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CX2SA > SATDIG 05.05.11 21:07l 599 Lines 19220 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Portable satellite antenna (KM9U)
2. Re: Portable Sat Antenna (Clint Bradford)
3. Re: so67 (Ib Christoffersen)
4. Re: Cables for small satellites (Graham Shirville)
5. Re: Portable satellite antenna (Bob Bruninga)
6. Re: 6th Aniversary of HAMSAT- VO 52 (Peter Portanova)
7. Re: Portable satellite antenna (Matt Patterson)
8. Re: Portable satellite antenna (Alexander Sack)
9. Re: Portable satellite antenna (Randy Hall)
10. Re: SO-67 Question (Johann Lochner)
11. Re: 6th Aniversary of HAMSAT- VO 52 (Jan H. van Gils)
----------------------------------------------------------------------
Message: 1
Date: Thu, 5 May 2011 01:15:04 -0400
From: "KM9U" <arskm9u@xxxxx.xxx>
Subject: [amsat-bb] Re: Portable satellite antenna
To: "Alexander Sack" <pisymbol@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <607BABDB308441D9BF7C2B711359B4E5@xxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
The Arrow antenna will be a good choice. The very first contact I made after
receiving my Arrow antenna was with Col. Doug Wheelock aboard the ISS on
July 14, 2010. I was using a Kenwood Th-F6a HT @ 5w output with my new Arrow
II.
The Arrow is not the only choice, but I think many will agree that it is a
good choice for portable operations.
Welcome to the wonderful world of amateur satellite communications!
Chuck, KM9U
----- Original Message -----
From: "Alexander Sack" <pisymbol@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, May 04, 2011 22:27
Subject: [amsat-bb] Portable satellite antenna
> AMSAT-BB:
>
> I am a relatively new ham (1.5 months) and I have caught the satellite
> bug. I own a Kenwood TH-D72A which from reading this list and some
> others is a great little HT to operate satellites.
>
> The issue is an antenna. I live in an antenna restricted area so I am
> not sure what to do.
>
> I have read about the Arrow Antenna:
>
> http://www.arrowantennas.com/arrowii/146-437.html
>
> My goal is to work minimally the ISS! :-)
>
> Can folks suggest a portable setup that could work with my HT? Or are
> my expectations too high?
>
> 73
>
> -aps (KC2ZSX)
> _______________________________________________
> 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: 2
Date: Wed, 4 May 2011 22:16:19 -0700
From: Clint Bradford <clintbrad4d@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Portable Sat Antenna
To: amsat-bb@xxxxx.xxx
Message-ID: <FC4755F5-F1B8-481A-A651-DE16882783C2@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> ... Can folks suggest a portable setup that could work with my HT? Or are
my expectations too high?
Not at all. COMPLETE info for workin' the FM birds with your HT right here ...
http://www.work-sat.com
Clint, K6LCS
909-241-7666 - cell
------------------------------
Message: 3
Date: Thu, 5 May 2011 10:29:17 +0200
From: "Ib Christoffersen" <oz1my@xxxxxx.xx>
Subject: [amsat-bb] Re: so67
To: "'mm0kjg'" <mm0kjg@xxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <D6.E5.21410.DDF52CD4@xxxxx.xxxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Kev,
It is back on. This week over the Americas.
Next week over Europe starting Monday.
That is at last the plan.
73 OZ1MY/Ib
-----Oprindelig meddelelse-----
Fra: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx P? vegne
af mm0kjg
Sendt: 4. maj 2011 17:57
Til: amsat-bb@xxxxx.xxx
Emne: [amsat-bb] so67
Hi there.
Can anyone tell me if so67 is back on air for amateur use yet. I read on the
http://www.amsatsa.org.za/ site
that it's getting used for other mean's.
"Amateur Radio operation on SO67 will be suspended from 18 April for a
period to allow SunSpace to carry out tests on world-wide basis using the
transponder that normally carries the amateur operation. The initial test
period will be one month but may be longer if additional tests are
required."
I thought I read on here that it was back on for amateur use?
Cheers Kev De MM0KJG
_______________________________________________
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: 4
Date: Thu, 5 May 2011 12:53:25 +0100
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Cables for small satellites
To: "CubeSat @ CubeSat.org" <cubesat@xxxxxxx.xxx>, "AMSAT BB"
<amsat-bb@xxxxx.xxx>
Message-ID: <677EDEC4F66F41BC80F5174779DAA2BF@xxxxxxx.xxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi All,
Many thanks to the kind experts who kindly sent us information in repect to
this enquiry a couple of weeks ago.
