:23:53 +0200
From: PE0SAT | Amateur Radio <pe0sat@xxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: FUNcube-1 is in its POD
Message-ID: <d6aa04666ddf9aa7431cbc9f40e7c6c6@xxxxx.xx>
Content-Type: text/plain; charset=UTF-8; format=flowed
Congratulations to the whole team, this is great news.
> The AMSAT FUNcube team are delighted to be able to announce that the
> FUNcube-1 CubeSat has now completed all its final testing and been
> placed into its launch POD.
>
> This work was completed during a three day programme at the premises
> of ISIS BV in Delft in the Netherlands and was finished, on time, late
> this afternoon.
>
> FUNcube-1 is actually the middle 1U CubeSat of three sharing a 3U
> ISIPOD. It is sharing the ISIPOD with ZACUBE-1 from South Africa and
> HINcube from Norway. ZACube-1, in addition to carrying VHF and UHF
> communications equipment also has a 20 metre beacon which will operate
> on 14.099MHz This ISIPOD, with the spacecraft inside, will be
> transported to Russia, early next month,for launch and will eventually
> be attached directly to the launch vehicle.
>
> FUNcube-1 carries a U/V linear transponder and the educational
> telemetry beacon using 1k2 BPSK for school outreach purposes.
>
> The current launch info has lift off scheduled for November 21st at
> 07:11:29 UTC
>
> Full intial orbit details and TLE?s, together with decoding sofwtare
> will be made available over the next few weeks
>
> best 73
>
> Graham G3VZV ? Wouter PA3WEG ? Jim G3WGM
73 Jan PE0SAT
--
With regards PE0SAT
Internet web-page http://www.pe0sat.vgnet.nl/
------------------------------
Message: 4
Date: Wed, 04 Sep 2013 17:25:08 -0400
From: Michael <Mat_62@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5227A534.1040605@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I'm almost fifty one years old and I'm now convinced that we will not
see another HEO in orbit in my lifetime...if ever. The economic
environment to do it just doesn't exist anymore. AMSAT has as much as
told everyone that by abandoning their efforts and concentrating on LEO
cubesats. No one is going to come out and say that we absolutely will
never have one, they like to keep that glimmer of hope alive but the
writing is on the wall. No one wants to be wrong more than I do but
I'd bet you P3-E never flies.
73,
Michael, W4HIJ
On 9/3/2013 3:32 PM, John Becker wrote:
> Anything new on a replacement.
> Have not see a thing myself.
>
> John
>
>
> _______________________________________________
> 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: 5
Date: Wed, 04 Sep 2013 17:27:09 -0400
From: Mike Seguin <n1jez@xxxxxxxxxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5227A5AD.50100@xxxxxxxxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
A HEO satellite with a 10 GHz downlink would be tons of fun. We've been
using these along with surplus DSS dishes using a Funcube as an IF to
create really cheap 10 GHz receivers that work well!
http://www.ebay.com/itm/LNB-Single-0-1dB-Satellite-Universal-Edition-Full-HD-S
ky-Freesat-TV-/181180214555?pt=UK_Sound_Vision_Satellite_LNBs&hash=item2a2f2ea
d1b
Watch the wrap...
Mike
On 9/4/2013 1:43 PM, Gus wrote:
> Truly.
>
> However, to include operators with modest shacks, you need to allow
> operation on modes A, B and/or J. A satellite operating on 24.0 GHz
> won't be of interest to the average ham. Not until the average ham has
> 24.0 GHz capable antennas, feedlines, amplifiers, transceivers, etc, in
> his shack.
>
> On 09/04/2013 11:31 AM, Bryce Salmi wrote:
>> Yea but increasing frequency helps with that. With directional
>> antennas the satellite would need attitude control which would benefit
>> greatly from miniaturization. For the most part, miniaturization would
>> come from incorporating systems on chips. Most op amps and
>> microcontrollers are much smaller than their packages so including
>> those systems on a single die in a single package are capable of
>> massive savings in space. This is what made smart phones even possible .
