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CX2SA > SATDIG 14.08.11 21:04l 572 Lines 19281 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. ARISSat-1 Chicken Little Contest Announced! (Alan P. Biddle)
2. Re: [YCCC] Netbooks (Fred Hopengarten)
3. Re: Decoding wideband recordings (Bruce Robertson)
4. Secret Word question (James Luhn)
5. ARISSat=1 Report)s) (Stuart Balanger)
6. Re: Decoding wideband recordings (Al Bolduc)
7. Re: Secret Word question (Mike Schaffer)
8. Arissat-1 (PY5LF)
9. Re: Secret Word question (Alan P. Biddle)
10. Thinking about ARISSat-2 (Burns Fisher)
11. 436CP42UG polarity switch update manual of M2 ???
(Juan Antonio Fernandez)
----------------------------------------------------------------------
Message: 1
Date: Sun, 14 Aug 2011 09:40:02 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>, "SAREX-BB" <SAREX@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1 Chicken Little Contest Announced!
Message-ID: <9AE9DEEAA5AC4CA6B672587D1C4C6918@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
All,
By popular demand we are going to be running a Chicken Little Contest for
ARISSat-1. Using the method of your choice, give us your best guesstimate
of when it will finally reenter. One submission per person, class, or club,
please.
Alan
WA4SCA
====================
AMSAT is happy to announce the ARISSat-1 Chicken Little Contest.
This is your opportunity to calculate, or guess, when ARISSat-1
falls out of orbit. This is defined as the time it crosses an
altitude of 78 kilometers, which is considered to be the point of
no return. While not part of the contest, the actual reentry may
be visible depending on location. Reports are encouraged.
As in the past, we will have three divisions:
+ Student category for Kindergarten through grade 8
+ Student category for High School, grades 9 through 12
+ All others will be in the adult category.
In addition to individual students, we encourage classes or organ-
izations such as science clubs to make group submissions. Submissions
are limited to one per person or group. Members of a group making a
submission may not submit a second, individual entry.
+ Adults and individual students should include their name and amateur
callsign if they have one.
+ Individual students should also give their grade in school.
+ Student groups should include the name of their group or class,
school, and which category they represent.
+ Please give the UTC date in the format of day, month, year, hours,
minutes, and seconds.
+ Finally, we would like to know your city, state, province or
region, and your country.
+ Submissions will close on 15 September 2011 at 23:59:00 UTC.
The closest predictions in each category will be recognized for their
achievement. Send your submissions to CHICKENLITTLE@xxxxxxxx.xxx.
Good luck!
[ANS thanks ARISSat-1/KEDR team for the above information]
------------------------------
Message: 2
Date: Sun, 14 Aug 2011 10:12:02 -0400
From: "Fred Hopengarten" <hopengarten@xxxx.xxxxxxx.xxx>
To: "'Alex Malyava'" <alex.k2bb@xxxxx.xxx>, <tjjapha@xxxxxxxxx.xxx>
Cc: 'yccc' <yccc@xxxx.xxx>, 'amsat-bb' <amsat-bb@xxxxx.xxx>, 'obo'
<obo@xxxxx.xxx>
Subject: [amsat-bb] Re: [YCCC] Netbooks
Message-ID: <005401cc5a8c$30847490$918d5db0$@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Alex:
Benefits of a netbook (I have the smaller of the two Acer sizes, only
something like 8.9 inches for the screen):
Size: Yes
Weight: Yes. My Acer Aspire One weights almost exactly 1.0 kg. (2.2 lbs.)
Acer sells one size larger screen (10+ inches), but it weights more.
Battery life: Sucks. I get 2.25 hours. You can squeeze out another 45
minutes by turning off wi-fi, turning off sound, etc. You can get a bigger
battery, or a replacement 2d battery (to swap in), but this adds weight.
Keyboard: 85% the size of normal, but I find it tolerable -- even for legal
writing. Not great, but tolerable.
Ham radio: I brought my tiny Acer Aspire One to Bulgaria for the LZ HF Open.
It did everything I asked of it. It sent CW, controlled the IC-7000, ran
N1MM. There was no internet, but on another occasion, if I needed it, I
could also run internet spotting for point and shoot. (But remember, you run
out of screen real estate faster on a small screen.)
Business: Smaller means easier to bring along with a projector to show
zoning people why they are wrong about their ideas on restricting antennas.
When travelling, I like the tiny Acer because it fits into a European
man-bag and weighs only 1 kg. No need for a "computer bag." This means I
can check e-mail whenever I find myself in a wi-fi hotspot. Some of the
hotels/inns don't have wi-fi, and I'll never remember to come back and find
that coffee shop with wi-fi.
