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CX2SA > SATDIG 03.08.12 21:13l 339 Lines 11872 Bytes #999 (0) @ WW
BID : AMSATBB7244
Read: GUEST
Subj: AMSAT-BB-digest V7 244
Path: IZ3LSV<IK2XDE<ON4HU<F6IQF<IK6ZDE<VE2PKT<F1BBI<CX2SA
Sent: 120803/1906Z @:CX2SA.SAL.URY.SA #:64343 [Salto] FBB7.00e $:AMSATBB7244
From: CX2SA@CX2SA.SAL.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: G-5500 alignment (Tom Gentry)
2. Health of Oscar 7 (VK2MAL Yahoo)
3. EM46 this weekend (Rick - WA4NVM)
4. AO-7B Performance 1005utc 3Aug2012 (John Papay)
5. Was AO-7B, now new High LEOs (Andrew Glasbrenner)
6. Re: Was AO-7B, now new High LEOs (Trevor .)
7. Re: Was AO-7B, now new High LEOs (Andrew Glasbrenner)
8. Commercial Spacecraft Development Awards Announced (B J)
9. No tune in transmit on FT-726 (Tom Gentry)
----------------------------------------------------------------------
Message: 1
Date: Thu, 02 Aug 2012 23:22:02 -0500
From: Tom Gentry <t.gentry@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: G-5500 alignment
Message-ID: <501B51EA.7080609@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
On 8/2/2012 2:00 PM, amsat-bb-request@xxxxx.xxx wrote:
> I had a 5500 azmith rotator lockup over winter. I finally had time to
> take it down and find the problem. Now a different problem. I forgot to
> mark the housing position before separating the upper/lower azmith
> assemblies. I think I know where it was pointed, but how can I tell
> where it should be aligned? Is this really a non issue?
It really is an issue as to how it goes back together because of the way
the AZ and EL motors are mounted on the L-bracket.
You can tell which way the top should go on by connecting the motor and
the pot to the controller box and stopping it at zero (N). Then install
the case so that the limit dog is exactly halfway between the limit
switches. That should have the cross boom pointing east and west and
the antennas pointing north.
73,
Tom
------------------------------
Message: 2
Date: Fri, 3 Aug 2012 19:27:09 +1000
From: VK2MAL Yahoo <vk2mal@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Health of Oscar 7
Message-ID: <E7D8CCDC-7AD7-4A39-B45D-6A834CB64AD3@xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Oscar 7 has been sounding rather rough on the edges the last few passes in
mode B.
Signals were more distorted then sounding FM.
All stations here in VK were using low power and there was only one QSO at a
time going through the transponder with our usual round table discussion.
Don't know if anyone can comment on there experience with her lately and on
how she is going?
73's
Mal - VK2MAL
------------------------------
Message: 3
Date: Fri, 3 Aug 2012 05:18:07 -0500
From: "Rick - WA4NVM" <wa4nvm@xxxxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] EM46 this weekend
Message-ID: <CD14D5B1D9854F9BB54AEA0FC423D4C6@xxxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Anyone that needs to confirm grid square EM46, I will be there until Monday,
Aug 6th. FM birds only.
I will leave Memphis mid morning today.
73,
Rick WA4NVM
------------------------------
Message: 4
Date: Fri, 03 Aug 2012 08:28:48 -0400
From: John Papay <john@xxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] AO-7B Performance 1005utc 3Aug2012
Message-ID: <539056.8253.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
AO-7B continues to struggle along. This mornings
1005utc pass was no exception. No signals were heard
from Europe and I could not hear my downlink until the
satellite was over 15 degrees. Low power up on cw
produced key clicks in the downlink. Surprisingly, higher
power started to produce a tone along with the key clicks.
On voice the downlink was distorted with low power. Again,
higher power produced more audio and less distortion. I only
heard one station sending dah's but very weak. AO-7 seems
to have good passes and not so good passes. You just have
to keep trying and hope to find a good one.
73,
John K8YSE
------------------------------
Message: 5
Date: Fri, 3 Aug 2012 09:13:59 -0400 (GMT-04:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: John Papay <john@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Was AO-7B, now new High LEOs
Message-ID:
<5892567.1343999640545.JavaMail.root@xxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks for the report John. I was also on that pass, and concur with your
observations, except I did hear two stations on voice repeating their calls,
maybe trying to find themselves. Let's hope this is temporary, and due to
bad solar angles or such. However, long term, every day AO-7 continues to
tick is a gift. Eventually she'll degrade to unusability, or just quit
altogether.
Along the same lines of thought, FO-29 is long in the tooth as well, even
though it's current performance is stellar.HO-68 was a worthy replacement
for FO-29, but we know how that ended.
As you well know, these two satellites are the backbone of the fleet at the
moment. While I am extremely anxious to see everything on the next Dnepr
launch fly and work well (FunCube, UKCube, Triton 1 and 2, etc...), the
orbit isn't optimal for range and DX. The FOX satellites will likely be in
similar orbits, although that is not known for sure yet. While it is
important these satellites fly, and when they do they will fill important
roles, I still think we really need some good DX LEOs. Launches of US and
European small satellites are hamstrung by orbital debris rules requiring
reentry in so many years.
