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CX2SA > SATDIG 04.08.11 10:57l 679 Lines 21995 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: SDX works (Andrew Glasbrenner)
2. Re: ARISSat-1 over ZL (Phil Karn)
3. Re: a little perspective (Phil Karn)
4. Re: ARISSat-1 02.55 (Phil Karn)
5. Re: SDX works & in the UK (David Barber)
6. Re: SDX works (Phil Karn)
7. ARISSat-1 Report (GW1FKY@xxx.xxxx
8. ARISSat-1 04.37 (Ulip ?eljko)
9. Re: ARISSat-1 over ZL (Alan Cresswell)
10. Arissat-1 sstv received (andy thomas)
11. Russia Today reports Kedr deployment (andy thomas)
12. ONE ARISSAT ANTENNA MISSING, Reports Novosti (andy thomas)
13. Re: Today's Success (i8cvs)
14. ARISSat over UK - 07.45utc Pass (David Barber)
15. ARISSat-1 RECEPTION REPORT (Mani VU2WMY)
16. ARISSat-1/Kedr Heard in Florida 2nd time (Mike Schaffer)
17. Re: ARISSat-1 - Photos from NASA TV (Phil Karn)
18. Heard ARISSat-1 during 0555 UTC pass over Washington, DC
(Dinesh Cyanam)
----------------------------------------------------------------------
Message: 1
Date: Thu, 04 Aug 2011 02:03:15 -0400
From: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: SDX works
To: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4E3A3623.1070704@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Still works on 0550Z pass, but just me on. Off to bed.
73, Drew
On 8/4/2011 1:26 AM, Andrew Glasbrenner wrote:
> On 8/4/2011 12:28 AM, Andrew Glasbrenner wrote:
>> I was able to hear myself with as little as 1 watt on the 0425Z pass.
>> Antennas are a M2 CP42 on RHCP up, and a 10 element horizontal yagi
>> down. Sounded VERY good, and cycled on and off with the telemetry. I
>> also managed to grab 2 frames of tlm right after AOS. I have a wav file
>> of the transponder test.
>>
>> 73, Drew KO4MA
>>
> Video, well, audio with a picture, here:
> http://www.youtube.com/watch?v=0AFyZNAbOeA
>
> 73, Drew KO4MA
> _______________________________________________
> 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, 03 Aug 2011 23:12:45 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 over ZL
To: Alan Cresswell <alancresswell@xxxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4E3A385D.8030501@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/3/11 7:24 PM, Alan Cresswell wrote:
> Another ARISSat-1 pass over ZL. 0206UT, 27 deg.
> Good telemetry but nothing on the transponder.
> 19 data frames and 23 Kursk frames uploaded.
Could you hear any receiver noise in the transponder passband?
------------------------------
Message: 3
Date: Wed, 03 Aug 2011 23:16:59 -0700
From: Phil Karn <karn@xxxx.xxx>
Subject: [amsat-bb] Re: a little perspective
To: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4E3A395B.8010006@xxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/3/11 8:21 PM, Jim Jerzycke wrote:
> At least AO-40 had a usable life for some. This thing is just another
> squawk box in space, like all the "student" satellites that are using
> the Amateur Radio frequencies for a free downlink.
ARISSat is still a little more than that. It's a good engineering test
for a new spacecraft bus that was primarily built by AMSAT volunteers
and who can apply that design and experience for future spacecraft.
There are a number of new amateur technologies on ARISSat-1, and aside
from the transponder input they all seem to be working.
------------------------------
Message: 4
Date: Wed, 03 Aug 2011 23:22:55 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 02.55
To: g0mrf@xxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4E3A3ABF.7070404@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/3/11 8:39 PM, g0mrf@xxx.xxx wrote:
> Apx. 6 second spin period puts deep nulls in transmitted signal. -
> Not sure if this is due to linear polarisation of my receive antenna
> or blockage from spacecraft.
Since we don't have video of the actual deployment we don't know how it
was turning at release.