Downside: CPU slower, less memory. Result: Working on a 25 MB document (a
filing with photos) is occasionally irritating because it is slower than my
desktop. My tiny netbook uses the Atom processor, which is just barely
enough.
Conclusion: MicroCenter sells Acer Aspire One netbooks about twice a year
for $199. If you break one on the road (or lose one, but thank goodness
neither has happened to me yet), you don't feel so bad. I think of mine as a
really nice toy that I thoroughly enjoy. And I really like travelling with
Skype. But I doubt I'd recommend a netbook for processor-intensive
engineering, or extensive use of Google Earth.
Bottom line to question asked: I've used my netbook with an IC-7000 and it
ran 100%.
Fred Hopengarten, Esq. K1VR -- hopengarten@xxxx.xxxxxxx.xxx
Six Willarch Road
Lincoln, MA 01773
www.antennazoning.com
-----Original Message-----
From: yccc-bounces@xxxxxxxxxx.xxx [mailto:yccc-bounces@xxxxxxxxxx.xxxx On
Behalf Of Alex Malyava
Sent: Saturday, August 13, 2011 5:10 PM
To: tjjapha@xxxxxxxxx.xxx
Cc: yccc; amsat-bb; obo
Subject: Re: [YCCC] Netbooks
What's the benefit of net-books?
Size, weight, battery life?
they are cheaper, but not that much - cheapest 15" notebooks are $280...320.
CPU and memory are also not as good as in notebooks.
Where you gonna use it?
If someone tested net-book+radio configuration and it runs no problem 100% -
I can be convinced that there is no reason to pay more for notebook and
carry more weight to some DX country.
AM
On Sat, Aug 13, 2011 at 9:05 AM, ANTHONY JAPHA <tjjapha@xxxxxxxxx.xxx>wrote:
> All,
> Mni tnx for the responses about netbooks. Generally, a lot of
satisfaction
> with them, with concerns abt. speed and keyboard size. In my application,
> neither should be a problem. ASUS was highly recommended.
> 73,
> Tony, N2UN
> _______________________________________________
> YCCC Reflector mailto:yccc@xxxxxxxxxx.xxx
> Yankee Clipper Contest Club http://www.yccc.org
> Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
>
>
_______________________________________________
YCCC Reflector mailto:yccc@xxxxxxxxxx.xxx
Yankee Clipper Contest Club http://www.yccc.org
Reflector Info: http://lists.contesting.com/mailman/listinfo/yccc
------------------------------
Message: 3
Date: Sun, 14 Aug 2011 13:06:08 -0300
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
To: Phil Karn <karn@xxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID:
<CA++UmbmbX=_rEG5sCt3=H1yx+KLMpaHUP8_-B5U5E8PZxG+sow@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Sat, Aug 13, 2011 at 7:07 PM, Phil Karn <karn@xxxxxxxx.xxx> wrote:
> On 8/10/11 8:24 PM, Tom Azlin N4ZPT wrote:
>> I have a Fun Cube Dongle so I would Phil. Thanks and 73, Tom n4zpt
>
> Okay, everybody make and keep your wideband I/Q recordings and I'll work
> on an enhancement to my demodulation/decoding software to process them.
> It may not run in real time on slower machines because of the need to
> search a wider frequency range, but this won't matter if it can work on
> a recording.
>
> I can probably speed things up by including an orbit model in the modem
> to predict Doppler open-loop, but this will take time to implement and
> it will still be vulnerable to small errors in the elements and/or your
> clock, especially around closest approach. So record the date and time
> of your recordings and the current eleset at that time.
For those who have not noted this feature, HDSDR will open a recording
scheduler if you right click on the 'record' button. It saves files
with UTC time appended. The tricky part is that you have to set the
scheduler manually in local time.
I've been thinking it would be a nifty hack to make a FCD recorder for
a set of satellites using a very small computer, like the BeagleBoard.
It seems to me that a daily cron job with 'Predict' would just about
do what was necessary, especially now that we have a commandline tool
for the FCD. The only part that would take some fiddling would be
piping the USB sound card into a file with the proper headers for
HDSDR.
73, Bruce VE9QRP
--
http://ve9qrp.blogspot.com
------------------------------
Message: 4
Date: Sun, 14 Aug 2011 11:41:08 -0500
From: James Luhn <luhn@xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Secret Word question
Message-ID: <4E47FAA4.2010605@xx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I sent in a report to secretword@xxxxxxxx.xxx but I have not received
a reply. I am just wondering if this is an auto reply response or does
a real human look at the data? No big deal as the fun of hearing
ARISSAT-1 far exceeds the desire for any kind of pdf certificate. I
attached a recording that I made and perhaps this upset something. I am
becoming quite attached to this satellite and do not miss any
opportunity to receive a radio transmission.
