Date   

Re: MSG-1 Dish alignment and wind

a_van_belle
 

Hello Robert and Hugh,

Finding the right spot to mount your dish is not easy.
But with some simple re-inforcements you can stiffen the existing
mount. Placing a rod "triangling" the existing mount will help a lot
and does not put in much weight.
You could also try to use a pre-tensioned steelwire from a fixed
point to the pole just below the dish mounting to dampen.
Don't think that a mesh dish is a solution here. At this high
frequency the mesh should be minimum 2mm and won't be very open when
hit by a gale.
You could try a bit smaller dish, this has less surface and a wider
beamwidth, relaxing a bit on the stiffnes of the mount.

Greetings,
Arne van Belle


Re: Solar outage

Ian S Deans <ian@...>
 

David, my report is exactly the same as yours for the channels I am taking .
Not taking LRIT and HRIT channels that I am presently taking are 1,2,3,4,6,9
and 12.
I was speaking to Douglas on the 'phone this afternoon and he had exactly
the same segment loss on the 5 HRIT channels he takes ( 2,4,6,9,12 )

David did you see segment 7 missing from channel 3 on the 13.45 UTC cycle.

Hope that helps

Regards
Ian


Re: Solar outage

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@yahoogroups.com, "Alan Sewards" <alan.sewards@c...>
wrote:
I had this exactly as well.

Best regards - Alan
Thanks, Arne and Alan.

David


Re: What does the future hold....

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

This conclusion is reached from the viewpoint of the
communications, but there are also commercial aspects to be
considered. From the Eumetsat viewpoint, HR data is probably more
valuable than LR data, and users may be prepared to pay more for it -
if this is believed to be the case, the distinction between HR and
LR data may be continued, even though the original technical reason
for the difference has vanished.

.. and for people taking data over the Internet, bandwidth will
still be a major consideration! Don't forget that LRIT data is
supposed to be available that way, although it's gone quiet on that
front.

Will MSG-2 have an SSPA allotted to the job of data dissemination?
Will the SSPA be omitted or used as a backup for the really
important jobs of satellite control, telemetry and sensor downlinks?
Is the TV satellite dissemination approach the next generation, or
will it be quietly dropped after MSG-1 as it potentially upsets the
charging basis for the data?

.. my guess? They will carry on with the DVB approach, assuming it
is proved to be sucessful, and the current problems can be ironed
out. I suspect the latter is just learning how to make the most of
a new system. Once the eTokens are in place, data access and
charging can be just the same as the existing (direct from Meteosat
7) system. It will be interesting to see if the Americans and
Japanese follow suit. John Tellick has spoken about this at the
recent meetings, so I guess he will have some input!

Cheers,
David


Re: Solar outage

Alan Sewards <alan.sewards@...>
 

I had this exactly as well.

Best regards - Alan

----- Original Message -----
From: "David Taylor" <david-taylor@blueyonder.co.uk>
To: <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 8:18 PM
Subject: [MSG-1] Re: Solar outage


--- In MSG-1@yahoogroups.com, "Ian S Deans" <ian@i...> wrote:
Wish you hadn't said that !!! Major sector loss 12.30 and 12.45
UTC although up to then weekend had been excellent.

Ian
Ian, did you get anything similar to the report below? Please list
the channels you are taking.

Thanks,
David
-------------------------------

Cycle: 1230
msg-ch01, seg: 4 5 6 7 8
msg-ch02, seg: 4 5 6 7 8
msg-ch03, seg: 4 5 6 7 8
msg-ch04, seg: 4 5 6 7 8
msg-ch05, seg: 4 5 6 7 8
msg-ch06, seg: 4 5 6 7 8
msg-ch07, seg: 4 5 6 7 8
msg-ch08, seg: 4 5 6 7 8
msg-ch09, seg: 4 5 6 7 8
msg-ch10, seg: 4 5 6 7 8
msg-ch11, seg: 4 5 6 7 8
msg-ch12, seg: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Cycle: 1245
msg-ch01, seg: 8
msg-ch02, seg: 8
msg-ch03, seg: 8
msg-ch04, seg: 8
msg-ch05, seg: 8
msg-ch06, seg: 8
msg-ch07, seg: 8
msg-ch08, seg: 8
msg-ch09, seg: 8
msg-ch10, seg: 8
msg-ch11, seg: 8
msg-ch12, seg: 20 21 22 23 24
lrit-ch01, seg: 8
lrit-ch03, seg: 8
lrit-ch04, seg: 8
lrit-ch05, seg: 8
lrit-ch09, seg: 8




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



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




Re: Solar outage

a_van_belle
 

David and Ian,

I have the same missing segments and they did not coincidence with a
solar outage on this side !

