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CX2SA > SATDIG 20.10.15 22:43l 945 Lines 30772 Bytes #999 (0) @ WW
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Sent: 151020/2031Z @:CX2SA.SAL.URY.SOAM #:29853 [Salto] FBB7.00e $:AMSATBB10316
From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. TM transmitter is ON and satellite pass (shakeel -ur-rehman)
2. Shadowed-Rician fading in satellites (shakeel -ur-rehman)
3. Re: PSK31 Satellite Transponder works! (Ted)
4. DX Coffee Blog Covers the ISS HamTV project (JoAnne Maenpaa)
5. Re: PSK31 Satellite Transponder works! (KO6TZ Bob)
6. Re: A tip for Gqrx users and report of the copy of
FIREBIRD-II FU3/4 19k2 FSK. (M.Sc. Pavel Milanes Costa)
7. WD9EWK @ EN83, now (Patrick STODDARD (WD9EWK/VA7EWK))
8. Re: Bob Farquhar SK (James R. La Frieda)
9. Re: Bob Farquhar SK (SP3QFE)
10. VA7EWK/3 @ EN93/EN94 today (Patrick STODDARD (WD9EWK/VA7EWK))
11. Re: PSK31 Satellite Transponder works! (Robert Bruninga)
12. FO-29 and AO-73 Antenna Patterns and Crosslinks (Zach Leffke)
13. Re: [Forum] Bob Farquhar SK (Peter Guelzow)
14. Upcoming ARISS contact with Saku Children?s Science Dome for
the Future, Saku City, Japan (n4csitwo@xxxxxxxxx.xxxx
----------------------------------------------------------------------
Message: 1
Date: Mon, 19 Oct 2015 14:37:01 -0700
From: shakeel -ur-rehman <shakeelj2k@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] TM transmitter is ON and satellite pass
Message-ID:
<1445290621.14744.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
I come to know that funcube TM transmitter is ON during DAY and during NIGHT
Transponder in ON during night. I received the satellite BEACON and funcube
dashboard was set to capture from sound card dash was showing detected
frequency but no telemtry data has been received. the pass was taken at
with follwoing date and time
FUNcube-1 pass date 15 Oct pass time: 03:53:39 GMT time on 15th Oct
please suggest what will be the problem either my dash board software is
cause this error and or the TM transmitter in funcube-1 satellite is off.
previously i have taken many successfull passes of funcube satellite.
regards
------------------------------
Message: 2
Date: Mon, 19 Oct 2015 15:15:45 -0700
From: shakeel -ur-rehman <shakeelj2k@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Shadowed-Rician fading in satellites
Message-ID:
<1445292945.4629.YahooMailBasic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Hi ALL
Is anyone working in performance analysis of satellite link considering
Shadowed rician distribution in land mobile satellite channesl and many
research papers has been published.
Anyone who is doing many practical experiments with satellites like
listening to amature satellite pass ,downloading telelmetry ...etc
and may some one who is evaluating the performance of satellites using
theory/publications in ieee/iet .
------------------------------
Message: 3
Date: Mon, 19 Oct 2015 16:13:16 -0700
From: "Ted" <k7trkradio@xxxxxxx.xxx>
To: "'KO6TZ Bob'" <my.callsign@xxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
Message-ID: <002a01d10ac3$bccfcad0$366f6070$@xxxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
When launched, the recommended TX power was no more than 25W. Has that
changed?
73, Ted
K7TRK
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of KO6TZ Bob
Sent: Friday, October 16, 2015 12:04 PM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
Bob,
I was just on the 1820u 16Oct15 pass. 10m was high in noise, so the down
link was hard copy of my own signal. I only saw one other Doppler corrected
station (vertical PSK signal) just before LOS. Could not display the call
sign.
A couple of hints to successful contacts:
1. Do not correct for Doppler by shifting the frequency on your 10m radio.
2. Use the Doppler PSK program, allow it to correct for Doppler by shifting
the PSK-31 frequency.
3. Update the TLE's in the Doppler PSK program (copy / paste) 4. Once you
are able to see your signal on the down link, NEVER stop sending until the
end of the pass.
"Homestead" that frequency. Just switch from CQ to the QSO sequences
for a contact.
5. Look for other stations somewhere in the VF pass band.
6. This procedure is different than working PSK-31 on HF. So is the power
level.
