Date   

Nexus card

Bill Maddox
 

I have the Hauppauge nexus-s card I beleive its a skystar 1 but not
sure. Does anyone have this card running with the Tellicast system.

Been using the card for sat TV for a long time but never used it for
data until recently on the sat at once service.

Regards
Bill


Fw: Data?????

Ian S Deans <ian@...>
 

----- Original Message -----
From: "Ian S Deans" <ian@...>
To: <MSG-1@...>
Sent: Thursday, December 11, 2003 4:15 PM
Subject: Re: [MSG-1] Data?????


John,

MSG has been back to normal full scans since 11.30 UTC so problem
unfortunately must be at your end. There does however appear to be a
problem
with channel 6 although I don't take that channel myself. It would also
appear that the 15.15 UTC cycle was not sent, but everything else ok.

Hope that helps.

Regards

Ian


Re: Data?????

Ian S Deans <ian@...>
 

John,

MSG has been back to normal full scans since 11.30 UTC so problem
unfortunately must be at your end. There does however appear to be a problem
with channel 6 although I don't take that channel myself. It would also
appear that the 15.15 UTC cycle was not sent, but everything else ok.

Hope that helps.

Regards

Ian


Re: Data?????

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Is anyone getting pictures? Or have I broken something?
John, data has been fine here from the 11:30 repeat cycle onwards,
athough channel 6 (WV_073) has been rather more off than on.
Nothing from Eumetsat about this problem.

[For those using the MSG Data Manager, I would suggest turning
off "Wait for segments" for one scan of the receive PC every so
often just to clear the channel 6 segments. Or delete them from the
Tellique received folder.]

Cheers,
David


Re: Data?????

John Parkins <john@...>
 

Hello,

Panic over...... Operator error, looking for the files in the wrong
place!

DUH!!

Thursday, December 11, 2003, 3:32:33 PM, you wrote:

JP> Hello All,


JP> I've had the RX computer off for most of this morning, upgrading a few
JP> things and I've just managed to get it back on. Loads of data going
JP> through but nothing in the log and nothing in the received folder. I
JP> knew there were going to be interruptions today but I thought they
JP> were meant to end at 12:00. Is anyone getting pictures? Or have I
JP> broken something?







--
Best regards,
John mailto:kvp@...


Data?????

John Parkins <john@...>
 

Hello All,


I've had the RX computer off for most of this morning, upgrading a few
things and I've just managed to get it back on. Loads of data going
through but nothing in the log and nothing in the received folder. I
knew there were going to be interruptions today but I thought they
were meant to end at 12:00. Is anyone getting pictures? Or have I
broken something?




--
Best regards,
John mailto:kvp@...


Re: newbie setting up for MSG

Robert Moore
 

Agree. Our collective experience seems to be that the two-PC approach is best by
far, but one will work OK, though the lower spec the less can be done with
other memory-hungry programs without interfering with MSG-1 data.
Once anyone gets hooked I guess they will be saving hard for that second PC (or,
I suppose, giving up all other activities on the one PC!).
Robert





Quoting David Taylor <david-taylor@...>:

1. I want a system that acts like a Meteosat WEFAX system - to
be able to view a European or global sector every 1/2 hour in either
VIS or IR and animate it. Every 1/4 hour would be preferable but
one has to be realistic. Can I do that and what system spec would I
require - one or two computers?

One dedicated computer (but I don't recommend that) or two PCs
networked. Spec for processing (or single) PC: 1-2GHz+ processor,
512MB-1GB memory (1GB memory if you want to use the HRV or Meteosat-
5 visible channel). Fast hard disks with 2MB or 8MB buffers. See
below for second Receiver PC spec.

2. I want 24 hour full imaging and animation and want real-time
display of any channel I chose. Can I do that and what system spec
do I need - two computer I suspect?

Same answer as above, with more emphasis on CPU speed and memory.

3. I just want to dip in every now and again to see 'what's
going on' and use the computer for other things at other times. Can
I do that and what system spec do I need?

For me, the killer here is "use the computer for other things". For
example, if you start doing complex image processing, making
panoramas, complex spreadsheets etc., the CPU load that produces can
cause missing segments. If this doesn't matter, that's fine. The
500MHz PC below would to that, but I would suggest at least 256MB of
memory.

4. What is the most basic computer spec I can use to download
EUMETCast accepting considerable downgrading of the systems
possibilities?

If you don't mind missing very occasional segments, 500MHz Pentium
III with 256MB memory - data capture only. Use a separate
processing PC.


In short:

- if you want to do everything on a single PC, try to make sure it's
a good one (1-2GHz+, 512MB-1GB according to your aims) and expect
missing segments if you overload the single PC with other tasks. So
make it a dedicated MSG-1 PC if possible. Use Windows 2000 or XP.

