Date   

Re: MSG-1 manoeuvre.

johnrigsec@...
 

In a message dated 09-12-03 16:02:51 GMT Standard Time, Dave.Martin@...
writes:

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,

That is my understanding of how the drift occurs - boost it to a higher orbit
- it goes one
way, boost it to a lower orbit it drifts in the other direction - in relation
to the Earth.

I believe that is how the Shuttle and ISS 'catch up' with one another.

Regards,
John Tellick.


Missing segments

Peter Benney <tugboat@...>
 

As a result of "Lost Messages" I have had a few missing segments each day on the 0115 or 0145 cycles. The XP Home event log shows the following Security Success Audit at the relevant time. Any ideas ?...

Source: Security
Category: Logon/Logoff
Type: Success A
Event ID: 528
User: NT Authority/Network Service
Computer: Advent (Rx PC))

Description.
Successful Logon:
User Name: NETWORK SERVICE
Domain: NT AUTHORITY
Logon ID: (0x0 0x3E4)
Logon Type: 5
Logon Process: Advapi
Authentification Package: Negotiate
Workstation:Logon GUID: (00000000-0000-0000-000000000000)

Rx PC
AMD Athlon XP 2400+ (2.0GHz)
Motherboard: L7VTM VIA KT400
Memory: 1024MB DDR RAM - PC2100
Network Card: RealTek 8100L (onboard - RTL8139)
Windows XP Home Edition
Version 5.1.2600 Service Pack 1 Build 2600
BIOS Version/Date Phoenix Technologies, LTD 6.00 PG, 11/09/2002 (Latest)

Technisat Sky2PC USB box.
Software:
Technisat V4.2.8
Tellique V2.3.1

Regards,

Peter Benney


Re: MSG-1 manoeuvre.

johnrigsec@...
 

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.


Re: MSG-1 manoeuvre.

johnrigsec@...
 

In a message dated 08-12-03 18:36:43 GMT Standard Time,
david-taylor@... writes:

John,

Many thanks for that information - you are the first source, as ever!

One question: the imager will be kept running, so does that mean
that the axis of the satellite remains parallel with the earth's
axis? Does that mean there are separate 3D stabilsed small
thrusters which can perform this operation, without having to use
the main on-axis engine?
David,

Very valid points and I don't know the answer - "but I know a man that does!"
I will get confirmation and further info.

I'm showing my ignorance here, I realise!<
Not at all David - you are held in the highest esteem!

Regards,
John.


Re: MSG-1 manoeuvre.

Luca Bertagnolio <lucaberta@...>
 

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

--- In MSG-1@..., "Alan Sewards" <alan.sewards@c...>
wrote:
David,
All modern satellites have three axis small thrusters for
attitude
control. These are used for stationkeeping also. The satellite will
have to
be reoriented when it arrives at its destination so it is just as
efficient
to do it little by little on the way there.


Re: MSG-1 manoeuvre.

Alan Sewards <alan.sewards@...>
 

David,
All modern satellites have three axis small thrusters for attitude
control. These are used for stationkeeping also. The satellite will have to
be reoriented when it arrives at its destination so it is just as efficient
to do it little by little on the way there.

Regards - Alan

----- Original Message -----
From: "David Taylor" <david-taylor@...>
To: <MSG-1@...>
Sent: Monday, December 08, 2003 7:16 PM
Subject: [MSG-1] Re: MSG-1 manoeuvre.


I had reported some time ago that MSG-1 would be drifted from its
present commissioning position of 10 deg. W to 3 deg. W (its
operational position) by late 2003 in preparation for the start of
operational '0 deg. longitude services' (replacing Meteosat-7's
operational service) in early January.
It would then be renamed Meteosat-8.

I have just been informed by EUMETSAT that the drift is now likely
to be the second week of January 2004.
I understand imaging will continue whilst the satellite is drifted.
John,

Many thanks for that information - you are the first source, as ever!

One question: the imager will be kept running, so does that mean
that the axis of the satellite remains parallel with the earth's
axis? Does that mean there are separate 3D stabilsed small
thrusters which can perform this operation, without having to use
the main on-axis engine?

I'm showing my ignorance here, I realise!

Cheers,
David



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Re: MSG-1 manoeuvre.