BOB KO6TZ
> ON4HTI... will be participating in the... SCR, > and we always do a lot
of PSK... on 10-15-20m
Don't forget to listen to the PSK31 downlink on PSAT (NO84). Its FM
downlink is the audio copy of everything the satellite hears on the normal
28.120 MHz ten meter PSK31 terrestrial hangout.
And of course since the downlink (FM) adds no doppler, most signals come in
just fine and can be decoded by any PSK31 clients.
AND of course, being full duplex, it is fun to be transmitting to EVERYONE
in the passband at the same time you are seeing EVERYTHING everyone is
saying.
Try it...
http://aprs.org/psat.html
Bob, WB4aPR
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to all
interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 4
Date: Mon, 19 Oct 2015 18:56:57 -0500
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] DX Coffee Blog Covers the ISS HamTV project
Message-ID: <001b01d10ac9$d7225230$8566f690$@xxx>
Content-Type: text/plain; charset="us-ascii"
The ISS HamTV project with a downlink at 2.422 GHz and 2.437 GHz is
discussed on the DX Coffee blog at:
http://www.dxcoffee.com/eng/2015/10/19/the-ham-tv-project-a-technological-su
ccess-of-amsat-italia/
The TV format is DVB-S (Digital Video Broadcasting-Satellite)
--
73 de JoAnne K9JKM
k9jkm@xxxxx.xxx
------------------------------
Message: 5
Date: Mon, 19 Oct 2015 17:08:49 -0700
From: KO6TZ Bob <my.callsign@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
Message-ID: <56258611.6090106@xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Ted,
I am using a 1/2wave vertical (10m Ringo) for an antenna. I have never
been able to keep the down link transmitter turned on with less than
40w. Frequently it takes as much as 80w to keep the TX on. This may
have as much to do with the radiation angle from my antenna as the power.
When 10m is open, the terrestrial "PY" and "LU" stations, who are
clearly out of the footprint of NO84, turn on the FM-TX. They are
probably using less than 30w.
So to answer the question, depends on your antenna. Use what it takes,
but no more than needed.
KO6TZ Bob
When launched, the recommended TX power was no more than 25W. Has that
changed?
73, Ted
K7TRK
------------------------------
Message: 6
Date: Mon, 19 Oct 2015 20:15:19 -0400
From: "M.Sc. Pavel Milanes Costa" <co7wt@xxxxxx.xx.xx>
To: John Grant <jgrant@xxxxxx.xxxx.xxx>, "AMSAT-BB@xxxxx.xxxx
<amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] A tip for Gqrx users and report of the copy of
FIREBIRD-II FU3/4 19k2 FSK.
Message-ID: <56258797.5090401@xxxxxx.xx.xx>
Content-Type: text/plain; charset=windows-1252; format=flowed
This is the bookmark file I have talked about. [attached four you use,
feel free to use it...]
I have made a request to Alexandru Csete the author of Gqrx and it has
modified the source code of gqrx on github, now gqrx support up to 10
visual levels before fold and rewrite... it's only in the source yet, so
wait for it on the official PPA soon, if you know how to compile from
the source give it a try, it's working great here...
Thanks to Alex Csete for Gqrx...
73
El 19/10/15 a las 10:47, John Grant escribi?:
> Hi Pavel,
>
> I wonder if you could send through the bookmarks file for me to have a
> try with, I'm just about to put up a rhcp 70cm antenna and use gqrx
> frequently so this would be a good test.
>
> Thanks,
>
> John
> GI7UGV
>
> On 15/10/2015 04:24, M.Sc. Pavel Milanes Costa wrote:
>> I'm playing this night with my linux box and rtl-dsr + Gqrx +
>> Gpredict to see the 70cm satellite sub-band...
>>
>> And found a way to identify the sat from the spectrum at a glance in
>> 70cm using the bookmarks of gqrx... very handy feature of this
>> software... just linux here, not know if windows sdr soft has this
>> feature...
>>
>> After playing with satlist.csv (from
>> http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm) and parsing it
>> to make it work with gqrx... I fire the Gqrx software, put up the
>> antenna and watch for any suspicious signal... and the bookmarks on
>> top of the signals are there, nice....
>>
>> ... (a few minutes after) ... haja !!!!
>>
>> A packet like signal around 437.4 Mhz, zoom it.... wow, to wide for
>> normal packet... let's widen the filter to fit... ~25 Khz is enough,
>> hum... it's bigger than 9600 bauds... lets see what the bookmarks on
>> the screenm says... FIREBIRD-II FU4 19k2 FSK within the +/- 10khz of
>> doppler... bingo !!!