For FUNcube we have determined that the best coax for our purposes is RG178.
The following reasons:
we are only concerned with VHF and UHF signals
flight heritage
small diameter
small minimum bend radius
suitability for a variety of connectors - we are using MCX, MMCX and SSMCX
connectors on different boards (for good reasons of course)
Lessons learnt and advice received included:
RG178 should not be used outside a spacecraft where it might be exposed to
UV
The cables will need retaining in some way to resist viabration during
launch - glue to board or "tie" to structure.
The connectors will also need to be glued together before flight
It may be peferable/more reliable to solder cables directly to boards for
flight models.
All connectors are designed for a limited number of insertions. Therefore
"saver" cable/connector assemblies should be used during most of the
testing/verification programme.
There is a range of extra flexible semi-rigid cables available. (Thats
sounds confused)
Like all COTS items used in space, the minimum bend radius rule of thumb - 6
times the outer diameter - should be derated if possible.
again thanks an apologies for the delay in getting the results back out:)
73
Graham
G3VZV
A simple question this time!
What is the best coax cable to use in a cubesat? Size, flexibility/min
radius,
existing space heritage, ease of applying connectors are our main design
drivers
- we are only using UHF and VHF so losses are not going to be too much of a
problem hopefully..
many thanks in advance
73
Graham
G3VZV
------------------------------
Message: 5
Date: Thu, 5 May 2011 08:06:48 -0400
From: "Bob Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: Portable satellite antenna
To: "'Alexander Sack'" <pisymbol@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <02e601cc0b1c$e8dbf1e0$ba93d5a0$@xxx>
Content-Type: text/plain; charset="US-ASCII"
> The issue is an antenna. I live in an antenna
> restricted area so I am not sure what to do.
> My goal is to work minimally the ISS! :-)
> I own a Kenwood TH-D72A
Walk outside during a pass. Have the radio configured and working for
normal APRS. Then just change from 144.39 (APRS) to 145.825 and you should
see everything from the ISS. No need for anything other than the rubber
duck antenna.
You can confirm the ISS is in APRS mode by checking the age of packets on
this site:
www.ariss.net. As of right now, it appears the packets are less than an
hour old, so clearly the ISS APRS downlink is on and working.
You can try to send a few packets, but with the rubber-duck you won't make
it in. With a full sized 19" whip you can make it (but only if you have the
uplink all to yourself). Of course, the arrow antenna should do it fine.
But there are two other approaches.
1) A simple dipole held horizontal 18" above a ground plane of some kind.
Chicken wire, rabbit fencing, should be about 4' square or so. This should
give you about 5 dBi gain. Then you should be able to get in during the
center 2 minutes of the overhead pass each day.
2) Use the same ground plane above, and install a 58" vertical whip antenna
on it. That antenna will give almost 7 dBi gain when the ISS is above 30
degrees (center 2 minutes of an overhead pass).
When you TX and see the radio flash "MY POSITION", then you know you got in
and everyone else saw you too. Or send an email to yourself using the APRS
message feature.
Good luck!
Bob, WB4aPR
------------------------------
Message: 6
Date: Thu, 05 May 2011 08:42:57 -0400
From: "Peter Portanova" <wb2oqq@xxxxxxx.xxx>
Subject: [amsat-bb] Re: 6th Aniversary of HAMSAT- VO 52
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <08B05D16F7A44600A944F859B4D3BF00@xxxx>
Content-Type: text/plain; format=flowed; charset=iso-8859-1;
reply-type=original
Mani,
Congratulations, and many more orbits!
We also want to acknowledge the government of India for supporting the
construction and launch of VO-52 as a result of the emergency communications
UO-14 provided after the 2001 Gujarat earthquake. We enjoy satellite
communications as a hobby, however we should never fail to realize it's
potential when an event causes on the ground communication's to be
disrupted.
73's Pete
WB2OQQ
------------------------------
Message: 7
Date: Thu, 05 May 2011 08:16:43 -0500
From: Matt Patterson <mattpatt@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Portable satellite antenna
To: amsat-bb@xxxxx.xxx
Message-ID: <4DC2A33B.9050705@xxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Back when I used to get on the ISS APRS all I used was a j-pole
antenna. It might not be the best but I never had a problem getting in.