>>
>> Gus <8p6sm@xxxx.xxx> wrote:
>>
>> On 09/04/2013 02:26 AM, Brenton Salmi wrote:
>>
>> Let's put it in another possible context: Create an extremely
>> dense and reliable LEO platform in cube-sat form that weigh's
>> a fraction of AO-40's weight using today's high-density
>> components/systems and create a reliable and feature rich HEO
>> cubesat.
>>
>>
>>
>> The only problem with this, is that certain components can't be
>> miniaturized. Example: Antennas. And HEO satellites need more
>> sophisticated antennas.
>>
>> Pity the cube-sat idea didn't finish up with a ten INCH cube...
>>
>> --
>> 73, de Gus 8P6SM
>> Barbados, the easternmost isle.
>>
>> --------------------------------------------------------------------------
73,
Mike, N1JEZ
"A closed mouth gathers no feet"
------------------------------
Message: 6
Date: Wed, 4 Sep 2013 23:29:41 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "John Becker" <w0jab@xxxxxxxxx.xxx>, "AMSAT-BB"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <000901cea9b5$df22d620$0301a8c0@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "John Becker" <w0jab@xxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, September 04, 2013 9:06 PM
Subject: [amsat-bb] Re: A0 40 replacement
> I will 'never" support another FM only sat.
>
> My reason for dropping out of AMSAT was no direction other then just that.
>
> John, W0JAB
Hi John, W0JAB
I agree completely with you
73" de i8CVS Domenico
------------------------------
Message: 7
Date: Wed, 4 Sep 2013 22:55:32 +0100
From: Matty Cunningham <manxmat@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Simon Brown - SDR-Radio v2.1 adds satellite
support
Message-ID: <DUB123-DS130876E9C8B046E74EDD75AD320@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Simon Brown, creator of the original Ham Radio Deluxe software has been busy
with his SDR software.
The latest console release 30th August, v2.1, build 1494 now has support for
satellites, doppler shift is integrated, along with DDE rotator control,
link to software here:-
http://v2.sdr-radio.com/Download.aspx
This works very well with both versions of the FunCube Dongle.
Matty
MD0MAN
------------------------------
Message: 8
Date: Wed, 04 Sep 2013 17:09:26 -0500
From: n0jy <n0jy@xxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5227AF96.7030107@xxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Michael,
I would not say that AMSAT has abandoned HEO. Rather, launch
opportunities that exist now are being utilized. Would you rather sit
dormant and let all existing birds fail or re-enter while waiting for an
HEO opportunity?
And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
first. If we're going to fly HEO, we had better be good at building a
reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first
HEO launch opportunity is not the time to figure that out!
While HEO launch opportunities do not exist now, but that does not mean
that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT would
not build an HEO satellite when opportunities do come. In the meantime,
we are making lemonade and preparing through practice.
Jerry
N0JY
On 9/4/2013 4:25 PM, Michael wrote:
> I'm almost fifty one years old and I'm now convinced that we will not
> see another HEO in orbit in my lifetime...if ever. The economic
> environment to do it just doesn't exist anymore. AMSAT has as much as
> told everyone that by abandoning their efforts and concentrating on
> LEO cubesats. No one is going to come out and say that we absolutely
> will never have one, they like to keep that glimmer of hope alive but
> the writing is on the wall. No one wants to be wrong more than I do
> but I'd bet you P3-E never flies.
> 73,
> Michael, W4HIJ
>
> On 9/3/2013 3:32 PM, John Becker wrote:
>> Anything new on a replacement.
>> Have not see a thing myself.
>>
>> John
>>
>>
>> _______________________________________________
>> 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
>
> _______________________________________________
> 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: 04 Sep 2013 17:53:29 -0500
From: tosca005@xxx.xxx
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <Gophermail.2.0.1309041753290.18064@xxxx.xx.xxx.xxx>
Content-Type: text/plain; format=flowed; charset=UTF-8
As long as AMSAT-NA needs to concentrate on 1U/3U/6U Cubesats for the
immediatee future, I would really like to see the pursuit of linear
transponders on them instead of single-channel FM repeaters. The way I see
it, launch opportunities are so rare that we ought to fly the most capable
equipment we can on those rare occasions when we can get a launch.