>>
>> Let's run Gpredict to check.... right on the spot... and also
>> FIREBIRD-II FU3 incoming on range... let's check... right...
>>
>> So if you use linux and some SDR hardware with Gqrx, you can use the
>> bookmark function to this purpose, you can actually click & zoom and
>> then read of the screen to approximate which is the satellite who tx
>> that signal... all at a glance...
>>
>> If any of you want to play with this I can send you my bookmark file
>> of the entire 70cm satellite sub-band, updated with the last info
>> from http://www.ne.jp/asahi/hamradio/je9pel/satslist.htm just email
>> me a private msg.
>>
>> I was not trying to decode, just to prove the usefulness of this
>> feature, I use the latest gqrx & gpredict from ubuntu PPA.
>>
>> BTW, none of the FIREBIRD satellites are in the
>> http://www.amsat.org/status/ page, so I can't update it's state.
>>
>> 73 from Cuba, CO7WT
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
>> to all interested persons worldwide without requiring membership.
>> Opinions expressed
>> are solely those of the author, and do not reflect the official views
>> of AMSAT-NA.
>> Not an AMSAT-NA member? Join now to support the amateur satellite
>> program!
>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>>
>
>
------------------------------
Message: 7
Date: Tue, 20 Oct 2015 01:43:39 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] WD9EWK @ EN83, now
Message-ID:
<CAN6TEUd7AHybp_TL-tMO6oXXebz_K1y292GBp7FW5WnOX7auHQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi!
Late notice, but I will be on the upcoming AO73 & SO50 passes
from EN83sa in a few minutes. Just got all set here.
73!
Patrick WD9EWK/VA7EWK
Port Huron MI
------------------------------
Message: 8
Date: Mon, 19 Oct 2015 20:57:30 -0700
From: "James R. La Frieda" <lafrieda@xxxxxxxxx.xxx>
To: Peter Guelzow <peter.guelzow@xxxxxx.xx>, forum@xxxxxxxx.xxxx
amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] Bob Farquhar SK
Message-ID: <5625BBAA.8070100@xxxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
https://en.wikipedia.org/wiki/Robert_W._Farquhar
https://en.wikipedia.org/wiki/Halo_orbit
On 10/19/2015 1:58 PM, Peter Guelzow wrote:
> Robert W. Farquhar, PhD (1932-2015)
>
> It is with great sadness to inform you that Robert W. Farquhar, former
> flight director of the ISEE-3 mission passed away on Sept 18th, 2015.
>
> Bob?s dissertation was key to halo orbits around libration points, which
> are now used by many science missions. After redirecting the ISEE-3
> mission to comet Giacobini-Ziner in 1985 he developed the trajectory
> with eventually returned ISEE-3 to earth?s vicinity in 2014, where with
> his assistance an international team successfully regained control of
> the aging spacecraft.
>
> Our heart goes out to his family and friends and all those who were
> close to him.
>
> Peter Guelzow, DB2OS
> AMSAT-DL
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 9
Date: Tue, 20 Oct 2015 06:28:08 +0200
From: SP3QFE <kontakt@xxxxxx.xxx>
To: "James R. La Frieda" <lafrieda@xxxxxxxxx.xxx>, forum@xxxxxxxx.xxxx
amsat-bb@xxxxx.xxxx Peter Guelzow <peter.guelzow@xxxxxx.xx>
Subject: Re: [amsat-bb] Bob Farquhar SK
Message-ID: <lxvl1hjua24n41thvphvno1o.1445315288561@xxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Thank you for info. It happen on 18 Sep or 18 Oct.?
73, Armand SP3QFE.
Wys?ano z mobilnego terminala pocztowego.
Sent from the mobile e-mail terminal.
20 pa? 2015 05:57 "James R. La Frieda" <lafrieda@xxxxxxxxx.xxx> napisa?(a):
>
> https://en.wikipedia.org/wiki/Robert_W._Farquhar
>
> https://en.wikipedia.org/wiki/Halo_orbit
>
> On 10/19/2015 1:58 PM, Peter Guelzow wrote:
> > Robert W. Farquhar, PhD (1932-2015)
> >
> > It is with great sadness to inform you that Robert W. Farquhar, former
> > flight director of the ISEE-3 mission passed away on Sept 18th, 2015.