But at around 12:37UTC there was a solar outage predicted for the
downlink from MSG-1 to Darmstadt !
But this is not the peak outage, this was on Oktober 10 12:38 UTC.

So I guess this was not caused by solar outages but by the ongoing
commissioning.

Greetings,
Arne van Belle


Re: Solar outage

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@yahoogroups.com, "Ian S Deans" <ian@i...> wrote:
Wish you hadn't said that !!! Major sector loss 12.30 and 12.45
UTC although up to then weekend had been excellent.

Ian
Ian, did you get anything similar to the report below? Please list
the channels you are taking.

Thanks,
David
-------------------------------

Cycle: 1230
msg-ch01, seg: 4 5 6 7 8
msg-ch02, seg: 4 5 6 7 8
msg-ch03, seg: 4 5 6 7 8
msg-ch04, seg: 4 5 6 7 8
msg-ch05, seg: 4 5 6 7 8
msg-ch06, seg: 4 5 6 7 8
msg-ch07, seg: 4 5 6 7 8
msg-ch08, seg: 4 5 6 7 8
msg-ch09, seg: 4 5 6 7 8
msg-ch10, seg: 4 5 6 7 8
msg-ch11, seg: 4 5 6 7 8
msg-ch12, seg: 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
Cycle: 1245
msg-ch01, seg: 8
msg-ch02, seg: 8
msg-ch03, seg: 8
msg-ch04, seg: 8
msg-ch05, seg: 8
msg-ch06, seg: 8
msg-ch07, seg: 8
msg-ch08, seg: 8
msg-ch09, seg: 8
msg-ch10, seg: 8
msg-ch11, seg: 8
msg-ch12, seg: 20 21 22 23 24
lrit-ch01, seg: 8
lrit-ch03, seg: 8
lrit-ch04, seg: 8
lrit-ch05, seg: 8
lrit-ch09, seg: 8


Re: MSG-1 Dish alignment and wind

Hugh Marnoch
 

The extra rod will give you much more rigidity and should cure any problem you have with dish movement 'if' the pole is moving in the wind enough to lose the signal. One of the satellite dish makers used to do a fitting just like that using a 60cm length of right angled steel with a simple bent plate bracket for the wall end, one hole for the wall bolt and one for a coupling nut and bolt. The other end of the rod bolted on to the dish end of the mounting arm, simple but very effective.

Hugh.

*********** REPLY SEPARATOR ***********

On 12/10/2003 at 17:55 Robert Moore wrote:

I have real problems because my dish is mounted in the only place on my
house
where I can see MSG-1. I am going to fix a mild steel rod from the mounting
pole to the wall some way from the bracket so that I have a strong
triangle.
Today I have tried to damp the oscillation of the dish on the pole by
placing a
light rubber rope around the bottom of the dish and the bracket, there is
hardly any tension on this but I hope it will stop pole and dish
oscillating in
sync and thus amplifying small movements. I'll have to see - when the wind
blows.
My unavoidable dish-exposure is slightly compensated for by the fact that
I am
exposed from west through north to east, whereas the prevailing winds are
from
the south west - even a SW gale leaves my garden calm, though the clouds
race
overhead.
SO I'm hoping that with some damping and far fewer NW winds I will not
suffer
too much loss over the year. Those of us with similar problems can keep one
another posted through the list.
Robert.

Quoting Arne van Belle <a.van.belle@hccnet.nl>:

David wrote:
Interestingly, during wind and rain, when I have missed segments,
the indicators have not dropped anything like that low, suggesting
perhaps that the indicators average over too long a period to show
problems, and that momentary drops due to wind (moving the dish) may
be quite important.