73 Matt
W5LL
On 5/5/2011 7:06 AM, Bob Bruninga wrote:
>> The issue is an antenna. I live in an antenna
>> restricted area so I am not sure what to do.
>> My goal is to work minimally the ISS! :-)
>> I own a Kenwood TH-D72A
>>
> Walk outside during a pass. Have the radio configured and working for
> normal APRS. Then just change from 144.39 (APRS) to 145.825 and you should
> see everything from the ISS. No need for anything other than the rubber
> duck antenna.
>
> You can confirm the ISS is in APRS mode by checking the age of packets on
> this site:
> www.ariss.net. As of right now, it appears the packets are less than an
> hour old, so clearly the ISS APRS downlink is on and working.
>
> You can try to send a few packets, but with the rubber-duck you won't make
> it in. With a full sized 19" whip you can make it (but only if you have the
> uplink all to yourself). Of course, the arrow antenna should do it fine.
> But there are two other approaches.
>
> 1) A simple dipole held horizontal 18" above a ground plane of some kind.
> Chicken wire, rabbit fencing, should be about 4' square or so. This should
> give you about 5 dBi gain. Then you should be able to get in during the
> center 2 minutes of the overhead pass each day.
>
> 2) Use the same ground plane above, and install a 58" vertical whip antenna
> on it. That antenna will give almost 7 dBi gain when the ISS is above 30
> degrees (center 2 minutes of an overhead pass).
>
> When you TX and see the radio flash "MY POSITION", then you know you got in
> and everyone else saw you too. Or send an email to yourself using the APRS
> message feature.
>
> Good luck!
> Bob, WB4aPR
>
>
> _______________________________________________
> 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: 8
Date: Thu, 5 May 2011 09:20:38 -0400
From: Alexander Sack <pisymbol@xxxxx.xxx>
Subject: [amsat-bb] Re: Portable satellite antenna
To: Bob Bruninga <bruninga@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <BANLkTimM8AqePoxO3pyCAGx5_qKDfDk9pQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Thu, May 5, 2011 at 8:06 AM, Bob Bruninga <bruninga@xxxx.xxx> wrote:
>> The issue is an antenna. ?I live in an antenna
>> restricted area so I am not sure what to do.
>> My goal is to work minimally the ISS! :-)
>> I own a Kenwood TH-D72A
>
> Walk outside during a pass. ?Have the radio configured and working for
> normal APRS. ?Then just change from 144.39 (APRS) to 145.825 and you should
> see everything from the ISS. ?No need for anything other than the rubber
> duck antenna.
>
> You can confirm the ISS is in APRS mode by checking the age of packets on
> this site:
> www.ariss.net. ?As of right now, it appears the packets are less than an
> hour old, so clearly the ISS APRS downlink is on and working.
>
> You can try to send a few packets, but with the rubber-duck you won't make
> it in. ?With a full sized 19" whip you can make it (but only if you have the
> uplink all to yourself). ?Of course, the arrow antenna should do it fine.
> But there are two other approaches.
>
> 1) A simple dipole held horizontal 18" above a ground plane of some kind.
> Chicken wire, rabbit fencing, should be about 4' square or so. ?This should
> give you about 5 dBi gain. Then you should be able to get in during the
> center 2 minutes of the overhead pass each day.
>
> 2) Use the same ground plane above, and install a 58" vertical whip antenna
> on it. ?That antenna will give almost 7 dBi gain when the ISS is above 30
> degrees (center 2 minutes of an overhead pass).
>
> When you TX and see the radio flash "MY POSITION", then you know you got in
> and everyone else saw you too. ?Or send an email to yourself using the APRS
> message feature.
>
> Good luck!
> Bob, WB4aPR
>
>
>
Bob, Everyone:
Thanks for the advice. I think I am going to try exactly what you
describe with respect to receiving APRS packets from the ISS. Then if
that goes well I will most likely get a portable Arrow.
I do use for HF a Buddipole - I am pretty sure I could make a vertical
with enough gain to accomplish bullet item #2 above. However, its
less maneuverable for manually tracking a satellite.