> >
> > Bob?s dissertation was key to halo orbits around libration points, which
> > are now used by many science missions. After redirecting the ISEE-3
> > mission to comet Giacobini-Ziner in 1985 he developed the trajectory
> > with eventually returned ISEE-3 to earth?s vicinity in 2014, where with
> > his assistance an international team successfully regained control of
> > the aging spacecraft.
> >
> > Our heart goes out to his family and friends and all those who were
> > close to him.
> >
> > Peter Guelzow, DB2OS
> > AMSAT-DL
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> > to all interested persons worldwide without requiring membership.
Opinions expressed
> > are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> > Not an AMSAT-NA member? Join now to support the amateur satellite program!
> > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
expressed
> are solely those of the author, and do not reflect the official views of
AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 10
Date: Tue, 20 Oct 2015 15:34:52 +0000
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] VA7EWK/3 @ EN93/EN94 today
Message-ID:
<CAN6TEUe4aChLGJNa9uAvNSqrMu7EkSKp0GRttLS9-9NVfY-7fg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi!
After an early start, and a slight delay at the border, I am now
about 20 miles or so north of Goderich, Ontario, and ready to
work various passes from the EN93dx/EN94da boundary
along Ontario route 21, just east of Lake Huron. I already
worked an SO-50 pass from here, and will work the next SO-50
pass followed by an FO-29 pass around 1700 UTC that may
cover out to England. I am operating as VA7EWK/3, and
this is how I will upload QSOs to Logbook of the World.
I think I have a receive issue in my IC-2820H mobile radio, so
I will work any further SO-50 passes with an HT or SDR
receiver for the downlink, through a duplexer to my Elk
log periodic. I have 3 HTs and two SDR receivers here, so
that should not be an issue.
I hear APRS out here, but I can't reach the digipeaters up
here. When I move away from here, maybe my track will
reappear there.
More information will be on my @xxxxxx Twitter feed,
viewable at https://twitter.com/WD9EWK for those not on
Twitter. Some rain off and on up here, and I saw snow about
halfway between Sarnia and this area. No snow is falling,
just the occasional rain. A nice day now, at 59F/15C outside.
73!
Patrick VA7EWK/WD9EWK - near Goderich, Ontario
http://www.wd9ewk.net/
Twitter: @xxxxxx
------------------------------
Message: 11
Date: Tue, 20 Oct 2015 11:43:50 -0400
From: Robert Bruninga <bruninga@xxxx.xxx>
To: Ted <k7trkradio@xxxxxxx.xxx>, KO6TZ Bob <my.callsign@xxxxxxx.xxx>,
amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
Message-ID: <9f441d75054e1f56eace2a5ec4ffc0eb@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
> When PSAT launched, the recommended PSK31 TX power was no more than 25W.
> Has that changed?
Yes, he web page now says 100 or what is needed to communicate...
Bob, WB4APR
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Ted
Sent: Monday, October 19, 2015 7:13 PM
To: 'KO6TZ Bob'; amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
When launched, the recommended TX power was no more than 25W. Has that
changed?
73, Ted
K7TRK
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of KO6TZ Bob
Sent: Friday, October 16, 2015 12:04 PM
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] PSK31 Satellite Transponder works!
Bob,
I was just on the 1820u 16Oct15 pass. 10m was high in noise, so the down
link was hard copy of my own signal. I only saw one other Doppler
corrected station (vertical PSK signal) just before LOS. Could not display
the call sign.
A couple of hints to successful contacts:
1. Do not correct for Doppler by shifting the frequency on your 10m radio.
2. Use the Doppler PSK program, allow it to correct for Doppler by
shifting the PSK-31 frequency.
3. Update the TLE's in the Doppler PSK program (copy / paste) 4. Once you
are able to see your signal on the down link, NEVER stop sending until the
end of the pass.
"Homestead" that frequency. Just switch from CQ to the QSO sequences
for a contact.
5. Look for other stations somewhere in the VF pass band.
6. This procedure is different than working PSK-31 on HF. So is the power
level.
BOB KO6TZ
> ON4HTI... will be participating in the... SCR, > and we always do a
lot of PSK... on 10-15-20m
Don't forget to listen to the PSK31 downlink on PSAT (NO84). Its FM
downlink is the audio copy of everything the satellite hears on the normal
28.120 MHz ten meter PSK31 terrestrial hangout.
And of course since the downlink (FM) adds no doppler, most signals come
in just fine and can be decoded by any PSK31 clients.
AND of course, being full duplex, it is fun to be transmitting to EVERYONE
in the passband at the same time you are seeing EVERYTHING everyone is
saying.