73,
James
W5AOO.
------------------------------
Message: 5
Date: Sun, 14 Aug 2011 13:09:53 -0400
From: Stuart Balanger <wa2bss@xxxxx.xxx>
To: AMSAT-BB@xxxxx.xxxx tlmreport@xxxxxxxx.xxx
Subject: [amsat-bb] ARISSat=1 Report)s)
Message-ID:
<CAOSqB0gRmptDvtObht-4OXV9Jx7LKgK6jMN40pS_KN4waYVYGA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
*I would like to send 2 telemetry (reception)ARISSat-1
reports:
1) Stuat Ballinger (WA2BSS); August 8/1008(UTC Signal Strength S1 to S3
Clearly heard the ID, but couldn't make out the telemetry stats;
Poughkeepsie,NY
USA; WA2BSS@xxxxx.xxx
Tranciver used: Kenwood TM-255A & Ringo Ranger.
2) Stuart Ballinger (WA2BSS);August 13/0104 UTC Signal strngth S1
No ID, but heard voices, & no telemetry. the noise flor ws nil
for only abr 1/2 min. Poughkeepsie,NY USA;WA2BSS@xxxxx.xxx
Tranceiver used: Kenwood TS-2000 & Ringo Ranger!
Thanks,. & 73,.Stu
*
------------------------------
Message: 6
Date: Sun, 14 Aug 2011 13:07:32 -0400 (EDT)
From: Al Bolduc <a.bolduc@xxxxxxx.xxx>
To: Bruce Robertson <ve9qrp@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Decoding wideband recordings
Message-ID: <alpine.LNX.2.00.1108141306190.3423@xxxx.xxxxx>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Try the following
#!/bin/bash
#
# Record sdr data from FunCube Dongle.
#
# Usage: fcd_record extra_options filename
# example: fcd_record --duration=60 tt.wav
#
DEV="--device=hw:3"
OPTIONS="--format=S16_LE --channels=2 --rate=96000"
arecord $DEV $OPTIONS $@
On Sun, 14 Aug 2011, Bruce Robertson wrote:
> On Sat, Aug 13, 2011 at 7:07 PM, Phil Karn <karn@xxxxxxxx.xxx> wrote:
>> On 8/10/11 8:24 PM, Tom Azlin N4ZPT wrote:
>>> I have a Fun Cube Dongle so I would Phil. Thanks and 73, Tom n4zpt
>>
>> Okay, everybody make and keep your wideband I/Q recordings and I'll work
>> on an enhancement to my demodulation/decoding software to process them.
>> It may not run in real time on slower machines because of the need to
>> search a wider frequency range, but this won't matter if it can work on
>> a recording.
>>
>> I can probably speed things up by including an orbit model in the modem
>> to predict Doppler open-loop, but this will take time to implement and
>> it will still be vulnerable to small errors in the elements and/or your
>> clock, especially around closest approach. So record the date and time
>> of your recordings and the current eleset at that time.
>
>
> For those who have not noted this feature, HDSDR will open a recording
> scheduler if you right click on the 'record' button. It saves files
> with UTC time appended. The tricky part is that you have to set the
> scheduler manually in local time.
>
> I've been thinking it would be a nifty hack to make a FCD recorder for
> a set of satellites using a very small computer, like the BeagleBoard.
> It seems to me that a daily cron job with 'Predict' would just about
> do what was necessary, especially now that we have a commandline tool
> for the FCD. The only part that would take some fiddling would be
> piping the USB sound card into a file with the proper headers for
> HDSDR.
>
> 73, Bruce VE9QRP
>
>
> --
> http://ve9qrp.blogspot.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
>
Al
--
# Al Bolduc - a.bolduc@xxxxxxx.xxx - ka1as@xxxxx.xxx
------------------------------
Message: 7
Date: Sun, 14 Aug 2011 10:32:48 -0700 (PDT)
From: Mike Schaffer <daetsort@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Secret Word question
Message-ID:
<1313343168.11149.YahooMailNeo@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
James:
?
ARISSat1.org are getting hundreds of reception reports flooding into the
organization.?
?
I?reported my secret word to them four days ago with?no pdf certificate
received to date.
?
With the Aug 11 delay in high power mode while entering sunlight and then
the Aug 12 battery failing has caused a shift in priorities, less time
devoted to generating pdf certificates is my guess.
