| |
CX2SA > SATDIG 28.10.11 21:04l 1025 Lines 30163 Bytes #999 (0) @ WW
BID : AMSATBB6601
Read: GUEST
Subj: AMSAT-BB-digest V6 601
Path: IZ3LSV<IW0QNL<ON4HU<CX2ACB<CX2SA
Sent: 111028/1902Z @:CX2SA.LAV.URY.SA #:34984 [Minas] FBB7.00e $:AMSATBB6601
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: [Re: Prospero audio] (PE0SAT)
2. Re: [Re: Prospero] Commanding Error (Hacken Paste)
3. Re: [Re: Prospero] Commanding Error (Tony Abbey)
4. RAX-2? (Nigel A. Gunn, W8IFF/G8IFF)
5. Re: [Re: Prospero] Commanding Error (Tony Abbey)
6. Aubiesat heard in Europe and Alaska (Robert McGwier)
7. Wrong lable between SRMSAT JUGNU at http://celestrak.com
(Nader Omer)
----------------------------------------------------------------------
Message: 1
Date: Fri, 28 Oct 2011 12:17:28 +0200
From: "PE0SAT" <pe0sat@xxxxx.xx>
To: rjad@xxxx.xxx.xx.xx
Cc: Dale Potts <drp2@xxxx.xxx.xx.xx>, Phil Guttridge
<prg@xxxx.xxx.xx.xx>, "Graham Kimbell \(G3TCT\)" <g3tct@xxxxxxx.xxx>,
g8nsv@xxxxxxxx.xxxx Barry Hancock <bkh@xxxx.xxx.xx.xx>, "Rahil
Chaudery \(rac@xxxx.xxx.xx.xxxxx <rac@xxxx.xxx.xx.xx>, Richard Cole
<richard.cole@xxxx.xxx.xx.xx>, amsat-bb@xxxxx.xxxxxxxxx Abbey
<afa3@xxxxxxxxx.xx.xx>, Alan Smith <as@xxxx.xxx.xx.xx>
Subject: [amsat-bb] Re: [Re: Prospero audio]
Message-ID: <20111028101728.C93C01A330@xx.xxxxx.xx>
Content-Type: text/plain;charset=iso-8859-1
On Fri, October 28, 2011 11:25, Roger Duthie wrote:
Hi Roger,
> OK - so that's definitely Orbcomm (from the spectrogram). Have you got
> audio of this?
Yes I have the following audio files:
http://www.dev.vgnet.nl/bucket/files/Prospero-20-10-2011-1854CEST.wav 11,3 MB
http://www.dev.vgnet.nl/bucket/files/Prospero-21-10-2011-1906CEST.wav 92,3 MB
http://www.dev.vgnet.nl/bucket/files/Prospero-24-10-2011-1755CEST.wav 24,1 MB
Maybe you can perform some further analyses.
73 Jan PE0SAT
------------------------------
Message: 2
Date: Fri, 28 Oct 2011 10:19:25 +0000
From: Hacken Paste <dale_potts@xxxxxxx.xxx>
To: <g.shirville@xxxxxxxxxx.xxx>, roger <rjad@xxxx.xxx.xx.xx>,
<afa3@xxxxxxxxx.xx.xx>, <pe0sat@xxxxx.xx>, phil gutteridge
<prg@xxxx.xxx.xx.xx>, <amsat-bb@xxxxx.xxx>, <g8nsv@xxxxxxxx.xxx>,
<bkh@xxxx.xxx.xx.xx>, <richard.cole@xxxx.xxx.xx.xx>,
<rac@xxxx.xxx.xx.xx>, <as@xxxx.xxx.xx.xx>, <g3tct@xxxxxxx.xxx>,
<drp2@xxxx.xxx.xx.xx>
Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
Message-ID: <DUB104-W564BA23D781AEFD22C8261F0D30@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Roger,
I think only 8 of the OrbComm satellites are on 137.56.. It sounds like
it may be worth contacting OrbComm though- I'll give them a call.
Dale
On 28/10/2011 10:39, g.shirville@xxxxxxxxxx.xxx wrote:
Hi Roger,
All understood..I have put the currently 28? active Orbcomms into Nova here
and almost all of the time there is at least one above my horizon and I
can hear the chuffing noises..will be listening again this evening
Do you have details of the on board power system? For instance what
are the batteries? If the batteries have failed short circuit will they be
clamping the bus to 0volts? Can the power system work with open circuit cells?