Try it...
http://aprs.org/psat.html
Bob, WB4aPR
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to
all interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. AMSAT-NA makes this open forum available to
all interested persons worldwide without requiring membership. Opinions
expressed are solely those of the author, and do not reflect the official
views of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 12
Date: Tue, 20 Oct 2015 11:58:24 -0400
From: Zach Leffke <zleffke@xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] FO-29 and AO-73 Antenna Patterns and Crosslinks
Message-ID: <562664A0.5010901@xx.xxx>
Content-Type: text/plain; charset=utf-8; format=flowed
Hello!,
First off, I'd like to say I had a blast at the 2015 AMSAT
Symposium. It was a lot of fun and I know that the rest of the VT team
really appreciated the warm welcome from everyone.
Drew and I got to talking at one point after the Banquet and he
re-kindled an interest in something for me. He posted a while back
about how the downlink for AO-73 is in the passband of FO-29's uplink,
and that the PSK can be heard at times when monitoring FO-29's
downlink. I'd like to do a bit more analysis using STK to predict when
an 'accidental crosslink' might occur allowing a telemetry decode of
AO-73 via FO-29.
Right now I'm using a simple model for all of this where I'm treating
each satellite as a single point in the sky. The first question I'm
asking (via STK simulation profiles) is when can the two "points in the
sky" see each other when not blocked by the curvature of the earth. The
next question I will ask of the great and glorious STK is when can the
two "points in the sky" see each other AND when can the point in the sky
that is FO-29 see the point on the ground that is the VT Ground Station.
When the second question yields accesses in time when the two spacecraft
can see each other and FO-29 can see the VTGS, then I have a window to
schedule the VTGS for this experiment.
The next trick will be accounting for doppler between the two spacecraft
(via range rate info from STK for the two points) to determine where
exactly in FO-29's uplink passband the AO-73 signal will fall. Then
account for the Linear inverting transponder offsets, then account for
doppler between FO-29 and VTGS. Also, the signal spectrum will be
inverted due to the transponder, but we can "re-invert" in our GNU-Radio
flowgraph to account for that.
End result should be an access window at VTGS along with a predicted
doppler curve for tuning at VTGS, ultimately getting us to an AO-73 tlm
decode via FO-29.
My question for the group concerns the antenna patterns for FO-29 and
AO-73. I'm trying to plan ahead for refining the access windows for
when to actually conduct this experiment by doing a bit more than treat
each satellite as a "point in the sky." Does anyone have any info on
the actual antenna pattern for FO-29? Along with this, I remember
reading somewhere that FO-29 has an attitude control system. Is this
system still operational and if so, what is the "target attitude." I'm
trying to get a sense of the antenna patterns for the two spacecraft and
their orientations to identify "sweet spots" where antenna patterns
might align positively. On the other hand it will be good to know when
we have an access window but one of the spacecraft is in the null of the
antenna pattern of the other spacecraft. For AO-73 I'm assuming simple
whip antennas. I know it doesn't have a positive attitude control
system, but if memory serves I think it has a bar magnet and the spin
from the anodized bars imparted on it that should give me a sense of its
orientation at particular times.
Thanks in advance!
-Zach, KJ4QLP
--
Research Associate
Ted & Karyn Hume Center for National Security & Technology
Virginia Polytechnic Institute & State University
Work Phone: 540-231-4174
Cell Phone: 540-808-6305
------------------------------
Message: 13
Date: Tue, 20 Oct 2015 21:08:02 +0200
From: Peter Guelzow <peter.guelzow@xxxxxx.xx>
To: AMSAT <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] [Forum] Bob Farquhar SK
Message-ID: <56269112.9080302@xxxxxx.xx>
Content-Type: text/plain; charset=utf-8
It was indeed on 18th of October, not August....
Am 19.10.2015 um 22:58 schrieb Peter Guelzow:
> Robert W. Farquhar, PhD (1932-2015)
>
> It is with great sadness to inform you that Robert W. Farquhar, former
> flight director of the ISEE-3 mission passed away on _October_ 18th, 2015.
>
> Bob?s dissertation was key to halo orbits around libration points, which
> are now used by many science missions. After redirecting the ISEE-3
> mission to comet Giacobini-Ziner in 1985 he developed the trajectory
> with eventually returned ISEE-3 to earth?s vicinity in 2014, where with
> his assistance an international team successfully regained control of
> the aging spacecraft.
>
> Our heart goes out to his family and friends and all those who were
> close to him.