My findings:
The Signal Quality readout is a 1-second average value that does not
detect
short signal drops.
As the name implies it does not show signal level but the quality of the
received signal !
When I put an additional line-amplifier in, the readout remains the same
and during a solar outage the readout dropped where as my Satellite
signal
meter showed and increase.

I did some calculations based on receiving Hotbird with an 88 cm dish.
This dish has a "half power" beam-width of only 2 degrees at 11096 MHz.
So
if the dish moves in windy conditions, a deflection of 1 degree left and
1
degree right (same applies for up and down movement) could already cause
a
loss of half of the signal (-3dB)

When the left rim is pushed back 7mm (and the right rim comes forward
7mm)
you have a 1degree misalignment!
If your mounting brackets are not that stiff (like the one from Robert
Moore) they could bend too much in the wind.
As Robert discovered the dish will start to oscillate and the signal
drops
and rises too fast to be detected on the Signal Quality readout.
I have not tried this but I guess you can detect the signal drops using
a
Satellite signal meter because this does not average.

But now an interesting case: Suppose the dish is already 0.5 degree
misaligned, normally this will only give a small signal reduction but
now
you only have an allowable deflection of 3.5 mm in one direction ! That
really requires a very stiff dish mounting !

I welded a wall mounting myself because I was not satisfied with the
commercially available mounts, they are too long and the bolts fixing
the
mounting to the wall are placed very close to each other.
I placed the dish as close to the wall as possible to keep the mount as
short as possible.
Take a look at the file I uploaded to the Files area.
80cmMSGdish.jpg (288 kb)

So if you suffer from missing segments at high winds, watch for movement
of
the dish..
Don't mount the dish on a high or unprotected spot if there is no need.
Have the dish re-aligned with a Satellite signal meter because
wind-movement will aggravate any error.
If necessary add additional bracing(s) to a fixed point to prevent the
dish
from oscillating in high winds.

Compared to receiving Meteosat 7 on 1691 MHz we need a more accurate
alignment and a stiffer mount.
There is not much difference between receiving digital TV satellites and
MSG over DVB, but every short "freeze" on a TV satellite set will result
in
a lost segment on MSG !

Greetings,
Arne van Belle



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



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





------------------------------
Professor Robert Moore
Department of Sociology, Social Policy
and Social Work Studies
The University of Liverpool
Eleanor Rathbone Building
Bedford Street South
Liverpool
L69 7ZA

tel and fax: 44 (0) 1352 714456


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



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


Re: MSG-1 Dish alignment and wind

Robert Moore
 

I have real problems because my dish is mounted in the only place on my house
where I can see MSG-1. I am going to fix a mild steel rod from the mounting
pole to the wall some way from the bracket so that I have a strong triangle.
Today I have tried to damp the oscillation of the dish on the pole by placing a
light rubber rope around the bottom of the dish and the bracket, there is
hardly any tension on this but I hope it will stop pole and dish oscillating in
sync and thus amplifying small movements. I'll have to see - when the wind
blows.
My unavoidable dish-exposure is slightly compensated for by the fact that I am
exposed from west through north to east, whereas the prevailing winds are from
the south west - even a SW gale leaves my garden calm, though the clouds race
overhead.
SO I'm hoping that with some damping and far fewer NW winds I will not suffer
too much loss over the year. Those of us with similar problems can keep one
another posted through the list.
Robert.

Quoting Arne van Belle <a.van.belle@hccnet.nl>:

David wrote:
Interestingly, during wind and rain, when I have missed segments,
the indicators have not dropped anything like that low, suggesting
perhaps that the indicators average over too long a period to show
problems, and that momentary drops due to wind (moving the dish) may
be quite important.

My findings:
The Signal Quality readout is a 1-second average value that does not detect
short signal drops.
As the name implies it does not show signal level but the quality of the
received signal !
When I put an additional line-amplifier in, the readout remains the same
and during a solar outage the readout dropped where as my Satellite signal
meter showed and increase.