73
-aps
------------------------------
Message: 9
Date: Thu, 5 May 2011 06:44:40 -0700
From: Randy Hall <listk7age@xxxxx.xxx>
Subject: [amsat-bb] Re: Portable satellite antenna
To: Alexander Sack <pisymbol@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <BANLkTinVyM=fui16wu2dsq8Y=KLdAjn=fQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi
Here is a video of me using my Arrow with AO-51.
http://www.youtube.com/watch?v=1HfvmU_utI8
Randy
K7AGE
On Wed, May 4, 2011 at 7:27 PM, Alexander Sack <pisymbol@xxxxx.xxx> wrote:
> AMSAT-BB:
>
> I am a relatively new ham (1.5 months) and I have caught the satellite
> bug. I own a Kenwood TH-D72A which from reading this list and some
> others is a great little HT to operate satellites.
>
> The issue is an antenna. I live in an antenna restricted area so I am
> not sure what to do.
>
> I have read about the Arrow Antenna:
>
> http://www.arrowantennas.com/arrowii/146-437.html
>
> My goal is to work minimally the ISS! :-)
>
> Can folks suggest a portable setup that could work with my HT? Or are
> my expectations too high?
>
> 73
>
> -aps (KC2ZSX)
> _______________________________________________
> 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: Thu, 05 May 2011 20:42:38 +0200
From: "Johann Lochner" <lochner@xxx.xx.xx>
Subject: [amsat-bb] Re: SO-67 Question
To: amsat-bb@xxxxx.xxx
Message-ID: <4DC30BBE.32172.963A502@xxxxxxx.xxx.xx.xx>
Content-Type: text/plain; charset=US-ASCII
Hi Dave,
On Tuesday, 2011-05-03 21:56 +0200, Dave Marthouse wrote:
> When SO-67 isn't operating in amateur mode is it on a different
> frequency. If so, what frequency is it and what modulation scheme
> is used?
Telemetry downloads, activity uploads and housekeeping tasks are
performed on commercial VHF and UHF frequencies, using 9600 bps
G3RUH compatible modems.
Image data is downlinked over South Africa on S-band, using 72 Mbps
QPSK modulation.
73 de ZR1CBC, Johann.
------------------------------
Message: 11
Date: Thu, 5 May 2011 20:50:39 +0200
From: "Jan H. van Gils" <janvg@xxxxx.xx>
Subject: [amsat-bb] Re: 6th Aniversary of HAMSAT- VO 52
To: "Mani VU2WMY" <wmy@xxxx.xxx.xx>
Cc: "BB, AMSAT" <amsat-bb@xxxxx.xxx>, AMSAT-INDIA
<amsatindia@xxxxxxxxxxx.xxx>, VUHAMS <vuhams@xxxxxxxxxxx.xxx>, "HAMS,
ISRO" <isrohams@xxxxxxxxxxx.xxx>
Message-ID: <20110505185039.6838323002@xx.xxxxx.xx>
Content-Type: text/plain;charset=iso-8859-1
On Thu, May 5, 2011 03:22, Mani VU2WMY wrote:
Hi Mani,
VO-52 is really a great Sat and it works great. Congratulations with this
anniversary.
PE0SAT
> Dear Friends,
> It gives us great pleasure and satisfaction to say that 'HAMSAT-VO 52'
> has completed 6 years of successful operation in orbit. HAMSAT was
> launched on 5th May 2005 aboard PSLV-C6 from Sriharikotta.
>
> The transponder and the beacon on-board were never been off the air,
> even for a second from the time they were switched 'ON'. Looking at
> the health parameters, HAMSAT is still in good condition and we are
> sure it would provide fruitful services for many more years to come.
>
> On this happy occasion,we express our sincere thanks to the entire
> ISRO HAMSAT project team for this great feat. Our thanks to
> AMSAT-India, Kumar VU2BGS and Willaims PEIRAH for their contributions.
>
> 73 de
>
> Mani, VU2WMY
> Secretary & Station-In-Charge
> Upagrah Amateur Radio Club VU2URC
> ISRO Satellite Centre
> HAL Airport Road, Bangalore-560 017.
> Phone:(O)91-80-25082054/2598/2192
> Mobile: 91-80-98803 41456
> E-mail ID: wmy@xxxx.xxx.xx
> vu2wmy_mani@xxxxx.xxx
> isrohams@xxxxx.xxx
>
>
>
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> _______________________________________________
> 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
>
--
With regards Jan H. van Gils
Internet web-page http://www.VGNet.NL/
Internet e-mail address JanVG[at]VGNet.NL
Niet Zwammen maar doen ......
------------------------------
_______________________________________________
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 6, Issue 260
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