But remember the physics of this. Any body that isn't absolutely rigid
will eventually settle down to a stable spin about the axis with the
greatest moment of inertia. That configuration minimizes kinetic energy
while still conserving angular momentum.
Although ARISSat-1 doesn't have any nutation dampers that I'm aware of,
the slightest flexing of the structure, the antenna (singular), even
tiny movements of the cables inside, will dissipate energy and convert
any complex tumbling motion into a smooth spin about the preferred axis.
That axis includes the antenna, so it shouldn't fade due to spinning.
So it may simply take some time to settle down into a stable spin
without frequent deep fading.
Phil
------------------------------
Message: 5
Date: Thu, 4 Aug 2011 07:25:02 +0100
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] Re: SDX works & in the UK
To: "'Andrew Glasbrenner'" <glasbrenner@xxxxxxxxxx.xxx>, "'Amsat-BB'"
<amsat-bb@xxxxx.xxx>
Message-ID: <9B794A25373849C99BB022D19968DFEE@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Latest UK pass 06.08utc could just hear my own CW using 50W to a collinear.
Excellent!
No go with SSB though but hardly surprising I suppose given my antenna.
David
G8OQW
********
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Andrew Glasbrenner
Sent: 04 August 2011 07:03
To: Amsat-BB
Subject: [amsat-bb] Re: SDX works
Still works on 0550Z pass, but just me on. Off to bed.
73, Drew
On 8/4/2011 1:26 AM, Andrew Glasbrenner wrote:
> On 8/4/2011 12:28 AM, Andrew Glasbrenner wrote:
>> I was able to hear myself with as little as 1 watt on the 0425Z pass.
>> Antennas are a M2 CP42 on RHCP up, and a 10 element horizontal yagi
>> down. Sounded VERY good, and cycled on and off with the telemetry. I
>> also managed to grab 2 frames of tlm right after AOS. I have a wav file
>> of the transponder test.
>>
>> 73, Drew KO4MA
>>
> Video, well, audio with a picture, here:
> http://www.youtube.com/watch?v=0AFyZNAbOeA
>
> 73, Drew KO4MA
> _______________________________________________
> 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: 6
Date: Wed, 03 Aug 2011 23:27:55 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: SDX works
To: Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx>
Cc: Amsat-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4E3A3BEB.1060500@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/3/11 9:28 PM, Andrew Glasbrenner wrote:
> I was able to hear myself with as little as 1 watt on the 0425Z pass.
> Antennas are a M2 CP42 on RHCP up, and a 10 element horizontal yagi
> down. Sounded VERY good, and cycled on and off with the telemetry. I
> also managed to grab 2 frames of tlm right after AOS. I have a wav file
> of the transponder test.
Now *THIS* is the best news I've heard all day since the deployment and
initial reception reports!!
Perhaps the transponder is disabled in low-power mode during night passes?
Remember this spacecraft is carrying a silver-zinc battery. While
nominally rechargeable, this type of battery has a very short cycle life
usually specified in the single digits. This is the reason for the
conservatism in eclipse operation. Without that battery, the computer
will regularly reset in eclipse and the spacecraft won't behave nearly
as well as we'd like.
------------------------------
Message: 7
Date: Thu, 4 Aug 2011 02:46:26 -0400 (EDT)
From: GW1FKY@xxx.xxx
Subject: [amsat-bb] ARISSat-1 Report
To: amsat-bb@xxxxx.xxx
Message-ID: <114ab6.59d003ae.3b6b9a42@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi all,
Listened for ARISSat-1 at 0605 hrs GMT here in Wales -UK.
This pass was a low angle but I had no problems in hearing the
transmissions on 145.825 Mhz, the satellite sounded very healthy and the
voice and
SSTV very clear indeed.
"My sincere congratulations" to all concerned and of course to all whom
gave the support to enable the project to proceed. "Amateur Radio " is
well spoken for in its voice announcement.