What is/was the default power up operating mode?
good luck!
Graham
G3VZV
From: Roger Duthie
Sent: Friday, October 28, 2011 10:25 AM
To: Tony Abbey
Cc: pe0sat@xxxxx.xx ; g.shirville@xxxxxxxxxx.xxx ; Phil Guttridge ;
amsat-bb@xxxxx.xxx ; g8nsv@xxxxxxxx.xxx
; Dale Potts
; Barry Hancock
; Richard Cole ; mailto:rac@xxxx.xxx.xx.xx ; Alan Smith ; Graham Kimbell
(G3TCT)
Subject: Re: [amsat-bb] Re: [Re: Prospero] Commanding
Error
OK
- so that's definitely Orbcomm (from the spectrogram). Have you got audio
of this?
We hear a chuffing sound intermittently (ie., it comes
and goes in interval of minutes), which happens when neither Orbcomm nor
Prospero is reported by our software to be above the horizon (is this the
pager
stuff you're talking about?). We also heard another thing a couple of days
ago, though we're still not 100% on what that might have been (it appeared
to be
fading as Prospero receded to the North - though was it an aeroplane on
137.56?).
Someone yesterday has supposedly heard something that's wasn't
Orbcomm during the early evening pass. We'll look into it.
The pass
we're going to try today (for the sake of ceremony, really) is (again, times
in
BST = UT + 1):
28
Oct
7.4
15:53:18
10
S
16:00:22
86
W
16:08:28
10
N
- Roger
m0rja
Tony Abbey wrote:
Hi Roger
Once Graham told me the noise was Orbcomm this morning, I added the TLEs
for their satellites
(http://www.orbcomm.com/Collateral/Documents/English-US/o11292.tle)
to my SDR Radio software satellite definitions. Here's a pass I recorded
from one of them this morning, and you can see that the "chuff-chuff" on the
left hand side has structure which is kept vertical by the doppler
correction.
The other crap and pager cross talk etc bends with the doppler correction. I
think that proves the point.
Tony Abbey - Senior
Research Fellow (retired)
Space Research Centre
Dept of Physics and Astronomy
University of LeicesterUniversity Road SRC Web page: http://www.src.le.ac.uk
LEICESTER LE1 7RH, United
Kingdom
Spectrogram removed by RJAD (might ahve been bad for the amsat-bb board)
On 27 Oct 2011, at 16:17, Roger Duthie wrote:
We're hearing these 'chuff-chuff
swooshes' too, though at times when our software is not showing Orbcomm
over
our horizon. Our TLEs may be slightly out-of-date, though I think it
would be a marginal thing. Can it be definitely confirmed that these
noises are Orbcomm?
- Rr.
Tony Abbey wrote:
Nothing heard from Prospero here in Leicester, that pass just
finished (at 14:57Z)
Just the Orbcomm swooshes.
Tony Abbey -
Senior Research Fellow (retired)
Space Research Centre
Dept of Physics and Astronomy
University of LeicesterUniversity Road SRC Web page:
http://www.src.le.ac.uk
LEICESTER LE1 7RH, United Kingdom
On 27 Oct 2011, at 13:33, Roger Duthie wrote:
Well, we're hearing something like
that. Though we hear this a lot, we also wonder whether we''re
seeing an envelope during the Prospero pass times.
The
passes for today (BST) [from Heavens-Above]:
27 Oct
7.2
15:42:26
10
S
15:49:21
77
E
15:57:21
10
NNE
27 Oct
8.7
17:28:31
10
WSW
17:34:45
31
WNW
17:41:39
10
N
Also, I've started a Twitter hashtag
for anyone using this mode of communication: #Prospero40 Add this
to any Twitter messages you might write about Prospero or related
subjects.
-Roger
PE0SAT wrote:
Hi,
I have a spectrogram and a recording of that "chuff chuff" on
http://www.pe0sat.vgnet.nl/satellite/sat-history/prospero/
Is it the same you guys heard?