What's the solution? There are several. Look for launches to elliptical
orbits with high apogees (like the recent Vega launch). Support projects
from countries that do not participate in the orbital debris restrictions
(India, Japan, China, Russia, etc.)as well as the lower altitude projects. I
cringe every time a so-called "amateur" bird launches to 800 to 1700km from
one of those countries with no two way package, especially when they are
10-40kg!. Look for piggyback opportunities to higher orbits. Develop
propulsion and reentry measures to allow deorbit from higher altitudes after
mission end. Pray for P3E to find a launch and funding to cover it.
I'm not trying to be negative, just realistic in how we need to look for
these opportunities before it's too late. I'm not knocking any current
program; in fact I've donated heavily to Fox and FunCube. I'm just looking
down the road to where we are headed.
73, Drew KO4MA
-----Original Message-----
>From: John Papay <john@xxxxxx.xxx>
>Sent: Aug 3, 2012 8:28 AM
>To: amsat-bb@xxxxx.xxx
>Subject: [amsat-bb] AO-7B Performance 1005utc 3Aug2012
>
>AO-7B continues to struggle along. This mornings
>1005utc pass was no exception. No signals were heard
>from Europe and I could not hear my downlink until the
>satellite was over 15 degrees. Low power up on cw
>produced key clicks in the downlink. Surprisingly, higher
>power started to produce a tone along with the key clicks.
>On voice the downlink was distorted with low power. Again,
>higher power produced more audio and less distortion. I only
>heard one station sending dah's but very weak. AO-7 seems
>to have good passes and not so good passes. You just have
>to keep trying and hope to find a good one.
>73,
>John K8YSE
>
>_______________________________________________
>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: 6
Date: Fri, 3 Aug 2012 15:00:15 +0100 (BST)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Was AO-7B, now new High LEOs
Message-ID:
<1344002415.27939.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
--- On Fri, 3/8/12, Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx> wrote:
> I still think we really need some good DX LEOs.
Agreed, getting something into an orbit of 1250 to 2500 km is key (and
having an SDX transponder that can survive the higher radiation levels).
Yes some launches such as the recent VEGA are into elliptical orbits BUT
they have very short lifetimes before burn-up, I think the VEGA orbit is
only 2 years. Ideally we'd want an elliptical orbit that would last 15-20
years I don't think any standard launches do that.
A number of CubeSats are expected to test a means of getting to higher
orbits in the coming year:
http://www.uk.amsat.org/5153
http://www.uk.amsat.org/9165
http://www.uk.amsat.org/9268
The costs of buying a launch to an orbit we'd like will likely remain
prohibitive so it looks like we need to develop our own propulsion to take
us from a "cheap launch" orbit at 350 or 700 km to one above 1250 km that'll
permit DX working.
73 Trevor M5AKA
------------------------------
Message: 7
Date: Fri, 3 Aug 2012 10:27:10 -0400 (GMT-04:00)
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
To: "Trevor ." <m5aka@xxxxx.xx.xx>, amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Was AO-7B, now new High LEOs
Message-ID:
<6254052.1344004030686.JavaMail.root@xxxxxxxxxxxxxx.xxx.xx.xxxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
>
>Yes some launches such as the recent VEGA are into elliptical orbits BUT
they have very short lifetimes before burn-up, I think the VEGA orbit is
only 2 years. Ideally we'd want an elliptical orbit that would last 15-20
years I don't think any standard launches do that.
>
>
>The costs of buying a launch to an orbit we'd like will likely remain
prohibitive so it looks like we need to develop our own propulsion to take
us from a "cheap launch" orbit at 350 or 700 km to one above 1250 km that'll
permit DX working.
>
I think we'll find it easier to raise perigee of a short lived elliptical a
bit, rather than raising a low circular to a stable high LEO or elliptical.
But, I don't know for sure. I'm a geologist, a rock scientist, not a rocket
scientist!
AND! the propulsion depends on 3 axis control, which seems to be worked out
well commercially now for 3U cubesats.
73, Drew
------------------------------
Message: 8
Date: Fri, 3 Aug 2012 14:57:00 +0000
From: B J <va6bmj@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Commercial Spacecraft Development Awards Announced
Message-ID:
<CAP7QzkPR-u9h37tCoDt=W16n4oJut+McQ9g1YMs7mU-UCkpkiA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
http://www.nasa.gov/home/hqnews/2012/aug/HQ_12-263_CCiCAP_Awards.html
http://www.parabolicarc.com/2012/08/03/boeing-spacex-and-sierra-nevada-win-com
mercial-crew-awards/
http://www.parabolicarc.com/2012/08/03/boeing-statement-on-nasa-commercial-cre
w-award/
http://www.parabolicarc.com/2012/08/03/sierra-nevada-hails-nasa-ccicap-award/
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 9
Date: Fri, 03 Aug 2012 12:35:56 -0500
From: Tom Gentry <t.gentry@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] No tune in transmit on FT-726
Message-ID: <501C0BFC.30300@xxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Mystery is solved. The Repeater offset switch MUST be in Simplex for
this to operate correctly.
73,
Tom K5VOU
On 8/2/2012 2:00 PM, amsat-bb-request@xxxxx.xxx wrote:
> My Operators manual for the FT-726R instructs me to tune the receiver
> while transmitting to the satellite in order to listen for my down
> link. However on my 726, the RX tuning is locked while in transmit,
> duplex or otherwise. Is there a mod necessary or is this a software
> change made after mine was built? Looking for clues from 726 users. Thanks.
------------------------------
_______________________________________________
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 7, Issue 244
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