?
We all need to be extra patient on this one.
73's
?
Mike Schaffer
KA3JAW
EL87
Tampa, Florida
------------------------------
Message: 8
Date: Sun, 14 Aug 2011 14:38:58 -0300
From: "PY5LF" <py5lf@xxxxxxxxxxxxx.xxx.xx>
To: <AMSAT-BB@xxxxx.xxx>
Subject: [amsat-bb] Arissat-1
Message-ID: <000001cc5aa9$0c202d70$24608850$@xxx.xx>
Content-Type: text/plain; charset="us-ascii"
Hi
Voice telemetry , 145950.0 , 17:30 UTC , Transponder ON:
MET - 40min
IHU Temp - 42C
Control Panel Temp - 56C
Battery Voltage - 36.6V
Battery Current -4mA
73
PY5LF
LUCIANO FABRICIO
Curitiba-PR-Brazil GG54jm
<http://www.qrz.com/db/py5lf> http://www.qrz.com/db/py5lf
------------------------------
Message: 9
Date: Sun, 14 Aug 2011 13:09:44 -0500
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: "'James Luhn'" <luhn@xx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Secret Word question
Message-ID: <846D30D9E0094D3097F49793FB34EB70@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
James,
This is handled by a small team of real humans, or at least real hams.
Emphasis on the word "small." The confirmation process is active, but it
will take a little time to get things up to full speed.
73s,
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of James Luhn
Sent: Sunday, August 14, 2011 11:41 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Secret Word question
I sent in a report to secretword@xxxxxxxx.xxx but I have not received
a reply. I am just wondering if this is an auto reply response or does
a real human look at the data? No big deal as the fun of hearing
ARISSAT-1 far exceeds the desire for any kind of pdf certificate. I
attached a recording that I made and perhaps this upset something. I am
becoming quite attached to this satellite and do not miss any
opportunity to receive a radio transmission.
73,
James
W5AOO.
_______________________________________________
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: Sun, 14 Aug 2011 14:31:47 -0400
From: Burns Fisher <burns@xxxxxx.xx>
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Thinking about ARISSat-2
Message-ID:
<CABX7KxUZFwxgSZCX7PL74W=bsqD1TcHx720di+ijWYujLeMWXA@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I know the ARISSat team is busy with bird #1, but I'm just thinking about
lessons we might learn for version 2. I think it is great that we are
getting so much data about the battery. Assuming that there might be
another satellite launched from the ISS, we will still have the same
man-rating issues, and thus the battery might need to be the same Russian
space suit battery. If that were true, what might we take away from #1 to
help with #2? It was hoped that many shallow charge cycles might keep the
battery running longer than the few deeps cycles that it is spec'ed for.
Sounds like we got maybe 10 days out of it before it started to
deteriorate.
What about another strategy? Suppose we did exactly what the battery was
spec'ed for: Deep cycles. Let's say 333ma current draw and let's say that
the battery is rated at 24Ah. So what if we only charged the battery every
3 days; maybe even turn off the transmitter while it charges. 5 cycles is
15 days. A bit better than this time. Maybe (also) we extend that 3 days
between charges by only using the batteries in eclipse.
This obviously requires additional electronics; in particular the battery
can't be on the main power bus; we want to be able to isolate it to prevent
it charging on every orbit. But that might be good anyway...the ability to
isolate the battery might be desirable when the battery does die for good.
Just thinking...
Burns, W2BFJ
------------------------------
Message: 11
Date: Sun, 14 Aug 2011 20:35:56 +0200
From: Juan Antonio Fernandez <ea4cyq@xxxxx.xxx>
To: amsat-bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] 436CP42UG polarity switch update manual of M2 ???
Message-ID:
<CA+5nehNTneniu1BaACLzEeCaAm=dMudvV0Bffipra6niLVbO0Q@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
In order to update the 436CP42UG M2 antenna with the 436 Polarity
Switch, I can read in the 436 Polarity switch update Manual of
11-29-00 in the point 10. ?Re-install the shorting bars on the rear
driven element. Set de bars at the dimension shown on the ?Antena
dimensions? sheet. Note: On the 436CP42UG, the rear shorting bars are
at a different dimension than the front driven element shorting bars?.
In the 436CP42 U/G Assembly Manual Rev. 5-20-96 of 10-6-95, in the
antenna dimensions sheet, I can read only one dimension for the
shorting bars of both driven elements ?4,375??.
Can somebody help me?
Please answers in ?bb or at ea4cyq@xxxxx.xxx
------------------------------
_______________________________________________
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 464
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