John Toscano
W0JT
Amsat-Na LM#2292
On Sep 4 2013, n0jy wrote:
>Hi Michael,
>
>I would not say that AMSAT has abandoned HEO. Rather, launch
>opportunities that exist now are being utilized. Would you rather sit
>dormant and let all existing birds fail or re-enter while waiting for an
>HEO opportunity?
>And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
>first. If we're going to fly HEO, we had better be good at building a
>reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first
>HEO launch opportunity is not the time to figure that out!
>While HEO launch opportunities do not exist now, but that does not mean
>that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT would
>not build an HEO satellite when opportunities do come. In the meantime,
>we are making lemonade and preparing through practice.
>
>Jerry
>N0JY
>
>On 9/4/2013 4:25 PM, Michael wrote:
>> I'm almost fifty one years old and I'm now convinced that we will not
>> see another HEO in orbit in my lifetime...if ever. The economic
>> environment to do it just doesn't exist anymore. AMSAT has as much as
>> told everyone that by abandoning their efforts and concentrating on
>> LEO cubesats. No one is going to come out and say that we absolutely
>> will never have one, they like to keep that glimmer of hope alive but
>> the writing is on the wall. No one wants to be wrong more than I do
>> but I'd bet you P3-E never flies.
>> 73,
>> Michael, W4HIJ
>>
>> On 9/3/2013 3:32 PM, John Becker wrote:
>>> Anything new on a replacement.
>>> Have not see a thing myself.
>>>
>>> John
>>>
>>>
>>> _______________________________________________
>>> 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
>>
>> _______________________________________________
>> 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
>>
>>
>
>_______________________________________________
>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: 10
Date: Wed, 4 Sep 2013 18:15:23 -0500
From: Clayton Coleman <kayakfishtx@xxxxx.xxx>
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] HEO satellite Haiku poem
Message-ID:
<CAPovOwesGV2ts5aZB__QhDUxpaiNBuiag4GGufNU3zNSg3szSw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
AO-40 premature death
Sob-sob Boo-hoo
I want, I want, I want.
(amateurish, I know)
73
Clayton
W5PFG
------------------------------
Message: 11
Date: Wed, 04 Sep 2013 19:22:44 -0400
From: Joe Fitzgerald <jfitzgerald@xxxx.xxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5227C0C4.2000805@xxxx.xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 9/4/2013 6:53 PM, tosca005@xxx.xxx wrote:
> As long as AMSAT-NA needs to concentrate on 1U/3U/6U Cubesats for the
> immediatee future, I would really like to see the pursuit of linear
> transponders on them instead of single-channel FM repeaters. The way I
> see it, launch opportunities are so rare that we ought to fly the most
> capable equipment we can on those rare occasions when we can get a
> launch.
>
>
We sure have linear transponders in the Fox pipeline. Fox-1 has a lot
of engineering work for basics like spacecraft structure, IHU, power and
so on, so "simpler is better" is the guiding phrase for RF. Later
spacecraft in the Fox series will not need to repeat the basic
spacecraft work, so we can focus engineering efforts on fancier RF payloads.
-Joe
------------------------------
Message: 12
Date: Wed, 04 Sep 2013 19:26:58 -0400
From: Michael <Mat_62@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID: <5227C1C2.6040502@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I don't fault AMSAT one bit for building LEO cubesats. They are facing
the reality of no HEO launches and there's nothing wrong with that. We
have to have something up there or this whole branch of the hobby will
die. I'm a bit disappointed that they chose to make Fox-1 yet another
flying FM repeater and not a linear bird but that's beside the point of
this discussion. I just don't think HEO launches are EVER going to be
available again and I think telling people "well maybe someday" is just
false hope.