I did some calculations based on receiving Hotbird with an 88 cm dish.
This dish has a "half power" beam-width of only 2 degrees at 11096 MHz. So
if the dish moves in windy conditions, a deflection of 1 degree left and 1
degree right (same applies for up and down movement) could already cause a
loss of half of the signal (-3dB)

When the left rim is pushed back 7mm (and the right rim comes forward 7mm)
you have a 1degree misalignment!
If your mounting brackets are not that stiff (like the one from Robert
Moore) they could bend too much in the wind.
As Robert discovered the dish will start to oscillate and the signal drops
and rises too fast to be detected on the Signal Quality readout.
I have not tried this but I guess you can detect the signal drops using a
Satellite signal meter because this does not average.

But now an interesting case: Suppose the dish is already 0.5 degree
misaligned, normally this will only give a small signal reduction but now
you only have an allowable deflection of 3.5 mm in one direction ! That
really requires a very stiff dish mounting !

I welded a wall mounting myself because I was not satisfied with the
commercially available mounts, they are too long and the bolts fixing the
mounting to the wall are placed very close to each other.
I placed the dish as close to the wall as possible to keep the mount as
short as possible.
Take a look at the file I uploaded to the Files area.
80cmMSGdish.jpg (288 kb)

So if you suffer from missing segments at high winds, watch for movement of
the dish..
Don't mount the dish on a high or unprotected spot if there is no need.
Have the dish re-aligned with a Satellite signal meter because
wind-movement will aggravate any error.
If necessary add additional bracing(s) to a fixed point to prevent the dish
from oscillating in high winds.

Compared to receiving Meteosat 7 on 1691 MHz we need a more accurate
alignment and a stiffer mount.
There is not much difference between receiving digital TV satellites and
MSG over DVB, but every short "freeze" on a TV satellite set will result in
a lost segment on MSG !

Greetings,
Arne van Belle



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



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





------------------------------
Professor Robert Moore
Department of Sociology, Social Policy
and Social Work Studies
The University of Liverpool
Eleanor Rathbone Building
Bedford Street South
Liverpool
L69 7ZA

tel and fax: 44 (0) 1352 714456


Re: Signal strenght reading

Alan Sewards <alan.sewards@...>
 

Hi all,
I didn't see any reply to this posting, but does anyone know what the
Signal Quality indication is based on? Usually with digital satellite
channels, raw strength is shown as Signal Strength (presumably C/N), and
some factor based on error rates is used to show Signal Quality. Those of
you who have Sky systems can see these two indications, and it is
interesting to move the dish slightly and watch them. A tiny movement will
have no effect on signal strength but a pronounced one on Signal Quality.
For the TechniSat card, Signal Quality is obviously not the same as the BER,
as in my case the BER has always been zero, but the SQ hovers around 70%, so
exactly what is being measured here? In my early days as a satellite
communicator, we used to measure Eb/No as a sensitive measure of channel
quality, as well as C/No (more mundane). One could also look at the eye
diagram and draw analog conclusions from that.

BTW, the recent changes to MDM to mitigate the effects of late or
missing segments has had a dramatic effect on the Animations, which are now
almost perfect (at least they would be if there weren't any missing cycles).
Congratulations to David and his team of eagle-eyed observers, and many
thanks from one who has benefitted.

Best regards - Alan

----- Original Message -----
From: "Luca Bertagnolio" <lucaberta@yahoo.com>
To: <MSG-1@yahoogroups.com>
Sent: Tuesday, October 07, 2003 3:33 PM
Subject: [MSG-1] Re: Signal strenght reading


--- In MSG-1@yahoogroups.com, "David Taylor" <david-taylor@b...>
wrote:
Do we know how the signal strength readings compare on the USB and
PCI versions? I know that when my PCI card indication drops below
50% (yellow, I thnk) the BER goes up quite noticeably and segment
drop-outs do occur.
very good point David. Next step is to plug in the SkyStar2 PCI card
I have to check if there is any major difference. I have both a 2.3
and a 2.6 version, so I can also see if there is any big difference
between the two (and I am sure there is, reading other people's
email).

I'll let you once I'll do these tests.

Bye, Luca




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



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




What does the future hold....

Alan Sewards <alan.sewards@...>
 

I am wondering what the outcome of this Dissemination Trial will be. It
could have a big impact on the attitude to the provision of high resolution
data, but on the other hand, commercial considerations may prevail. Let me
explain what I mean.