73 Jan PE0SAT
On Thu, October 27, 2011 10:04, g.shirville@xxxxxxxxxx.xxx wrote:
Hi Tony,
The chuff chuff noises are from space...they are a sort of beacon carried
on
every Orbcomm satellite. They are 125msec long pulses of 57.6kb data and
have a bandwidth of around 50kHz. They are quite distinctive when you only
hear one at a time but sometimes one can hear two or more signals at the
same time and that sort of changes the sound:)
73
Graham
G3VZV
-----Original Message-----
From: Tony Abbey
Sent: Wednesday, October 26, 2011 8:56 PM
To: rjad@xxxx.xxx.xx.xx
Cc: Phil Guttridge ; amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
Hi Roger
Nothing other than the chuff- chuff on the 1600 pass. And as you said, its
also there with Prospero over the horizon. I 'm not using a beam presently
-
using a 360deg parasitic Lindenblad for circular polarisation, but it is
susceptible to all the high power pager stuff nearby. Its just strange
that
there are elements shifting in frequency in the chuff chuff like a signal
from a real satellite.
Have just come back from a Rosat re-entry celebration!
Tony Abbey - Senior Research Fellow (retired)
Space Research Centre
Dept of Physics and Astronomy
University of Leicester
University Road SRC Web page: http://www.src.le.ac.uk
LEICESTER LE1 7RH, United Kingdom
On 26 Oct 2011, at 16:17, Roger Duthie wrote:
Tony -
We heard something intriguing after about 14:43:40 UT as the tracking
said
the satellite was on it's way off to the north pole.
The 'chuff-chuff' description reminds me of a sound we seem to hear
quite
a lot. Quite often it coincides with a pass, though I think we hear the
same (or very similar) during times when Prospero is over the horizon.
We are going to try the next pass at ~16:00UT if you want to listen in
again. Our new ploy is to wait for the last most opportune moment to
command, as the power _may_ be at it highest (longest charging of
batteries, potentially). So, we'll do short commanding at above 30o el,
and listen.
-Rr.
Tony Abbey wrote:
Hi Roger
I could hear some "chuff-chuff" noises on the last pass and they show a
related doppler shift (although I am not correcting sufficiently) as
you
can see in the attached plot. Maybe its some other noise but you never
know.
On 26 Oct 2011, at 13:39, Roger Duthie wrote:
Commanding went well, from as far as we could make out.
We're not
sure
if we're getting anything back, however.
We'll be doing this pass today, hopefully:
26 Oct 7.3 15:31:43 10 S 15:38:26 60 E 15:46:11 10 NNE [Times in BST =
UTC + 1]
-Roger
_______________________________________________
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: 3
Date: Fri, 28 Oct 2011 11:42:41 +0100
From: Tony Abbey <afa3@xxxxxxxxx.xx.xx>
To: "rjad@xxxx.xxx.xx.xxx <rjad@xxxx.xxx.xx.xx>
Cc: Dale Potts <drp2@xxxx.xxx.xx.xx>, Phil Guttridge
<prg@xxxx.xxx.xx.xx>, "Graham Kimbell \(G3TCT\)" <g3tct@xxxxxxx.xxx>,
g8nsv@xxxxxxxx.xxxx Barry Hancock <bkh@xxxx.xxx.xx.xx>, "Rahil
Chaudery \(rac@xxxx.xxx.xx.xxxxx <rac@xxxx.xxx.xx.xx>,
amsat-bb@xxxxx.xxxx Richard Cole <richard.cole@xxxx.xxx.xx.xx>, Alan
Smith <as@xxxx.xxx.xx.xx>
Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
Message-ID: <5809ED41-141E-4329-A990-31D1D5BC0D90@xxxx.xxx.xx.xx.xx>
Content-Type: text/plain; charset=us-ascii
Hi Roger
The email list increases exponentially;-)
I saw Jan's post with audio links. So just for completeness here's a file
from the same spectrogram I posted yesterday, starting at around 09:33. The
chuffs get quite loud and sometimes there's a double chuff, which I
understand maybe from two Orbcomm sats.
Tony Abbey - Senior Research Fellow (retired)
Space Research Centre
Dept of Physics and Astronomy
University of Leicester
University Road SRC Web page: http://www.src.le.ac.uk
LEICESTER LE1 7RH, United Kingdom
On 28 Oct 2011, at 10:25, Roger Duthie wrote:
> OK - so that's definitely Orbcomm (from the spectrogram). Have you got
audio of this?