- if you can find a 500MHz PC for separate receiver use, most of the
potential problems disappear, and you can do what the heck you like
on the Processing PC. Use Windows 2000 or XP.

There's nothing to stop you using the single PC solution to start
with, and migrating to two PCs as funds allow.

Does that answer the question?
Does anyone else agree?

Cheers,
David



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------------------------------
Robert Moore

tel and fax: 44 (0) 1352 714456


Re: newbie setting up for MSG

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

1. I want a system that acts like a Meteosat WEFAX system - to
be able to view a European or global sector every 1/2 hour in either
VIS or IR and animate it. Every 1/4 hour would be preferable but
one has to be realistic. Can I do that and what system spec would I
require - one or two computers?

One dedicated computer (but I don't recommend that) or two PCs
networked. Spec for processing (or single) PC: 1-2GHz+ processor,
512MB-1GB memory (1GB memory if you want to use the HRV or Meteosat-
5 visible channel). Fast hard disks with 2MB or 8MB buffers. See
below for second Receiver PC spec.

2. I want 24 hour full imaging and animation and want real-time
display of any channel I chose. Can I do that and what system spec
do I need - two computer I suspect?

Same answer as above, with more emphasis on CPU speed and memory.

3. I just want to dip in every now and again to see 'what's
going on' and use the computer for other things at other times. Can
I do that and what system spec do I need?

For me, the killer here is "use the computer for other things". For
example, if you start doing complex image processing, making
panoramas, complex spreadsheets etc., the CPU load that produces can
cause missing segments. If this doesn't matter, that's fine. The
500MHz PC below would to that, but I would suggest at least 256MB of
memory.

4. What is the most basic computer spec I can use to download
EUMETCast accepting considerable downgrading of the systems
possibilities?

If you don't mind missing very occasional segments, 500MHz Pentium
III with 256MB memory - data capture only. Use a separate
processing PC.


In short:

- if you want to do everything on a single PC, try to make sure it's
a good one (1-2GHz+, 512MB-1GB according to your aims) and expect
missing segments if you overload the single PC with other tasks. So
make it a dedicated MSG-1 PC if possible. Use Windows 2000 or XP.

- if you can find a 500MHz PC for separate receiver use, most of the
potential problems disappear, and you can do what the heck you like
on the Processing PC. Use Windows 2000 or XP.

There's nothing to stop you using the single PC solution to start
with, and migrating to two PCs as funds allow.

Does that answer the question?
Does anyone else agree?

Cheers,
David


Re: MSG Data Manager beta update ..

a_van_belle
 

--- In MSG-1@..., "David Taylor" <david-taylor@b...>
wrote:
.. which will work with mini-scans is now available. This is beta,
so be warned!

See: www.satsignal.net => Software, Beta versions.

Cheers,
David
Thanks very much for this update David.

From cycle 1200 up to now (2145) Eumetsat is still sending the
miniscan at 5 minutes interval.
MDM does handle correctly. But as you noticed, channel 6 (WV 7.3) is
not formatted correctly.

I managed to compose an animation from 104 images ch09 (IR 10.8)from
12:00 to 20:40.
Astonishing how smooth such a 5 minute interval animation runs.
A pity however that occasionally I do see the image "jumping" up and
the lower scan lines are a bit "out of sync".

Unfortunately at 47 Mb this AVI is too large to upload.

Still have to reprocess yesterdays data with 3 minute interval scans !

Greetings,
Arne van Belle


Re: newbie setting up for MSG

johnrigsec@...
 

In a message dated 07-12-03 14:29:20 GMT Standard Time,
david-taylor@... writes:

I believe that John Tellick prepared a list of various systems and
how successful they were. Did you publish that, John?

Cheers,
David
David,

You've blown my cover!

The trouble with old(er) age, is that either one slows down or the clock
speeds up.
Sitting here writing Christmas cards I find I keep writing 'whatever happened
to 2003?'
I'm sure I'm not alone.

Yes, I did ask users some months ago about what systems they were using for
MSG
EUMETCast reception. There was quite a good response - for which I'm very
grateful,
but that now has to be condensed into a meaningful form. Not so easy and
rather
time consuming and what will one learn anyway?

I have to admit that nothing has yet been prepared and is not likely to be
before the
New Year.
I thought it was a good idea at the time given the variation in users set-ups
and
with recent posts the 'debate' on 'what do I need?' continues and there seems
to be
not one definitive answer.

Apart from that computer specifications seem to get better by the month!

