Date   

Missing segments - August 25 and 26

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Is it just me, or did everyone miss some complete HRIT scans on
those two days:

Aug 25
Scan: 1500 2100

Aug 26
Scan: 0300 0900 1500

Seems to be something awfully systematic in those numbers! By the
way you can get a report by selecting Tools, Missing segments report
with the MSG Data Manager.

Cheers,
David


MSG-1 and MET7 thoughts

Luca Bertagnolio <lucaberta@...>
 

Hi,

I was just wondering, since the direct downlink of the data from MSG-
1 will not be possible, what would prevent Eumetsat from positioning
MSG-1 close by 0 degrees, let's say 0.5E, and run the operational
service from that position?

Doing that would enable a longer transition from the analog MET7
broadcasts, which are received by a very large number of stations,
keeping MET7 at 0 degrees, while MET8 would already be operational
with almost the same coverage.

Of course I am only talking about technical matters, not taking into
consideration agreements for orbital slots and things like this.

Does anyone know how the transition from analog WEFAX to the new
format is handled? I would not be surprised to see quite a few
protests when MET7 will start to drift towards 10W...

Bye, Luca


Re: Eclipse periods

Douglas Deans <douglas@...>
 

----- Original Message -----
From: "David Taylor" <david-taylor@...>
To: <MSG-1@...>
Sent: Monday, August 25, 2003 8:37 AM
Subject: [MSG-1] Eclipse periods


Will MSG-1 have eclipse periods like other geostationary satellites,
when there is not enough power to keep the electronics fully
running? I am presuming so, but have seen no announcement as yet.
I also asusme that at some point there will be periods where the
imager will be switched off to avoid looking at the sun.

I see this will start soon on GOES and Meteosat 7.

Cheers,
David
Interesting point, David. There is nothing specific in any of the technical
documents (Particularly 07 and 08). MSG's power demand (600W) is 3 times
that of its predecessors but still has an increased life span of 7 years.
There is a reference to on-board batteries for eclipse purposes but I would
think that it is to ensure power for its own housekeeping etc. Having said
that there is no input/output dissemination now so the power requirements
must be less.
Will be interesting to see what happens.

Douglas.


Eclipse periods

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Will MSG-1 have eclipse periods like other geostationary satellites,
when there is not enough power to keep the electronics fully
running? I am presuming so, but have seen no announcement as yet.
I also asusme that at some point there will be periods where the
imager will be switched off to avoid looking at the sun.

I see this will start soon on GOES and Meteosat 7.

Cheers,
David


Re: retention of settings

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., Lawrence <lawrence@a...> wrote:
I notice that after closing down MSG DM, settings such as histogram
equalise are not retained. I suspect that I tend to use the same
settings for most channels - could we save these at close down?

regards

Lawrence
This is off-topic - please take this to the SatSignal group.

Thanks,
David


Re: channel-4

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@..., Lawrence <lawrence@a...> wrote:
I am finding that when channel-4 (infra-red) is dropped into GSS-
4, it
is being interpreted as a visible channel. My settings out
somewhere?

Lawrence
This is off-topic - please take this to the SatSignal group.

Thanks,
David


retention of settings

Lawrence <lawrence@...>
 

I notice that after closing down MSG DM, settings such as histogram
equalise are not retained. I suspect that I tend to use the same
settings for most channels - could we save these at close down?

regards

Lawrence


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 : /200308200815-msg-ch12nFC.jpg
Uploaded by : johnbwillisuk <john@...>
Description : Eastern Europe taken on a rare occaision when Eumetsat transmitted the eastern segment. Captured with MGM and processed on GSS4. 1.3MB.

You can access this file at the URL

http://groups.yahoo.com/group/MSG-1/files/200308200815-msg-ch12nFC.jpg

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

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

Regards,

johnbwillisuk <john@...>


channel-4

Lawrence <lawrence@...>
 

I am finding that when channel-4 (infra-red) is dropped into GSS-4, it
is being interpreted as a visible channel. My settings out somewhere?