>
> We hear a chuffing sound intermittently (ie., it comes and goes in
interval of minutes), which happens when neither Orbcomm nor Prospero is
reported by our software to be above the horizon (is this the pager stuff
you're talking about?). We also heard another thing a couple of days ago,
though we're still not 100% on what that might have been (it appeared to be
fading as Prospero receded to the North - though was it an aeroplane on
137.56?).
>
> Someone yesterday has supposedly heard something that's wasn't Orbcomm
during the early evening pass. We'll look into it.
>
> The pass we're going to try today (for the sake of ceremony, really) is
(again, times in BST = UT + 1):
>
> 28 Oct 7.4 15:53:18 10 S 16:00:22 86 W 16:08:28 10 N
> - Roger
> m0rja
>
> Tony Abbey wrote:
>>
>> Hi Roger
>>
>> Once Graham told me the noise was Orbcomm this morning, I added the TLEs
for their satellites
(http://www.orbcomm.com/Collateral/Documents/English-US/o11292.tle)
>> to my SDR Radio software satellite definitions. Here's a pass I recorded
from one of them this morning, and you can see that the "chuff-chuff" on the
left hand side has structure which is kept vertical by the doppler
correction. The other crap and pager cross talk etc bends with the doppler
correction. I think that proves the point.
>>
>> Tony Abbey - Senior Research Fellow (retired)
>> Space Research Centre
>> Dept of Physics and Astronomy
>> University of Leicester
>> University Road SRC Web page: http://www.src.le.ac.uk
>> LEICESTER LE1 7RH, United Kingdom
>> Spectrogram removed by RJAD (might ahve been bad for the amsat-bb board)
>>
>> On 27 Oct 2011, at 16:17, Roger Duthie wrote:
>>
>>> We're hearing these 'chuff-chuff swooshes' too, though at times when our
software is not showing Orbcomm over our horizon. Our TLEs may be slightly
out-of-date, though I think it would be a marginal thing. Can it be
definitely confirmed that these noises are Orbcomm?
>>>
>>> - Rr.
>>>
>>> Tony Abbey wrote:
>>>>
>>>> Nothing heard from Prospero here in Leicester, that pass just finished
(at 14:57Z)
>>>> Just the Orbcomm swooshes.
>>>>
>>>> Tony Abbey - Senior Research Fellow (retired)
>>>> Space Research Centre
>>>> Dept of Physics and Astronomy
>>>> University of Leicester
>>>> University Road SRC Web page: http://www.src.le.ac.uk
>>>> LEICESTER LE1 7RH, United Kingdom
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 27 Oct 2011, at 13:33, Roger Duthie wrote:
>>>>
>>>>> Well, we're hearing something like that. Though we hear this a lot,
we also wonder whether we''re seeing an envelope during the Prospero pass
times.
>>>>>
>>>>> The passes for today (BST) [from Heavens-Above]:
>>>>> 27 Oct 7.2 15:42:26 10 S 15:49:21 77 E 15:57:21 10 NNE
>>>>> 27 Oct 8.7 17:28:31 10 WSW 17:34:45 31 WNW 17:41:39 10 N
>>>>> Also, I've started a Twitter hashtag for anyone using this mode of
communication: #Prospero40 Add this to any Twitter messages you might write
about Prospero or related subjects.
>>>>>
>>>>> -Roger
>>>>>
>>>>> PE0SAT wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I have a spectrogram and a recording of that "chuff chuff" on
>>>>>> http://www.pe0sat.vgnet.nl/satellite/sat-history/prospero/
>>>>>>
>>>>>> Is it the same you guys heard?