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

I had reported some time ago that MSG-1 would be drifted from its
present commissioning position of 10 deg. W to 3 deg. W (its
operational position) by late 2003 in preparation for the start of
operational '0 deg. longitude services' (replacing Meteosat-7's
operational service) in early January.
It would then be renamed Meteosat-8.

I have just been informed by EUMETSAT that the drift is now likely
to be the second week of January 2004.
I understand imaging will continue whilst the satellite is drifted.
John,

Many thanks for that information - you are the first source, as ever!

One question: the imager will be kept running, so does that mean
that the axis of the satellite remains parallel with the earth's
axis? Does that mean there are separate 3D stabilsed small
thrusters which can perform this operation, without having to use
the main on-axis engine?

I'm showing my ignorance here, I realise!

Cheers,
David


MSG-1 manoeuvre.

johnrigsec@...
 

All,

I had reported some time ago that MSG-1 would be drifted from its present
commissioning position of 10 deg. W to 3 deg. W (its operational position) by
late 2003 in preparation for the start of operational '0 deg. longitude services'
(replacing Meteosat-7's operational service) in early January.
It would then be renamed Meteosat-8.

I have just been informed by EUMETSAT that the drift is now likely to be the
second week of January 2004.
I understand imaging will continue whilst the satellite is drifted.

Registered EUMETCast users will be notified of developments.

Meteosat-7 will remain at 0 deg. longitude and continue WEFAX/HRI direct
dissemination till the end of 2005.

Regards,
John Tellick.


Meteosat-5 - visible channel errors

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Once again, I am seeing errors in the Meteosat-5 visible channel at
0900 today. It seems as if the acquisition stopped only a short way
into the scan (starting at the south), leaving most of the image
northwards as a repetition of the last good line.

However, checking the Dundee image archive the data seems to be
fine. As far as I can tell, Dundee doesn't receive the Met-5 data
directly, so I am puzzled as to why there should be this
discrepancy. If Dundee can get good data, why can't the MSG feed?

It seems a pity, as the images are superb, when complete!

Cheers,
David


Re: newbie setting up for MSG

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

thanks for the replys saved me from spending money on hyper
threading P4 i will now purchase a normal one.
regards Peter
I recently upgraded, and actually bought a 2.8GHz hyper-threading
chip. I didn't realise it wasn't compatible (in HT mode) until I re-
read the Tellique instructions. However, I got it for the 800MHz
FSB, as I thought that would give a speed advantage over the 533MHz
FSB on the other processors. Yes, I did get the 400MHz DDR memory
to go with it. It is very fast!

(It runs my backup MSG-1 receiver with the Tellique software and the
MSG Data Manager, and is also used as a general purpose PC. When
CPU-intensive operations are run, missing segments result......).

Cheers,
David


Re: newbie setting up for MSG

peterszoo2003 <peter@...>
 

--- In MSG-1@..., "peterszoo2003" <peter@z...> wrote:
I am setting up for msg reception
I want to use a 1 computer setup I would like to know if a P4 3.06
GIG hyper threading processor is suitable will it work better than
the standard P4 northward 533 or do I realy nead a 2 computer
network
setup.
regards Peter
thanks for the replys saved me from spending money on hyper
threading P4 i will now purchase a normal one.
regards Peter


Re: newbie setting up for MSG

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., "peterszoo2003" <peter@z...> wrote:
I am setting up for msg reception
Peter,

An obvious tip - search or scroll back through the messages to this
group as this has been discussed many times.

http://groups.yahoo.com/group/MSG-1/

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

Cheers,
David


Re: newbie setting up for MSG

Peter Benney <tugboat@...>
 

If you have the newer DVB card (V2.6B), be aware that the older
V4.2.2 drivers are the recommended ones, and not the newer V4.2.8
drivers supplied with the card.

Peter,

Further to David's good advice the FAQ refers to software V4.2.8 which I am running with the USB box but I thought I should draw your attention to this requirement.

Peter B


Re: newbie setting up for MSG

Peter Benney <tugboat@...>
 

I am setting up for msg reception
I want to use a 1 computer setup I would like to know if a P4 3.06
GIG hyper threading processor is suitable will it work better than
the standard P4 northward 533 or do I realy nead a 2 computer network
setup.
Peter,

Just a warning in the Technisat Skystar2 FAQ you will find the following...