>
> Peter Guelzow, DB2OS
> AMSAT-DL
------------------------------
Message: 14
Date: Tue, 20 Oct 2015 16:29:28 -0400
From: <n4csitwo@xxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Upcoming ARISS contact with Saku Children?s
Science Dome for the Future, Saku City, Japan
Message-ID: <8425617B4BFF430889DF462C405265E2@xxx>
Content-Type: text/plain; charset="utf-8"
An International Space Station school contact has been planned with
participants at Saku Children?s Science Dome for the Future, Saku City,
Japan on 22 Oct. The event is scheduled to begin at approximately 09:52 UTC.
It is recommended that you start listening approximately 10 minutes before
this time.The duration of the contact is approximately 9 minutes and 30
seconds. The contact will be direct between NA1SS and 8N0SDF. The contact
should be audible over Japan and adjacent areas. Interested parties are
invited to listen in on the 145.80 MHz downlink. The contact is expected to
be conducted in English.
??????????2001??????????????????????????????????????????????????170???????????
??????????????????????????????????????????????????????????????????????????????
????????????????????
The Saku Children?s Science Dome for the Future is a science museum that was
founded in 2001. It has a variety of exhibits on earth science, space,
biotechnology, the environment and more. Some of the attractions that gain
the attention of the children are a life-size model of a dinosaur, a 170
seat planetarium and a ?mercury? display model presented by NASA. The center
is located near the birth place of Mr. Kimiya Yui. Mr. Yui himself has
visited the center several times. The name of the center has the word
?children?s? in it, yet all ages can learn from the Saku Children?s Science
Dome for the Future.
Participants will ask as many of the following questions as time allows:
??? ????????????????????????????????????
???????????????????????????????????? ?????
?? ? ????????????????
?? ? ???????????????????????????????????? ?????
4.? ???????????????????????????????????? ?????????????????
?.? ????????????????????????????????????
???????????????????????????????????? ?
?.? ??????????????????????????????????
?.??? ????????????????????????????????????
???????????????????????
?.? ???????????????????????????????????? ???????????????
?.? ????????????????????????????????????
?????????????????????????????????
??.?? ???????????????????????????????????? ?????????
1. I was very impressed with your HTV capture. I want to be an?astronaut
like you. What made you the most nervous during the mission?
2. Could you describe the view from the ISS?
3. I heard you have sunrises every 90 minutes. How do you keep your body on
a normal 24 hour cycle like we have here on earth?
4. I heard that astronauts get taller in space. Did you get taller? Do you
actually feel taller?
5. Which moved you more, the scenery of the ground on your first flight in a
jet, or the view of the earth on your first flight in space? Could you
describe how you felt about each experience?
6. Do you feel a different type of tiredness from working in space verses
working on earth?
7. I want to go into space in the future. Were your trainings hard? Do you
think that a time will come in the future when an ordinary girl like me
can easily go into space?
8. I was very impressed with your capture of the HTV. Did any of your
experiences in your childhood help or contribute to the skills needed to
capture the HTV?
9. I am a swimmer, so I do strength training exercises in order to help swim
faster. Which strength training exercise in the ISS is your favorite?
10. If I went into space, I would be afraid of black holes. Does that ever
happen, that people are suddenly caught by one?
PLEASE CHECK THE FOLLOWING FOR MORE INFORMATION ON ARISS UPDATES:
Visit ARISS on Facebook. We can be found at Amateur Radio on the
International Space Station (ARISS).
To receive our Twitter updates, follow @xxxxxxxxxxxx
Next planned event(s):
1. West Michigan Aviation Academy, Grand Rapids, MI, direct via W8ISS
The ISS callsign is presently scheduled to be NA1SS
The scheduled astronaut is Kjell Lindgren KO5MOS
Contact is a go for: Thu, Oct. 22, 2015 17:15 UTC
ARISS is an international educational outreach program partnering the
volunteer support and leadership from AMSAT and IARU societies around the
world with the ISS space agencies partners: NASA, Russian Space Agency, ESA,
CNES, JAXA, and CSA.
ARISS offers an opportunity for students to experience the excitement of
Amateur Radio by talking directly with crewmembers on-board the
International Space Station. Teachers, parents and communities see, first
hand, how Amateur Radio and crewmembers on ISS can energize youngsters'
interest in science, technology, and learning. Further information on the
ARISS program is available on the website http://www.ariss.org/
Thank you & 73,
David ? AA4KN
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------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 316
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