>>>>>>
>>>>>> 73 Jan PE0SAT
>>>>>>
>>>>>>
>>>>>> On Thu, October 27, 2011 10:04, g.shirville@xxxxxxxxxx.xxx wrote:
>>>>>>
>>>>>>> Hi Tony,
>>>>>>>
>>>>>>> The chuff chuff noises are from space...they are a sort of beacon
carried
>>>>>>> on
>>>>>>> every Orbcomm satellite. They are 125msec long pulses of 57.6kb data
and
>>>>>>> have a bandwidth of around 50kHz. They are quite distinctive when
you only
>>>>>>> hear one at a time but sometimes one can hear two or more signals at
the
>>>>>>> same time and that sort of changes the sound:)
>>>>>>>
>>>>>>> 73
>>>>>>>
>>>>>>> Graham
>>>>>>> G3VZV
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Tony Abbey
>>>>>>> Sent: Wednesday, October 26, 2011 8:56 PM
>>>>>>> To: rjad@xxxx.xxx.xx.xx
>>>>>>> Cc: Phil Guttridge ; amsat-bb@xxxxx.xxx
>>>>>>> Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
>>>>>>>
>>>>>>> Hi Roger
>>>>>>>
>>>>>>> Nothing other than the chuff- chuff on the 1600 pass. And as you
said, its
>>>>>>> also there with Prospero over the horizon. I 'm not using a beam
presently
>>>>>>> -
>>>>>>> using a 360deg parasitic Lindenblad for circular polarisation, but
it is
>>>>>>> susceptible to all the high power pager stuff nearby. Its just strange
>>>>>>> that
>>>>>>> there are elements shifting in frequency in the chuff chuff like a
signal
>>>>>>> from a real satellite.
>>>>>>> Have just come back from a Rosat re-entry celebration!
>>>>>>>
>>>>>>> Tony Abbey - Senior Research Fellow (retired)
>>>>>>> Space Research Centre
>>>>>>> Dept of Physics and Astronomy
>>>>>>> University of Leicester
>>>>>>> University Road SRC Web page: http://www.src.le.ac.uk
>>>>>>> LEICESTER LE1 7RH, United Kingdom
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 26 Oct 2011, at 16:17, Roger Duthie wrote:
>>>>>>>
>>>>>>>
>>>>>>>> Tony -
>>>>>>>>
>>>>>>>> We heard something intriguing after about 14:43:40 UT as the tracking
>>>>>>>> said
>>>>>>>> the satellite was on it's way off to the north pole.
>>>>>>>>
>>>>>>>> The 'chuff-chuff' description reminds me of a sound we seem to hear
>>>>>>>> quite
>>>>>>>> a lot. Quite often it coincides with a pass, though I think we
hear the
>>>>>>>> same (or very similar) during times when Prospero is over the
horizon.
>>>>>>>>
>>>>>>>> We are going to try the next pass at ~16:00UT if you want to listen
in
>>>>>>>> again. Our new ploy is to wait for the last most opportune moment to
>>>>>>>> command, as the power _may_ be at it highest (longest charging of
>>>>>>>> batteries, potentially). So, we'll do short commanding at above
30o el,
>>>>>>>> and listen.
>>>>>>>>
>>>>>>>> -Rr.
>>>>>>>>
>>>>>>>> Tony Abbey wrote:
>>>>>>>>
>>>>>>>>> Hi Roger
>>>>>>>>>
>>>>>>>>> I could hear some "chuff-chuff" noises on the last pass and they
show a
>>>>>>>>> related doppler shift (although I am not correcting sufficiently) as
>>>>>>>>> you
>>>>>>>>> can see in the attached plot. Maybe its some other noise but you
never
>>>>>>>>> know.
>>>>>>>>>
>>>>>>>>> On 26 Oct 2011, at 13:39, Roger Duthie wrote:
>>>>>>>>>
>>>>>>>>>> Commanding went well, from as far as we could make out. We're not
>>>>>>>>>> sure
>>>>>>>>>> if we're getting anything back, however.
>>>>>>>>>>
>>>>>>>>>> We'll be doing this pass today, hopefully:
>>>>>>>>>>
>>>>>>>>>> 26 Oct 7.3 15:31:43 10 S 15:38:26 60 E 15:46:11 10 NNE [Times in
BST =
>>>>>>>>>> UTC + 1]
>>>>>>>>>>
>>>>>>>>>> -Roger
>>>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> 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: 4
Date: Fri, 28 Oct 2011 17:50:55 +0100
From: "Nigel A. Gunn, W8IFF/G8IFF" <nigel@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] RAX-2?
Message-ID: <4EAADD6F.8000601@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Is this it?
Object B has no element set.