Early weather satellites (Tiros series) were polar orbiters, and carried
their own means of dissemination with them, largely because there was (and
is) no reasonable alternative for such satellites. The main data channel was
HRPT, but for the benefit of people without the resources to install a full
HRPT ground station, a low resolution signal was also produced and
transmitted using the APT channel, which could be received by a relatively
low cost receiving setup. (I am writing here about the situation when the
Tiros series was designed.) When a geostationary weather satellite was
designed, this same principle was carried through, in the GVAR and WEFAX
channels, and WEFAX was sensibly designed to be similar enough to APT that
much of the same equipment could be reused. Of course, in the case of the
GOES and Meteosat geostationary satellites, alternative means of
dissemination could have been used, but the authorities responsible for
these satellites decided to keep control of the whole thing and added
bent-pipe transponders to them which served as the dissemination channels.
The important thing to note here is that the high resolution channel carries
a much higher cost penalty for the user than the low resolution one,
although the differential has reduced a lot since the early days.

What the serendipitous loss of the SSPA on MSG-1 has showed is that this
high vs. low resolution differential is now meaningless from the technical
viewpoint of the communications channel. It is just as easy to disseminate
files containing HR data as LR data over the TV satellite channels now being
used for the trial. From this viewpoint, LR data, that is data whose
resolution has been artificially reduced so that it can be transmitted over
a lower bandwidth and hence lower cost channel, is quite unnecessary and
could be dispensed with.

This conclusion is reached from the viewpoint of the communications, but
there are also commercial aspects to be considered. From the Eumetsat
viewpoint, HR data is probably more valuable than LR data, and users may be
prepared to pay more for it - if this is believed to be the case, the
distinction between HR and LR data may be continued, even though the
original technical reason for the difference has vanished.

Will MSG-2 have an SSPA allotted to the job of data dissemination? Will the
SSPA be omitted or used as a backup for the really important jobs of
satellite control, telemetry and sensor downlinks? Is the TV satellite
dissemination approach the next generation, or will it be quietly dropped
after MSG-1 as it potentially upsets the charging basis for the data?

Alan Sewards
email: alan.sewards@computer.org
web site: http://asewards.free.fr


Re: Solar outage

Ian S Deans <ian@...>
 

David, thanks for confirming you had problems at the same time. I don't
think the cause of the loss was at this end, I am sure these sectors were
never sent and I am willing to bet no one got them. ( that will get a few
replies !! )

Regards

Ian

----- Original Message -----
From: "David Taylor" <david-taylor@blueyonder.co.uk>
To: <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 3:28 PM
Subject: [MSG-1] Re: Solar outage


--- In MSG-1@yahoogroups.com, "Ian S Deans" <ian@i...> wrote:
Wish you hadn't said that !!! Major sector loss 12.30 and 12.45
UTC
although up to then weekend had been excellent.

Ian
That _is_ interesting Ian. I had a trouble-free morning, but 1230
and 1245 UTC were bad. OK since then. Co-incidence or what?

Cheers,
David


Re: Solar outage

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

--- In MSG-1@yahoogroups.com, "Ian S Deans" <ian@i...> wrote:
Wish you hadn't said that !!! Major sector loss 12.30 and 12.45
UTC
although up to then weekend had been excellent.

Ian
That _is_ interesting Ian. I had a trouble-free morning, but 1230
and 1245 UTC were bad. OK since then. Co-incidence or what?

Cheers,
David


Re: Solar outage

Ian S Deans <ian@...>
 

Wish you hadn't said that !!! Major sector loss 12.30 and 12.45 UTC
although up to then weekend had been excellent.

Ian

----- Original Message -----
From: "Douglas Deans" <douglas@dsdeans.freeserve.co.uk>
To: "MSG-1" <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 12:30 PM
Subject: Re: [MSG-1] Solar outage



----- Original Message -----
From: "David Taylor" <david-taylor@blueyonder.co.uk>
To: <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 12:07 PM
Subject: [MSG-1] Solar outage
Last 2 days have been excellent. Nothing lost of the channels I take and
the times I receive. Fantastic animations.

Regards
Douglas.