73,
Michael, W4HIJ
On 9/4/2013 6:09 PM, n0jy wrote:
> Hi Michael,
>
> I would not say that AMSAT has abandoned HEO. Rather, launch
> opportunities that exist now are being utilized. Would you rather sit
> dormant and let all existing birds fail or re-enter while waiting for
> an HEO opportunity?
> And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is
> a first. If we're going to fly HEO, we had better be good at building
> a reliable satellite in a cubesat (be it 1, 3, or 6U) format. The
> first HEO launch opportunity is not the time to figure that out!
> While HEO launch opportunities do not exist now, but that does not
> mean that AMSAT isn't pursuing them as Drew pointed out, nor that
> AMSAT would not build an HEO satellite when opportunities do come. In
> the meantime, we are making lemonade and preparing through practice.
>
> Jerry
> N0JY
>
> On 9/4/2013 4:25 PM, Michael wrote:
>> I'm almost fifty one years old and I'm now convinced that we will not
>> see another HEO in orbit in my lifetime...if ever. The economic
>> environment to do it just doesn't exist anymore. AMSAT has as much as
>> told everyone that by abandoning their efforts and concentrating on
>> LEO cubesats. No one is going to come out and say that we absolutely
>> will never have one, they like to keep that glimmer of hope alive but
>> the writing is on the wall. No one wants to be wrong more than I do
>> but I'd bet you P3-E never flies.
>> 73,
>> Michael, W4HIJ
>>
>> On 9/3/2013 3:32 PM, John Becker wrote:
>>> Anything new on a replacement.
>>> Have not see a thing myself.
>>>
>>> John
>>>
>>>
------------------------------
Message: 13
Date: Wed, 4 Sep 2013 19:33:39 -0400
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: tosca005@xxx.xxx
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID:
<CABzOSOpRKr5uV=yqRKdKy+V9D1s=qSJBBw19qdBRbRwEPSGO-w@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The Fox Phase 2 satellites are supposed to carry software defined
transponders like the one on ARISSat-1. They will be able to accommodate
any mode we can dream of. Assuming all of the currently scheduled launches
go well and what we have continues to function, we'll have several linear
transponders in orbit (AO-7, FO-29, VO-52, FunCube-1, UKube-1, Delfi-N3xt).
What I'd like to see is a satellite or two in a similar orbit as AO-7 or
some of the RS satellites. The only possibility for DX contacts right now
are on birds that are 39 (AO-7) and 18 (FO-29) years old.
A nice goal for AMSAT would be to put a linear transponder in an orbit that
would realistically allow anyone in the United States with a decent station
to work WAS. Theoretically it is possible for me to work Hawaii from here
in DC on AO-7, but I certainly don't see that happening any time soon!
As far as "graduating" hams from the FM satellites to linear transponders,
I think what's needed is some better resources that describe just how easy
it can be. It doesn't have to cost very much at all. I know a lot of hams
are on the FM satellites with FT-817s. To get on the linear satellites from
that, all they need to add is something to receive VHF and/or UHF SSB (and
if you have to choose, choose VHF since I believe all of the planned linear
transponder satellites are Mode B). The 1990 ARRL Satellite Experimenters
Handbook describes lots of ways to get on the satellites at low cost. My
downlink receiver is an Icom IC-R10 that I got for about $200 on eBay. As
far as tuning for Doppler, I heard someone on a pass last night when I was
tuning around saying that computer control was "necessary" for the linear
transponders. It does take some practice, but I know I get better at it
every time I work a pass. For me, it's more trouble than it's worth since I
have to operate portable and setting up my netbook is an extra step that I
don't really need, Actually, tuning for Doppler is kind of fun!