Lawrence


Re: HRV segment positions - discussion topic

Douglas Deans <douglas@...>
 

----- Original Message -----
From: "David Taylor" <david-taylor@...>
To: <MSG-1@...>
Sent: Friday, August 22, 2003 10:56 AM
Subject: [MSG-1] HRV segment positions - discussion topic


Given the ability of the HRV scanner to look at two different
windows during its scan - with separate east-west starting points
for the upper and lower segments - how would you like to see the
scan managed?

- tracking the sun
- fixed on zero degrees longitude
- fixed on Europe and Africa
- any other ideas?

David
I certainly think Europe is priority No.1. Low sun (early and late) is
excellent for cloud topography etc. so a 6 hour bit in the middle of the day
really is not good enough. One difficulty is the judgement of how the
northern hemisphere will look (in visible) during the winter months although
the appearance of the southern hemisphere over our summer has given some
clues.
Permanent Europe with the lower segment following the sun ? That would
ensure visible images for tropical cyclones in the Madagascar area and of
course the formation of tropical depressions/storms/hurricanes in the
Atlantic.

Douglas.


Re: HRV segment positions - discussion topic

Guy Martin <agm@...>
 

Can we have a (sensible) choice

Guy

----- Original Message -----
From: David Taylor
To: MSG-1@...
Sent: Friday, August 22, 2003 10:56 AM
Subject: [MSG-1] HRV segment positions - discussion topic


Given the ability of the HRV scanner to look at two different
windows during its scan - with separate east-west starting points
for the upper and lower segments - how would you like to see the
scan managed?

- tracking the sun
- fixed on zero degrees longitude
- fixed on Europe and Africa
- any other ideas?

David


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HRV segment positions - discussion topic

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Given the ability of the HRV scanner to look at two different
windows during its scan - with separate east-west starting points
for the upper and lower segments - how would you like to see the
scan managed?

- tracking the sun
- fixed on zero degrees longitude
- fixed on Europe and Africa
- any other ideas?

David


Re: New group - and some questions

Luca Bertagnolio <lucaberta@...>
 

Lawrence,

I would try to see if a 1.8m dish would be enough to receive MSG-1 in C-band from Atlantic Bird, if I were you. Just pure curiosity, as I think that the data is an exact bit dump of the HotBird data.

Actually, I am quite convinced that the Fucino uplink station in Italy receives HotBird, dissects the DVB data and then feeds it up to Atlantic Bird, as simple as that. No need to get into the weeds of the DVB payload, just copy bits!

Bye, Luca

--- In MSG-1@..., Lawrence <lawrence@a...> wrote:
I set up a PDUS system and operated it until we moved to Southampton. I
am only now beginning to dismantle the 1.8m dish because I cannot now
see it being used.


Re: New group - and some questions

Lawrence <lawrence@...>
 

On Fri, 22 Aug 2003 08:49:01 -0000, you wrote:

Lawrence,

My history with MSG-1 doesn't go back far enough! At the time when
MSG-1 was being planned, were there even any satellites providing
any digital transmissions for domestic users? It was all analog
until quite recently wasn't it? So no cheap Technisat cards! We
should all thank that power amplifier that failed!

Cheers,
David
Essentially, the NOAA polar orbiters provide digital (h.r.p.t.)
telemetry even if (as must be the case) the original optical image is
sampled digitally for coding and transmission. I would think of PDUS as
being all but digital - I think that it is a matter of different
definitions. MSG-1 is simply an 'all-digital' satellite as compared to
Meteosat-7 and earlier sats being a mixture.

I set up a PDUS system and operated it until we moved to Southampton. I
am only now beginning to dismantle the 1.8m dish because I cannot now
see it being used.

regards

Lawrence


Re: New group - and some question

Luca Bertagnolio <lucaberta@...>
 

David,

true enough, for us lucky ones that live in the footprint of Hotbird. I have good result with a 40cm dish (when it's not windy or rainy!)

The C-band setup is definitely much more expensive that the Ku-band one. But again, since most stations are here in Europe, that's a good way to feed the data.

Regarding future DVB data streams, I have no doubts it's going to be like this for a long long while, there will be enough bitching about changing the dish from the old Met7 to the new setup, and by the time we will get the new MSG birds maybe everything will be on the Internet...