Regards
Ken Eaton
GW1FKY
Amasat-UK
Amsat NA
------------------------------
Message: 8
Date: Thu, 4 Aug 2011 06:52:11 +0000
From: Ulip ?eljko <Zeljko.Ulip@xxxxxxxx.xx>
Subject: [amsat-bb] ARISSat-1 04.37
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID:
<D2F3CFE0779EDA4495D6CDB04F110D8A0469F9@xxxxxxxxxxx.xxx.xxxxxxxx.xx>
Content-Type: text/plain; charset="iso-8859-2"
This morning at 04:37 UTC a good pass over Zagreb, Croatia. VHF / UHF linear
transponder has worked fairly well. I heard my own signal with the strength
55-56. There is relatively strong noise in the linear transponder receiver.
There was no one to answer to my CQ. Received two SSTV images (SSB and FM).
The voice messages are of excellent quality. Telemetry is a good all modes
(voice, CW and BPSK).
See you on ARISSat-1
73
Zeljko 9A2EY
------------------------------
Message: 9
Date: Thu, 4 Aug 2011 07:09:11 -0000
From: "Alan Cresswell" <alancresswell@xxxx.xx.xx>
Subject: [amsat-bb] Re: ARISSat-1 over ZL
To: "'Phil Karn'" <karn@xxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <C332893B0E4A4FEEBB09C6DC6C11869E@xxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Hi Phil,
The first few passes I concentrated on telemetry.
On my last 18 deg pass I was copying myself through the transponder but with
a poor signal. On my just completed pass I was getting good signals back
from the transponder but with a strong 6 second polarization fade.
The satellite went into eclipse halfway through the current pass and went to
its on/off mode.
73
Alan
ZL2BX
-----Original Message-----
From: Phil Karn [mailto:karn@xxxxxxxx.xxxx
Sent: Thursday, 4 August 2011 06:13
To: Alan Cresswell
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] ARISSat-1 over ZL
On 8/3/11 7:24 PM, Alan Cresswell wrote:
> Another ARISSat-1 pass over ZL. 0206UT, 27 deg.
> Good telemetry but nothing on the transponder.
> 19 data frames and 23 Kursk frames uploaded.
Could you hear any receiver noise in the transponder passband?
-----
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------------------------------
Message: 10
Date: Thu, 4 Aug 2011 08:11:16 +0100 (BST)
From: andy thomas <andythomasmail@xxxxx.xx.xx>
Subject: [amsat-bb] Arissat-1 sstv received
To: amsat-bb@xxxxx.xxx
Message-ID:
<1312441876.84597.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Robot-36 picture received but vey noisy on 145950, 0436 is the timestamp.
I am confused by the -bb reports of FM signals - I think 145825 and 437550
are relays from the ISS and therefore I'd expect them to be far stronger. ??
73 de andy g0SFJ
------------------------------
Message: 11
Date: Thu, 4 Aug 2011 08:18:40 +0100 (BST)
From: andy thomas <andythomasmail@xxxxx.xx.xx>
Subject: [amsat-bb] Russia Today reports Kedr deployment
To: amsat-bb@xxxxx.xxx
Message-ID:
<1312442320.62412.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Guys
you won't like it - brace yourself:
BEGINS
New satellite to commemorate first space flight
permalink email story to a friend print version Published: 03 August, 2011,
20:02
Two Russian cosmonauts have left the International Space Station for a
six-hour spacewalk to mark the 50th anniversary of the first-ever manned
space flight by Yuri Gagarin with the launch of the unique microsatellite.
?The cosmonauts will spend about six hours outside the ISS and for the first
time ever computerized Orlan-MK spacesuits with liquid crystal displays will
give advice and instructions in case of emergency situations, such as
increased oxygen consumption.
During the spacewalk, the cosmonauts will launch a microsatellite made
entirely by Russian university students.
The satellite ? which is dubbed ?Kedr? (cedar) after Yuri Gagarin?s call
sign ? will be broadcasting greeting messages from outer space in 50
different languages to mark the 50th anniversary of the first-ever manned
space flight.