MSG-1 Dish alignment and wind (Was solar outage)

a_van_belle
 

David wrote:
Interestingly, during wind and rain, when I have missed segments,
the indicators have not dropped anything like that low, suggesting
perhaps that the indicators average over too long a period to show
problems, and that momentary drops due to wind (moving the dish) may
be quite important.

My findings:
The Signal Quality readout is a 1-second average value that does not detect
short signal drops.
As the name implies it does not show signal level but the quality of the
received signal !
When I put an additional line-amplifier in, the readout remains the same
and during a solar outage the readout dropped where as my Satellite signal
meter showed and increase.

I did some calculations based on receiving Hotbird with an 88 cm dish.
This dish has a "half power" beam-width of only 2 degrees at 11096 MHz. So
if the dish moves in windy conditions, a deflection of 1 degree left and 1
degree right (same applies for up and down movement) could already cause a
loss of half of the signal (-3dB)

When the left rim is pushed back 7mm (and the right rim comes forward 7mm)
you have a 1degree misalignment!
If your mounting brackets are not that stiff (like the one from Robert
Moore) they could bend too much in the wind.
As Robert discovered the dish will start to oscillate and the signal drops
and rises too fast to be detected on the Signal Quality readout.
I have not tried this but I guess you can detect the signal drops using a
Satellite signal meter because this does not average.

But now an interesting case: Suppose the dish is already 0.5 degree
misaligned, normally this will only give a small signal reduction but now
you only have an allowable deflection of 3.5 mm in one direction ! That
really requires a very stiff dish mounting !

I welded a wall mounting myself because I was not satisfied with the
commercially available mounts, they are too long and the bolts fixing the
mounting to the wall are placed very close to each other.
I placed the dish as close to the wall as possible to keep the mount as
short as possible.
Take a look at the file I uploaded to the Files area.
80cmMSGdish.jpg (288 kb)

So if you suffer from missing segments at high winds, watch for movement of
the dish..
Don't mount the dish on a high or unprotected spot if there is no need.
Have the dish re-aligned with a Satellite signal meter because
wind-movement will aggravate any error.
If necessary add additional bracing(s) to a fixed point to prevent the dish
from oscillating in high winds.

Compared to receiving Meteosat 7 on 1691 MHz we need a more accurate
alignment and a stiffer mount.
There is not much difference between receiving digital TV satellites and
MSG over DVB, but every short "freeze" on a TV satellite set will result in
a lost segment on MSG !

Greetings,
Arne van Belle


Re: [rig-l] MSG encryption latest 12-10-03.

Douglas Deans <douglas@...>
 

----- Original Message -----
From: <johnrigsec@aol.com>
To: <MSG-1@yahoogroups.com>; <rig-l@yahoogroups.com>;
<WXSAT-L@huey.met.fsu.edu>
Sent: Sunday, October 12, 2003 1:40 PM
Subject: [rig-l] MSG encryption latest 12-10-03.


All,

I had a chat with EUMETSAT during the week and the situation regarding
encryption
now appears to be more definite.

Current plan is that December 2nd will be encryption test day and there
will
be several hours of encryption.
Some users have already been supplied with the EKU - EUMETCast Key Unit -
and
will be feeding back results.
Others will receive nothing - so be pre-warned.

Full encryption is now planned for March 2004.

The 'key' will be supplied by EUMETSAT with the supporting software for
40 Euro.

Regards,
John Tellick.
RIG.
Thanks for the latest news John. Just one question springs to mind.
Presumably those of us on the trial will be approached to purchase the
EumetCast Key Unit assuming of course we have indicated on our registration
that we propose to take data (and get our necessary licence) after the
trial. Or do we need to write and ask for it.
I also wonder if encryption in March is a pre-cursor to MSG becoming the
operational sat. also being put back to March. Not that it matters as long
as we continue to receive this marvellous stream of data.

Thanks again.
Douglas.


Re: Solar outage

Douglas Deans <douglas@...>
 

----- Original Message -----
From: "David Taylor" <david-taylor@blueyonder.co.uk>
To: <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 12:07 PM
Subject: [MSG-1] Solar outage


My worst day was today at 10:47 UTC. At the peak, the reported
quality was 29% (yellow), SNR ~4.8dB, BER ~6E-3. However, I seem
not to loose any segments (probably just luck, as it was just past
the 15-minute point, where Eumetcast goes silent for about a minute.