OBJECT A
1 37849U 11061A 11301.51739898 -.00002410 76178-5 00000+0 0 33
2 37849 107.3274 232.9875 0402126 334.5924 023.5976 15.36312973 00
On 28/10/11 17:28, amsat-bb-request@xxxxx.xxx wrote:
> Message: 1
> Date: Fri, 28 Oct 2011 07:56:45 -0400
> From: Robert McGwier<rwmcgwier@xxxxx.xxx>
> To: James Cutler<jwcutler@xxxxx.xxx>
> Cc:amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: RAX-2 Launch In 30 Minutes
> Message-ID:
> <CA+K5gze21HsNwtQeNnDdaQxRfy0KJbe7gU8LO=+aU26TRup-hQ@xxxx.xxxxx.xxx>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Congratulations to your team, Auburn, UTAH, and the rest!
>
> On Fri, Oct 28, 2011 at 7:43 AM, James Cutler<jwcutler@xxxxx.xxx> wrote:
>
>> > Launch was great. PPods have deployed! First transmission in about 30
>> > minutes or so.
------------------------------
Message: 5
Date: Fri, 28 Oct 2011 18:07:54 +0100
From: Tony Abbey <afa3@xxxxxxxxx.xx.xx>
To: "rjad@xxxx.xxx.xx.xxx <rjad@xxxx.xxx.xx.xx>
Cc: Dale Potts <drp2@xxxx.xxx.xx.xx>, Phil Guttridge
<prg@xxxx.xxx.xx.xx>, "Graham Kimbell \(G3TCT\)" <g3tct@xxxxxxx.xxx>,
g8nsv@xxxxxxxx.xxxx Barry Hancock <bkh@xxxx.xxx.xx.xx>, "Rahil
Chaudery \(rac@xxxx.xxx.xx.xxxxx <rac@xxxx.xxx.xx.xx>,
amsat-bb@xxxxx.xxxx Richard Cole <richard.cole@xxxx.xxx.xx.xx>, Alan
Smith <as@xxxx.xxx.xx.xx>
Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
Message-ID: <3A4177F1-448B-4C92-A0FF-B8D1C63704CE@xxxx.xxx.xx.xx.xx>
Content-Type: text/plain; charset=us-ascii
Hi Roger et al
The spectrogram attached for the 1310z Prospero pass today shows a carrier
between 13:16 and 13:20 that matches the Prospero doppler profile (pretty
well vertical), and exactly on 137.560MHz.
There was some Orbcomm chuffing reasonably weak in the background, so it
could be an Orbcomm satellite that exactly matched the doppler profile for
Prospero.
I couldnt hear anything significant in the audio. This was received with a
non directional antenna. Do you have a similar spectrogram received with a
beam antenna. If the signal wasn't there then we may assume it was from
Orbcomm or similar in a different beam direction.
cheers all
Tony Abbey - Senior Research Fellow (retired)
Space Research Centre
Dept of Physics and Astronomy
University of Leicester
University Road SRC Web page: http://www.src.le.ac.uk
LEICESTER LE1 7RH, United Kingdom
On 28 Oct 2011, at 10:25, Roger Duthie wrote:
> OK - so that's definitely Orbcomm (from the spectrogram). Have you got
audio of this?
>
> We hear a chuffing sound intermittently (ie., it comes and goes in
interval of minutes), which happens when neither Orbcomm nor Prospero is
reported by our software to be above the horizon (is this the pager stuff
you're talking about?). We also heard another thing a couple of days ago,
though we're still not 100% on what that might have been (it appeared to be
fading as Prospero receded to the North - though was it an aeroplane on
137.56?).
>
> Someone yesterday has supposedly heard something that's wasn't Orbcomm
during the early evening pass. We'll look into it.
>
> The pass we're going to try today (for the sake of ceremony, really) is
(again, times in BST = UT + 1):
>
> 28 Oct 7.4 15:53:18 10 S 16:00:22 86 W 16:08:28 10 N
> - Roger
> m0rja
>
> Tony Abbey wrote:
>>
>> Hi Roger
>>
>> Once Graham told me the noise was Orbcomm this morning, I added the TLEs
for their satellites
(http://www.orbcomm.com/Collateral/Documents/English-US/o11292.tle)
>> to my SDR Radio software satellite definitions. Here's a pass I recorded
from one of them this morning, and you can see that the "chuff-chuff" on the
left hand side has structure which is kept vertical by the doppler
correction. The other crap and pager cross talk etc bends with the doppler
correction. I think that proves the point.