The cosmonauts will also install laser communication equipment on the
outside of the Russian segment of the ISS. However, it does not mean
high-speed internet will be available in the Russian segment, as long as
?the new optical equipment is intended primarily to transfer science video
to enhance the efficiency of the scientific activity of the cosmonauts,? the
head of the extravehicular activity department of RSC Energia, Aleksandr
Polishchuk said.
With the US Shuttle program shutting down last month, Russia is currently
the only nation able to send people to the stars.
ENDS
http://rt.com/news/first-space-flight-satellite/
and a video of the deployment
73 de andy G0SFJ
------------------------------
Message: 12
Date: Thu, 4 Aug 2011 08:20:59 +0100 (BST)
From: andy thomas <andythomasmail@xxxxx.xx.xx>
Subject: [amsat-bb] ONE ARISSAT ANTENNA MISSING, Reports Novosti
To: amsat-bb@xxxxx.xxx
Message-ID:
<1312442459.48992.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
02:28 04/08/2011MISSION CONTROL, August 4 (RIA Novosti)
Related News
Two Russian cosmonauts leave ISS for spacewalk
ISS crew to launch mini-satellite on August 3
Multimedia
Spacewalk
Humans in space: results of the past 50 years
International Space Station
Two Russian cosmonauts, Alexander Samokutyayev and Sergei Volkov, completed
their 6-hour spacewalk on Thursday with a 40-minute delay and returned to
the Russian segment of the International Space Station (ISS).
They carried out a manual launch of a mini-satellite and installed new
stream video equipment on the station's outer surface.
This was the first spacewalk for Samokutyayev and the third for his
colleague Volkov.
The launch of the Kedr mini-satellite, designed to transmit greeting
messages in 17 languages, Earth photos and telemetry data from its service
systems, was delayed after the cosmonauts discovered that one of its two
antennas was missing, but they nevertheless launched the satellite with only
one antenna.
The cosmonauts also installed three containers with microorganisms and
mushroom spores on the Pirs docking compartment to study their influence on
materials used in spacecraft construction.
At the end of their spacewalk, the Russians took pictures holding photos of
the first cosmonaut Yury Gagarin, spacecraft designer Sergei Korolyov and
Soviet astronautic theory pioneer Konstantin Tsiolkovsky with Earth in the
background.
http://en.rian.ru/science/20110804/165547335.html
73 de andy g0sfj
------------------------------
Message: 13
Date: Thu, 4 Aug 2011 10:20:50 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Today's Success
To: "Amsat - BBs" <amsat-bb@xxxxx.xxx>, "Edward R. Cole"
<kl7uw@xxxxxxxxx.xxx>
Message-ID: <001301cc527f$6bfbf3a0$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Ed, KL7UW
I agree completely with you........Well said !
73" de
i8CVS Domenico
former # 798
----- Original Message -----
From: "Edward R. Cole" <kl7uw@xxxxxxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Thursday, August 04, 2011 1:23 AM
Subject: [amsat-bb] Today's Success
> I'll try to keep this short...."Whose Success?"
>
> If I were still a member of Amsat, I would be very upset with the
> handling of this project. There is nothing for the contributions
> that ham radio members invested. It ends up only glory for ARISS and
> the Russian's commemoration of Yuri Gagarin.
>
> I would vote to cut the relationship between Amsat and ARISS. It
> isn't offering anything for ham radio. Let ARISS raise their own
> funds and build their own educational satellites. Those that want to
> contribute to that, go ahead. Amsat was created to build satellites
> capable of ham radio communications (and be used by hams)...this
> education outreach was added, much later.
>
> But then I quit Amsat after 36-years. You know what? Keep this up
> and it could become a trend.
>
> Ed - KL7UW
> former #3212
>
> PS: They were right about my proposal: It would fail. Now you have
> the evidence.
------------------------------
Message: 14
Date: Thu, 4 Aug 2011 09:28:33 +0100
From: "David Barber" <david.barber@xxxxxxxxxxxxx.xx.xx>
Subject: [amsat-bb] ARISSat over UK - 07.45utc Pass
To: "'Amsat-BB'" <amsat-bb@xxxxx.xxx>
Message-ID: <F83CFB3970DC435A88E3D4DA7709B9A0@xxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
UK Pass 07.45utc.