It seems to me to boil down to what do you want to do?
And, what do I need to do such and such.
Several are saying that you really need a stand alone MSG system - that is a
computer
not used for anything else.
But that depends on what one requires from 'MSG.'

Well, let me put the ball back in the experts court.

1. I want a system that acts like a Meteosat WEFAX system - to be able to
view a
European or global sector every 1/2 hour in either VIS or IR and
animate it.
Every 1/4 hour would be preferable but one has to be realistic.
Can I do that and what system spec would I require - one or two computers?

2. I want 24 hour full imaging and animation and want real-time display of
any channel
I chose.
Can I do that and what system spec do I need - two computer I suspect?

3. I just want to dip in every now and again to see 'what's going on' and
use the
computer for other things at other times.
Can I do that and what system spec do I need?

4. What is the most basic computer spec I can use to download EUMETCast
accepting considerable downgrading of the systems possibilities?

Both you, David and Arne have told me of having used quite a 'low spec'
computer
for reception which works OK but that will require a second 'better' computer
for
processing and display.

Could the current fastest and 'best specified' home computers do it all in
real-time -
reception, processing and display and animation all at the same time?

Regards,
John.


New file uploaded to MSG-1

MSG-1@...
 

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the MSG-1
group.

File : /MiniScanScreenShot.png
Uploaded by : gm8arv <david-taylor@...>
Description : MSG-1 mini-scan - sample screen shot from the MSG Data Manager showing the area covered by the mini-scan tests made during December 10-11 2003. Note that channel 6 (WV_073) is not delivering all its segments. This is not expected to be part of the "production" data set.

You can access this file at the URL

http://groups.yahoo.com/group/MSG-1/files/MiniScanScreenShot.png

To learn more about file sharing for your group, please visit

http://help.yahoo.com/help/us/groups/files

Regards,

gm8arv <david-taylor@...>


MSG Data Manager beta update ..

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

.. which will work with mini-scans is now available. This is beta,
so be warned!

See: www.satsignal.net => Software, Beta versions.

Cheers,
David


HRIT Channel 6 - WV_073

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

I don't seem to be getting Channel 6 - WV_073 - apart from a couple
of segment 1s from 0915 and 0945?

Cheers,
David


Re: Meteosat-5 problems?

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., johnrigsec@a... wrote:
All,

I have just downloaded a direct WEFAX image from Meteosat-5 -
20:06. The signal was very strong and steady and the WEFAX image
perfect.

So, at the moment that chain appears OK.
John, thanks for that confirmation. There appear to be a couple of
things that need attention on the MSG-1 relay: sometimes the
segments are out of order which means that an initially incomplete
image is saved, and sometimes the feed into the MSG-1 processor
seems to get stuck, and we get repeated lines in the northern part
of the scan when the image at Eumetsat is perfect.

Eumetsat are working on these issues. From what I can gather, users
of the MSG Data Manager are well ahead of others in being able to
access these images.

Cheers,
David
Web: http://www.satsignal.net


Re: MSG-1 manoeuvre.

Alan Sewards <alan.sewards@...>
 

Anything that causes a change in the velocity vector of the spacecraft will
have the effect of changing the orbit - that is how it is moved. You have to
cause the opposite change at the end of the manoevre to stop it continuing
to move (Newton!).

A nice method of changing attitude and doing gentle stationkeeping is
through the use of momentum wheels. The only problem with these is that the
bearings tend to pack up after some years in space, and they need the
momentum to be dumped from time to time through the use of the thrusters. I
suspect Hubble has momentum wheels as this gives gentle movement and no
thruster pollution possibilities.

Regards - Alan

----- Original Message -----
From: "Dave Martin" <Dave.Martin@...>
To: <MSG-1@...>
Sent: Tuesday, December 09, 2003 4:31 PM
Subject: [MSG-1] Re: MSG-1 manoeuvre.



If it's a spin-stabilized bird, and not 3-axis stabilised, I wonder if the
simplest way to change orbital slot E - W might be to leave it spinning
totally undisturbed and just change the orbital period by slightly
raising/lowering the satellite's orbit ?

Dave M

----- Original Message -----
From: Luca Bertagnolio
To: MSG-1@...
Sent: Tuesday, December 09, 2003 9:13 AM
Subject: [MSG-1] Re: MSG-1 manoeuvre.


Alan,

you're right, but my understanding of MSG-1 tells me that it is not a
three axis stabilized craft, but rather a spin stabilized spacecraft.

If I am correct, I am wondering what kind of wobble effect, or other
gyroscopic effect, will be observed during the thrusters firing
activity.

It seems strange to me though that they would risk any contamination
of the imager with the exhaust particles coming from the
thrusters... HST (a much more sophisticated imager, I admit) has a
big lens "cap" door which is/was closed during the Shuttle
maintenance missions.