>>
>> Tony Abbey - Senior Research Fellow (retired)
>> Space Research Centre
>> Dept of Physics and Astronomy
>> University of Leicester
>> University Road SRC Web page: http://www.src.le.ac.uk
>> LEICESTER LE1 7RH, United Kingdom
>> Spectrogram removed by RJAD (might ahve been bad for the amsat-bb board)
>>
>> On 27 Oct 2011, at 16:17, Roger Duthie wrote:
>>
>>> We're hearing these 'chuff-chuff swooshes' too, though at times when our
software is not showing Orbcomm over our horizon. Our TLEs may be slightly
out-of-date, though I think it would be a marginal thing. Can it be
definitely confirmed that these noises are Orbcomm?
>>>
>>> - Rr.
>>>
>>> Tony Abbey wrote:
>>>>
>>>> Nothing heard from Prospero here in Leicester, that pass just finished
(at 14:57Z)
>>>> Just the Orbcomm swooshes.
>>>>
>>>> Tony Abbey - Senior Research Fellow (retired)
>>>> Space Research Centre
>>>> Dept of Physics and Astronomy
>>>> University of Leicester
>>>> University Road SRC Web page: http://www.src.le.ac.uk
>>>> LEICESTER LE1 7RH, United Kingdom
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 27 Oct 2011, at 13:33, Roger Duthie wrote:
>>>>
>>>>> Well, we're hearing something like that. Though we hear this a lot,
we also wonder whether we''re seeing an envelope during the Prospero pass
times.
>>>>>
>>>>> The passes for today (BST) [from Heavens-Above]:
>>>>> 27 Oct 7.2 15:42:26 10 S 15:49:21 77 E 15:57:21 10 NNE
>>>>> 27 Oct 8.7 17:28:31 10 WSW 17:34:45 31 WNW 17:41:39 10 N
>>>>> Also, I've started a Twitter hashtag for anyone using this mode of
communication: #Prospero40 Add this to any Twitter messages you might write
about Prospero or related subjects.
>>>>>
>>>>> -Roger
>>>>>
>>>>> PE0SAT wrote:
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I have a spectrogram and a recording of that "chuff chuff" on
>>>>>> http://www.pe0sat.vgnet.nl/satellite/sat-history/prospero/
>>>>>>
>>>>>> Is it the same you guys heard?
>>>>>>
>>>>>> 73 Jan PE0SAT
>>>>>>
>>>>>>
>>>>>> On Thu, October 27, 2011 10:04, g.shirville@xxxxxxxxxx.xxx wrote:
>>>>>>
>>>>>>> Hi Tony,
>>>>>>>
>>>>>>> The chuff chuff noises are from space...they are a sort of beacon
carried
>>>>>>> on
>>>>>>> every Orbcomm satellite. They are 125msec long pulses of 57.6kb data
and
>>>>>>> have a bandwidth of around 50kHz. They are quite distinctive when
you only
>>>>>>> hear one at a time but sometimes one can hear two or more signals at
the
>>>>>>> same time and that sort of changes the sound:)
>>>>>>>
>>>>>>> 73
>>>>>>>
>>>>>>> Graham
>>>>>>> G3VZV
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Tony Abbey
>>>>>>> Sent: Wednesday, October 26, 2011 8:56 PM
>>>>>>> To: rjad@xxxx.xxx.xx.xx
>>>>>>> Cc: Phil Guttridge ; amsat-bb@xxxxx.xxx
>>>>>>> Subject: [amsat-bb] Re: [Re: Prospero] Commanding Error
>>>>>>>
>>>>>>> Hi Roger
>>>>>>>
>>>>>>> Nothing other than the chuff- chuff on the 1600 pass. And as you
said, its
>>>>>>> also there with Prospero over the horizon. I 'm not using a beam
presently
>>>>>>> -
>>>>>>> using a 360deg parasitic Lindenblad for circular polarisation, but
it is
>>>>>>> susceptible to all the high power pager stuff nearby. Its just strange
>>>>>>> that
>>>>>>> there are elements shifting in frequency in the chuff chuff like a
signal
>>>>>>> from a real satellite.