73,
Paul Stoetzer, N8HM
Washington, DC
AMSAT-NA #38,913
On Wed, Sep 4, 2013 at 6:53 PM, <tosca005@xxx.xxx> wrote:
> As long as AMSAT-NA needs to concentrate on 1U/3U/6U Cubesats for the
> immediatee future, I would really like to see the pursuit of linear
> transponders on them instead of single-channel FM repeaters. The way I see
> it, launch opportunities are so rare that we ought to fly the most capable
> equipment we can on those rare occasions when we can get a launch.
>
> John Toscano
> W0JT
> Amsat-Na LM#2292
>
> On Sep 4 2013, n0jy wrote:
>
> Hi Michael,
>>
>> I would not say that AMSAT has abandoned HEO. Rather, launch
>> opportunities that exist now are being utilized. Would you rather sit
>> dormant and let all existing birds fail or re-enter while waiting for an
>> HEO opportunity?
>> And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
>> first. If we're going to fly HEO, we had better be good at building a
>> reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first HEO
>> launch opportunity is not the time to figure that out!
>> While HEO launch opportunities do not exist now, but that does not mean
>> that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT would
>> not build an HEO satellite when opportunities do come. In the meantime, we
>> are making lemonade and preparing through practice.
>>
>> Jerry
>> N0JY
>>
>>
>> On 9/4/2013 4:25 PM, Michael wrote:
>>
>>> I'm almost fifty one years old and I'm now convinced that we will not
>>> see another HEO in orbit in my lifetime...if ever. The economic
>>> environment to do it just doesn't exist anymore. AMSAT has as much as told
>>> everyone that by abandoning their efforts and concentrating on LEO
>>> cubesats. No one is going to come out and say that we absolutely will
>>> never have one, they like to keep that glimmer of hope alive but the
>>> writing is on the wall. No one wants to be wrong more than I do but I'd
>>> bet you P3-E never flies.
>>> 73,
>>> Michael, W4HIJ
>>>
>>> On 9/3/2013 3:32 PM, John Becker wrote:
>>>
>>>> Anything new on a replacement.
>>>> Have not see a thing myself.
>>>>
>>>> John
>>>>
>>>>
>>>> ______________________________**_________________
>>>> 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<http://amsat.org/mailman/listinfo
/amsat-bb>
>>>>
>>>
>>> ______________________________**_________________
>>> 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<http://amsat.org/mailman/listinfo
/amsat-bb>
>>>
>>>
>>>
>> ______________________________**_________________
>> 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!
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Message: 14
Date: Wed, 4 Sep 2013 16:33:46 -0700
From: Bryce Salmi <bstguitarist@xxxxx.xxx>
To: n0jy <n0jy@xxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: A0 40 replacement
Message-ID:
<CAN5j0soKEMqxfwvXqp+RDQviGB_49NWbO9SBSD6w52YgTwXZXQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
>
> I would not say that AMSAT has abandoned HEO. Rather, launch
> opportunities that exist now are being utilized. Would you rather sit
> dormant and let all existing birds fail or re-enter while waiting for an
> HEO opportunity?
> And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
> first. If we're going to fly HEO, we had better be good at building a
> reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first HEO
> launch opportunity is not the time to figure that out!
> While HEO launch opportunities do not exist now, but that does not mean
> that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT would
> not build an HEO satellite when opportunities do come. In the meantime, we
> are making lemonade and preparing through practice.
I cannot agree with this more. The reality is that LEO launch opportunities
exist right now for an affordable price that AMSAT can pay (free to ~$150K)
for satellites that are 1U cubesats. Any larger and it becomes much more
expensive. AMSAT could potentially pull of a HEO launch if a 3U or so
cubesat but I would imagine a decently sized fundraising campaign would be
needed to approach that. Anything bigger than cubesats is likely out of the
range of an organization such as AMSAT for a while (Unless reusable launch
vehicles becomes a reality <https://www.youtube.com/watch?v=2t15vP1PyoA>).