Last pass of the day at only just 10dg elevation and I managed to capture 2
telemetry frames and 2 Kursk frames amongst all the local crud and noise.
Good to get the whole set first time round, great fun.
Thanks guys.
David
G8OQW
********
------------------------------
Message: 15
Date: Thu, 04 Aug 2011 14:01:26 +0530
From: Mani VU2WMY <wmy@xxxx.xxx.xx>
Subject: [amsat-bb] ARISSat-1 RECEPTION REPORT
To: "BB, AMSAT" <amsat-bb@xxxxx.xxx>
Message-ID: <201108040831.p748VvHn004429@xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; DelSp="Yes"; format="flowed"
RECEPTION REPORT
I am herewith posting my ARISSat 1 reception report.
Frequency: 145.950MHz
Modulation Mode:FM
Languages:?English
Date Heard(UTC):Aug.4,2011
Time Heard(UTC): 03:20
??
Reception Quality?
S?Strength???? 3?
I?Interference???4?
N?Noise??? 4?
P?Propagation Disturbance???3?
O?Overall Merit???3
Receiver: YAESU FT 847?
Antenna Using: Diamond X-510 Stacked vertical.
Programme Details:
"Hi.This is ARISSat-1.Radio Satellite.RS01S."(Female voice
announcement.) followed by male voice announcement and SSTV signal.
Request QSL.
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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------------------------------
Message: 16
Date: Wed, 3 Aug 2011 23:06:58 -0700 (PDT)
From: Mike Schaffer <daetsort@xxxxx.xxx>
Subject: [amsat-bb] ARISSat-1/Kedr Heard in Florida 2nd time
To: amsat-bb@xxxxx.xxx
Message-ID:
<1312438018.47646.YahooMailRC@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
ARISSat-1/Kedr heard female voice telemetry at 0557 UTC with antenna azimuth
at
northwest and elevation 15 degrees while over western Tennessee.
Mike Schaffer/KA3JAW
------------------------------
Message: 17
Date: Wed, 03 Aug 2011 23:11:27 -0700
From: Phil Karn <karn@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: ARISSat-1 - Photos from NASA TV
To: Burns Fisher <burns@xxxxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4E3A380F.6070401@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
On 8/3/11 5:56 PM, Burns Fisher wrote:
> Thanks to everyone who posted pictures. I think Phil Karn's picture number
> 9204 is particularly interesting. It almost looks like something coming
> out of the collar and bending back and down away from the camera. Any
> chance that is an antenna stuck somewhere?
Actually, none of the stills are really as good as the video they were
taken from. The satellite is moving around and the changing camera
perspective better shows the antenna connector sleeve in 3-D. The
lighter object inside the sleeve appeared to be about 1cm below the top
end of the sleeve. It also seemed to have a 3-pointed cross section,
almost like a miniature Oscar-10 shape. Having never seen the flight
hardware, and having seen pictures only of the construction of the
antenna, not the dummy load/terminator, I couldn't decide for sure what
I was seeing.
I took these shots later in the EVA when they were asked to look again
at the 70cm antenna and show it on camera.
------------------------------
Message: 18
Date: Thu, 4 Aug 2011 02:25:40 -0400
From: Dinesh Cyanam <dinesh@xxxxxx.xxx>
Subject: [amsat-bb] Heard ARISSat-1 during 0555 UTC pass over
Washington, DC
To: amsat-bb@xxxxx.xxx
Message-ID: <6035E951-B995-4A2B-B096-B092A182B41B@xxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Heard the FM transmission of ARISSat -1 during the 0555 UTC (0155 EST) pass
over Washington, DC. It was very loud and clear with my Wouxun handheld and
3-el tape measure Yagi. I am pretty sure a rubber duck antenna is more than
enough.
73,
Dinesh Cyanam
KC2YQJ
------------------------------
_______________________________________________
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 423
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