>>>>>>> Have just come back from a Rosat re-entry celebration!
>>>>>>>
>>>>>>> Tony Abbey - Senior Research Fellow (retired)
>>>>>>> Space Research Centre
>>>>>>> Dept of Physics and Astronomy
>>>>>>> University of Leicester
>>>>>>> University Road SRC Web page: http://www.src.le.ac.uk
>>>>>>> LEICESTER LE1 7RH, United Kingdom
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 26 Oct 2011, at 16:17, Roger Duthie wrote:
>>>>>>>
>>>>>>>
>>>>>>>> Tony -
>>>>>>>>
>>>>>>>> We heard something intriguing after about 14:43:40 UT as the tracking
>>>>>>>> said
>>>>>>>> the satellite was on it's way off to the north pole.
>>>>>>>>
>>>>>>>> The 'chuff-chuff' description reminds me of a sound we seem to hear
>>>>>>>> quite
>>>>>>>> a lot. Quite often it coincides with a pass, though I think we
hear the
>>>>>>>> same (or very similar) during times when Prospero is over the
horizon.
>>>>>>>>
>>>>>>>> We are going to try the next pass at ~16:00UT if you want to listen
in
>>>>>>>> again. Our new ploy is to wait for the last most opportune moment to
>>>>>>>> command, as the power _may_ be at it highest (longest charging of
>>>>>>>> batteries, potentially). So, we'll do short commanding at above
30o el,
>>>>>>>> and listen.
>>>>>>>>
>>>>>>>> -Rr.
>>>>>>>>
>>>>>>>> Tony Abbey wrote:
>>>>>>>>
>>>>>>>>> Hi Roger
>>>>>>>>>
>>>>>>>>> I could hear some "chuff-chuff" noises on the last pass and they
show a
>>>>>>>>> related doppler shift (although I am not correcting sufficiently) as
>>>>>>>>> you
>>>>>>>>> can see in the attached plot. Maybe its some other noise but you
never
>>>>>>>>> know.
>>>>>>>>>
>>>>>>>>> On 26 Oct 2011, at 13:39, Roger Duthie wrote:
>>>>>>>>>
>>>>>>>>>> Commanding went well, from as far as we could make out. We're not
>>>>>>>>>> sure
>>>>>>>>>> if we're getting anything back, however.
>>>>>>>>>>
>>>>>>>>>> We'll be doing this pass today, hopefully:
>>>>>>>>>>
>>>>>>>>>> 26 Oct 7.3 15:31:43 10 S 15:38:26 60 E 15:46:11 10 NNE [Times in
BST =
>>>>>>>>>> UTC + 1]
>>>>>>>>>>
>>>>>>>>>> -Roger
>>>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> 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: Fri, 28 Oct 2011 14:02:17 -0400
From: Robert McGwier <rwmcgwier@xxxxx.xxx>
To: amsat bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Aubiesat heard in Europe and Alaska
Message-ID:
<CA+K5gzekvwQM66v7NepRy7UCysuniSVH+skNcgZ7tZJG8DnYVg@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
War Eagle
--
Bob McGwier
Facebook: N4HYBob
ARS: N4HY
------------------------------
Message: 7
Date: Fri, 28 Oct 2011 11:43:05 -0700 (PDT)
From: Nader Omer <st2nh@xxxxx.xxx>
To: amsat bb bb <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Wrong lable between SRMSAT JUGNU at
http://celestrak.com
Message-ID:
<1319827385.6655.YahooMailClassic@xxxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
?
HI? all
?
I've noticed a wrong lable??between ?SRMSAT and JUGNU satellite at
http://celestrak.com
?
73 Nader
?
?
?
Hi All
SRMSAT? and Jugnu TLE's has been updated and ID has been provided by
SPACETRAK, please find the same at celestrak/NORAD
http://celestrak.com/NORAD/elements/tle-new.txt
73's
KF5HDB
Sandeep Mani Tripathi
Team SRMSAT
Chennai,India
+919884858514
------------------------------
_______________________________________________
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 601
****************************************
Read previous mail | Read next mail
| |