!!! the software is not designed to operate on SMP or Hyper-Threading CPU systems.

scroll down to page 4 for more infor.

http://www.t-data.lu/software/Sky2FAQ.pdf

Cheers,

Peter Benney


Re: newbie setting up for MSG

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., "peterszoo2003" <peter@z...> wrote:
I am setting up for msg reception
I want to use a 1 computer setup I would like to know if a P4 3.06
GIG hyper threading processor is suitable will it work better than
the standard P4 northward 533 or do I realy nead a 2 computer
network setup.

Peter,

My recommendation is for a two-PC setup. You can leave the RX PC on
all the time, running independantly of the rest of your system, in
addition, the RX PC does not have to store large amounts of data and
therefore disk folder and data fragmentation will be less of an
issue. For some time, I ran a 550MHz Pentium III for this task
quite successfully.

Many folk here have also reported success with a single-PC system.
You need to choose components carefully for such a system - fast
disk I/O, minimum IRQ sharing etc. Note that the Tellique software
does not support hyper-threading so turn that off in the BIOS. 1GB
of RAM is highly desirable for processing the larger images (MSG-1
HRV, Meteosat-5 visible).

On the single-PC system, what you need to avoid, should minimising
missing segments be important to you, is anything that uses a large
amount of CPU - making panoramas, processing large images, running
disk defrag at normal priority etc. etc. In other words, if you use
your "standard" PC for all and sundry tasks, and add DVB reception
and processing as well, be prepared for less than perfect results.
It's a good way to start, though.

If you have the newer DVB card (V2.6B), be aware that the older
V4.2.2 drivers are the recommended ones, and not the newer V4.2.8
drivers supplied with the card.

Cheers,
David


Re: newbie setting up for MSG

Alan Sewards <alan.sewards@...>
 

Peter,
I use a single Athlon 2400+ XP computer for reception (SkyStar 2 card),
decoding (MSG Data Manager), and Animation (MSG Animator) and everything
works very well. No missing segments. I collect HRIT channels 1, 2 , 3. 4,
6, 9 ,12, all LRIT and all FSD plus MPEF CLAI and CTH images. I don't think
you will have any problems from the viewpoint of power, but some people do
have mysterious difficulties, notably with missing segments, which are
currently inexplicable. I urge the use of 1 GB RAM though, and a fast disk
kept solely for MSG data.

Lots of luck!

Best regards - Alan

----- Original Message -----
From: "peterszoo2003" <peter@...>
To: <MSG-1@...>
Sent: Sunday, December 07, 2003 1:45 PM
Subject: [MSG-1] newbie setting up for MSG


I am setting up for msg reception
I want to use a 1 computer setup I would like to know if a P4 3.06
GIG hyper threading processor is suitable will it work better than
the standard P4 northward 533 or do I realy nead a 2 computer network
setup.
regards Peter




To unsubscribe from this group, send an email to:
MSG-1-unsubscribe@...



Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/




newbie setting up for MSG

peterszoo2003 <peter@...>
 

I am setting up for msg reception
I want to use a 1 computer setup I would like to know if a P4 3.06
GIG hyper threading processor is suitable will it work better than
the standard P4 northward 533 or do I realy nead a 2 computer network
setup.
regards Peter


today's images

Robert Moore
 

Maybe everyone else started earlier than me this morning - but have you all
looked at the HRV image of Mt Etna? The slopes of the volcano/mountain are
clear to see, and the snow on top.
Robert




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


tel and fax: 44 (0) 1352 714456


Re: Possible explanation for strange event

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

The interesting factor was the invisible running of MSG-1.
Lawrence,

The next version of the program will warn you if you try and run two
copies, although it will not prevent you from doing so.

Cheers,
David


Re: Possible explanation for strange event

Lawrence <lawrence@...>
 

Running two file eaters is not recommended! Maybe I need to code
against this?

Do you think this may have been the cause of your problems in the
past?

Cheers,
The interesting factor was the invisible running of MSG-1. I have seen
this before with another program that would not 'reload'. On that
occasion the program was not shown as active in Task manager, although
it identified that another version was running, so a computer restart
was needed to clear the memory. Although all is back to normal now, I
still get missing segments. I am ready to spend time following this
through, but I have to clear the Christmas article deadlines first, and
shake off this bad cold!

best to all.

Lawrence