Interestingly, during wind and rain, when I have missed segments,
the indicators have not dropped anything like that low, suggesting
perhaps that the indicators average over too long a period to show
problems, and that momentary drops due to wind (moving the dish) may
be quite important.

Open for discussion....

Cheers,
David
Yes and following my own experience of accidentally exiting the DVB program
and reloading (without closing Tellique), followed by a 10% + segment loss,
it makes me wonder if a complete loss of signal, however momentary, will
behave the same as exiting the program and re-loading. That would then
give a large segment loss. Apart from the log file there is no way of
knowing because the programs both give an outward appearance of working
normally.
I now leave well alone.
Last 2 days have been excellent. Nothing lost of the channels I take and
the times I receive. Fantastic animations.

Regards
Douglas.


Solar outage

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

My worst day was today at 10:47 UTC. At the peak, the reported
quality was 29% (yellow), SNR ~4.8dB, BER ~6E-3. However, I seem
not to loose any segments (probably just luck, as it was just past
the 15-minute point, where Eumetcast goes silent for about a minute.

Interestingly, during wind and rain, when I have missed segments,
the indicators have not dropped anything like that low, suggesting
perhaps that the indicators average over too long a period to show
problems, and that momentary drops due to wind (moving the dish) may
be quite important.

Open for discussion....

Cheers,
David


Re: Beware of personal firewalls!

Luca Bertagnolio <lucaberta@...>
 

Robert,

sweet music to my ears! I happen to be the Product Manager in Europe
for that product... ;-)

BTW, Cisco uses a full Zone Alarm firewall in the VPN Client, with
default policies that can only be changed by the VPN Concentrator
administrator, not by the user. Most of the times the default
policies will be plenty enough though, like in your case.

Bye, Luca

--- In MSG-1@yahoogroups.com, Robert Moore <rsmoore@l...> wrote:
I am currently running Cisco's VP Client software which
automatically provides a
firewall even when you are not using it as a client. It solved all
my
problems.


Re: Beware of personal firewalls!

Robert Moore
 

Just a word of warning, though. I think you need to be very familiar with
networking, IP addresses ports etc to get a firewall working effectively. I
found Zone Alarm very hard to use and the help files unhelpful. I persisted for
a while but eventually had to give up when all traffic on my network was being
fatally disrupted.
I am currently running Cisco's VP Client software which automatically provides a
firewall even when you are not using it as a client. It solved all my
problems.

Robert


Quoting Alan Sewards <alan.sewards@computer.org>:

Ferdinand and Luca
Use Zone Alarm - you can easily configure it to allow the Tellique data
to pass.

Good luck! - Alan

----- Original Message -----
From: "fvalk" <fvalk@fvalk.com>
To: <MSG-1@yahoogroups.com>
Sent: Sunday, October 12, 2003 8:36 AM
Subject: Re: [MSG-1] Beware of personal firewalls!


I had the same conclusion several months ago with McAfee firewall on my
network. None of the program's authorization or other settings could help.
Only "Stop Firewall" gave freedom to the IP traffic towards Tellique.
Thus far I was unable to circumvent this unwanted behaviour and so I
decided to
live with it.

Anyone a brilliant suggestion that allows firewall to be active and
Tellique to
work?

Ferdinand

---------- Original Message -----------
From: "Luca Bertagnolio" <lucaberta@yahoo.com>
To: MSG-1@yahoogroups.com
Sent: Sat, 11 Oct 2003 22:14:32 -0000
Subject: [MSG-1] Beware of personal firewalls!

Just received news of a successful install of Tellique 2.3.1 which
was stuck for no apparent reason.

Turns out the personal firewall software was getting in the way, and
was stopping the IP packet flow out of the DVB card virtual Ethernet
driver toward Tellique.

The moment the personal firewall was switched off, data started to
flow in the received directory...

Bye, Luca


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



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






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



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





------------------------------
Professor Robert Moore
Department of Sociology, Social Policy
and Social Work Studies
The University of Liverpool
Eleanor Rathbone Building
Bedford Street South
Liverpool
L69 7ZA

tel and fax: 44 (0) 1352 714456