In any case, keep those Tq software running during the maneuvre, it
could be fun!

Bye, Luca


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Re: data but no imagery....

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., Lawrence <lawrence@a...> wrote:
I trust that it is not just me that is seeing the data flow
without SEVIRI images? Yes, I read this morning's e-mail, but it is
puzzling to see the image files coming in now, but apparently empty.

Lawrence
Full images should be restored from the 16:45 repeat cycle onwards.

I do have a beta of the MSG Data Manager which will handle the mini-
scans on channels 1 to 11, but as this is not a production mode I am
not giving it any priority. If anyone wants the beta please let me
know.

Cheers
David


data but no imagery....

Lawrence <lawrence@...>
 

I trust that it is not just me that is seeing the data flow without
SEVIRI images? Yes, I read this morning's e-mail, but it is puzzling to
see the image files coming in now, but apparently empty.

Lawrence


Re: MSG-1 manoeuvre.

Alan Sewards <alan.sewards@...>
 

Guys,
I did NOT say that MSG1 was 3 axis stabilized, but that it had thrusters
which were capable of producing thrust in the three axes which are used for
attitude control and stationkeeping.

Try the following link:
http://www.eumetsat.de/en/index.html?area=left7.html&body=/en/dps/dissemination.html&a=710&b=1&c=700&d=700&e=0

The following is an excerpt from the link's target:


Satellite Propulsion

The MSG propulsion system inherits the unified bi-propellant system
already proven on communication satellites and some scientific missions. It
includes:

a.. 4 propellant tanks providing a large storage capacity (up to 965
kg of propellant)
b.. 2 helium pressurant tanks
c.. 2 liquid fuelled apogee motors each giving 400 N thrust for
apogee manoeuvres in transfer/drift orbits
d.. 6 reaction-control thrusters for fine orbital manoeuvres,
attitude acquisition and maintenance
Satellite Attitude and Orbit Control System AOCS

The MSG AOCS is designed on a minimum-complexity basis. It takes full
advantage of the Meteosat experience, and the fact that the spinner concept
provides gyroscopic stability. The onboard real time operations provide:

a.. attitude sensor processing and spin rate determination
b.. attitude and orbit manoeuvre synchronization
c.. active nutation damping.
The sensors comprise Sun slit sensors, Earth horizon crossing sensors,
and accelerometers.



I hope that clears it up!

Best regards - Alan

----- Original Message -----
From: <johnrigsec@...>
To: <MSG-1@...>
Sent: Tuesday, December 09, 2003 3:35 PM
Subject: Re: [MSG-1] Re: MSG-1 manoeuvre.


In a message dated 09-12-03 09:14:53 GMT Standard Time,
lucaberta@...
writes:

you're right, but my understanding of MSG-1 tells me that it is not a
three axis stabilized craft, but rather a spin stabilized spacecraft.
Hi Luca,

Yes, you are correct MSG-1 - indeed all the Meteosat craft are spin
stabilised.
Unlike the newer GOES which are three axis stabilised.

I am awaiting more information and confirmations from EUMETSAT on the
drift.

Regards,
John Tellick.






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Re: MSG-1 manoeuvre.

Dave Martin <Dave.Martin@...>
 

If it's a spin-stabilized bird, and not 3-axis stabilised, I wonder if the
simplest way to change orbital slot E - W might be to leave it spinning
totally undisturbed and just change the orbital period by slightly
raising/lowering the satellite's orbit ?

Dave M

----- Original Message -----
From: Luca Bertagnolio
To: MSG-1@...
Sent: Tuesday, December 09, 2003 9:13 AM
Subject: [MSG-1] Re: MSG-1 manoeuvre.


Alan,

you're right, but my understanding of MSG-1 tells me that it is not a
three axis stabilized craft, but rather a spin stabilized spacecraft.

If I am correct, I am wondering what kind of wobble effect, or other
gyroscopic effect, will be observed during the thrusters firing
activity.

It seems strange to me though that they would risk any contamination
of the imager with the exhaust particles coming from the
thrusters... HST (a much more sophisticated imager, I admit) has a
big lens "cap" door which is/was closed during the Shuttle
maintenance missions.

In any case, keep those Tq software running during the maneuvre, it
could be fun!

Bye, Luca


************************************************************************
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Meteosat-5 problems?

johnrigsec@...
 

All,

I have just downloaded a direct WEFAX image from Meteosat-5 - 20:06.
The signal was very strong and steady and the WEFAX image perfect.

So, at the moment that chain appears OK.

The Arabian sea looks very warm and there appears to be a cyclone off
Sumatra.

Regards,
John Tellick.
RIG.