Bye, Luca

--- In MSG-1@..., "David Taylor" <david-taylor@b...> wrote:
My history with MSG-1 doesn't go back far enough! At the time when
MSG-1 was being planned, were there even any satellites providing
any digital transmissions for domestic users? It was all analog
until quite recently wasn't it? So no cheap Technisat cards! We
should all thank that power amplifier that failed!


Re: New group - and some question

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

It is interesting to wonder why the DVB HotBird transmission was
not originally planned. I suppose that the idea of doing it this
way was not even thought about, yet the cost implications for the
user are the difference between receiving it and not receiving it.
Not to mention trying to install a huge dish for HRIT.

We may never know.
Lawrence,

My history with MSG-1 doesn't go back far enough! At the time when
MSG-1 was being planned, were there even any satellites providing
any digital transmissions for domestic users? It was all analog
until quite recently wasn't it? So no cheap Technisat cards! We
should all thank that power amplifier that failed!

Cheers,
David


Re: New group - and some question

Lawrence <lawrence@...>
 

On Fri, 22 Aug 2003 08:29:16 -0000, you wrote:


Ulli,
snip
software before you can get to those files. I get the impression,
though, that the present dissemination via Hotbird and soon the C-
band satellite has made things a little easier for Eumetsat, and a
lot cheaper for the users, so likely the DVB dissemination will
remain. That's my reading of the situation.

Cheers,
David
Hello David and Ulli

It is interesting to wonder why the DVB HotBird transmission was not
originally planned. I suppose that the idea of doing it this way was
not even thought about, yet the cost implications for the user are the
difference between receiving it and not receiving it. Not to mention
trying to install a huge dish for HRIT.

We may never know.

Lawrence


Re: New group - and some question

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

From the MSG official site, I understand that it was originally
intended to use
the new bird itself for the propagation of the data now sent from
hotbird. Is
that right? Would it have been the same format?
Will there be a redistribution from a future Meteosat like in the
past (of
course with the new data format)?
Ulli,

Yes, at some point in the future MSG-2 and MSG-3 (I already feel off-
topic!) will disseminate directly, and the file format will be the
same, but it will require different hardware and receiver processing
software before you can get to those files. I get the impression,
though, that the present dissemination via Hotbird and soon the C-
band satellite has made things a little easier for Eumetsat, and a
lot cheaper for the users, so likely the DVB dissemination will
remain. That's my reading of the situation.

Cheers,
David


Re: New group - and some question

Ulrich G. Kliegis <Ulrich.Kliegis@...>
 

On 22 Aug 2003 at 8:38, Douglas Deans wrote:

Good idea for non DJT software related topics.
Wish it success.

Douglas.
Hi crowd ;)

Me too :) It seems I was the first to enlist this morning. Wow. My MSG
frontend is in the make.

From the MSG official site, I understand that it was originally intended to use
the new bird itself for the propagation of the data now sent from hotbird. Is
that right? Would it have been the same format?
Will there be a redistribution from a future Meteosat like in the past (of
course with the new data format)?

Regards,

Ulli (who started listening to the APT chirp of Meteosat 2 or 3, won't
remember right now...)


Re: New group

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Hardware is better discussed on Timestep-L, so is this group just
for
Tellique ??

Confused, but enthusiastic !

Dave
Dave,

The current remit of the group is ..

-----------------------------
For users of the Eumetsat MSG-1 weather satellite. The group's aim
is to provide a dedicated area for sharing information about the
hardware and software for receiving MSG-1 data, the satellite and
its facilities, and topics relating to the current trials. Related
groups include rig-l for general remote imaging topics and SatSignal
for users of David Taylor's weather satellite software, and topics
which are more appropriate for those groups are inappropriate here.
-----------------------------

.. and is open for discussion.

As some people are using hardware other than Timestep's, there is no
need to clutter your group with off-topic issues. I would guess
that Tellique software and payment methods might be one area but
there's much more...

- how the HRV scan is operated
- perhaps we could post the News and Regular Report messages for
those who don't yet have operational systems (copyright issues?)
- missing segment "contests"
- multi-spectral processing techniques with all those channels
available
- sample results
- required dish sizes

I would prefer to keep specific discussion of my software on the
SatSignal group, though, and general remote imaging topics on the
rig-l group. I guess there may be overlapping areas so we'll just
see what everyone wants!

Cheers,
David