There's a silver lining that people are neglecting (and those of us
volunteering for AMSAT should probably do a better job publicizing
this...). This silver lining is that without necessity, technology would
never move forward. We are now forced to build LEO cubesats if we want to
fly anything soon. That's a fact of life. By developing a reliable cubesat
that is technology dense with smaller components and systems on a chip and
placing it into LEO we obtain a flight heritage and incremental
improvements with design. This also gives volunteers/engineers the
experience with the satellite design. *There is merit in attempting to pack
all the technology that is found on a traditional HEO bird into a small
cubesat*. I mean seriously, we have smartphones nowadays that are faster
than supercomputers were just several decades ago.
When that HEO opportunity comes up.* A proven LEO satellite with flight
heritage will be much more reliable and economical to upgrade for the task*.
It is for this reason that the path AMSAT-NA is currently embarking on is a
very smart one for the current aerospace industry. Any Fox satellite
designed and operated for it's 5+ year mission will give a huge leap of
flight heritage to the design, especially in regards to radiation and
environmental concerns. A HEO satellite will need to be extremely robust,
more so than LEO as it will experience more radiation.
So LEO satellites are fun to most of us but they do offer an extremely
limited usable pass,even at best (especially FM). However, there are many
subsystems on an FM LEO that would be very similar to a Linear Transponder
HEO satellite.* You still need a computer (IHU), you still need a solar
converter (MPPT), you still need to support any experiments (cameras,
sensors, etc). So, by having a reliable and flight proven LEO family of
satellites, you just set yourself up for a HEO mission with limited
redesign.*
This also plays into the whole role of launch providers. Just because you
can afford a launch doesn't mean you will get it. Let's say AMSAT obtained
a ride to GTO on the next Direct TV satellite to launch. Direct TV is the
primary payload and any secondary payloads MUST prove that they will not in
any way jeapordize the primary payload. If AMSAT was unable to prove that
its satellite will not affect the primary payload, AMSAT would likely not
get to fly.
Anyways, these are my thoughts on the issue. I'll toy around with the idea
of getting some better material for the AMSAT-NA website to explain some of
the difficulties AMSAT faces. There really is a need for a better
explanation so we can avoid consistently explaining similar responses to
similar questions.
Enjoy!
Bryce
KB1LQC
On Wed, Sep 4, 2013 at 3:09 PM, n0jy <n0jy@xxxx.xxx> wrote:
> Hi Michael,
>
> I would not say that AMSAT has abandoned HEO. Rather, launch
> opportunities that exist now are being utilized. Would you rather sit
> dormant and let all existing birds fail or re-enter while waiting for an
> HEO opportunity?
> And AMSAT is just learning to build cubesats. For AMSAT-NA, Fox-1 is a
> first. If we're going to fly HEO, we had better be good at building a
> reliable satellite in a cubesat (be it 1, 3, or 6U) format. The first HEO
> launch opportunity is not the time to figure that out!
> While HEO launch opportunities do not exist now, but that does not mean
> that AMSAT isn't pursuing them as Drew pointed out, nor that AMSAT would
> not build an HEO satellite when opportunities do come. In the meantime, we
> are making lemonade and preparing through practice.
>
> Jerry
> N0JY
>
>
> On 9/4/2013 4:25 PM, Michael wrote:
>
>> I'm almost fifty one years old and I'm now convinced that we will not see
>> another HEO in orbit in my lifetime...if ever. The economic environment to
>> do it just doesn't exist anymore. AMSAT has as much as told everyone that
>> by abandoning their efforts and concentrating on LEO cubesats. No one is
>> going to come out and say that we absolutely will never have one, they like
>> to keep that glimmer of hope alive but the writing is on the wall. No one
>> wants to be wrong more than I do but I'd bet you P3-E never flies.
>> 73,
>> Michael, W4HIJ
>>
>> On 9/3/2013 3:32 PM, John Becker wrote:
>>
>>> Anything new on a replacement.
>>> Have not see a thing myself.
>>>
>>> John
>>>
>>>
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>>
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>>
>>
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------------------------------
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End of AMSAT-BB Digest, Vol 8, Issue 294
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