Date   
Re: Met-11 - MET-9 mission swap

stevens312
 

Thanks for the info David wondered what was going on. Regards, Mike.

Met-11 - MET-9 mission swap

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Notice from EUMETSAT

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Message number: 4968
Message creation: Wed Jul 11 03:41:51 UTC 2018

Type: Service Alert
Ann Nr: 3975
Rev: 2
Start Time: 2018-07-11 03:30:00.0
Satellites: MET-9,MET-11
Subject: Mission-Swap
Detail: Service interrupted. MET-9 operates in Full Earth Scan mode for service continuity and MET-9 data is disseminated instead. Due to the mission swap, users will not be able to order any products from MET-9 Archive catalogue. [Rev 2]: The mission swap took place at 03:30. Due to the mission swap, users may experience delays in the updates to the Data Centre Archive catalogue
Status: ongoing
Issue Time: 2018-07-11 02:28:33.0
Services: 0° Meteosat Meteorological Products
0° SEVIRI Level 1.5 Image Data
GERB
MSG Direct Dissemination

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: TP-1 SNR.

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

David,

Well, a further update, the Sun has been off the dish and LNB for a few hours now due to cloud - and I installed a fan on the SR1 which is now cold and SNR is still down at 'lower' levels at 16:10 UTC and still 'stepping.'
At 16:08 the SNR 13.5 to 13.8 and back.
At 16:25 still stepping 13.6/.7/.8 with a .5 thrown in every now and again.

I should have added originally my Power reading drops to - 27 dBm when the dish and LNB are in full Sun.
- 26 in later afternoon and if the evening is cooler - some hope - at -25 every now and gain, which it was last winter/Spring.

Yes, an automated plot with a span of 12.5 to 14.5 dB SNR would be very useful.
I say from 12.5 since for the first time since monitoring my levels regularly my SNR has dropped below 13.00 dB for a short period today.

Regards,
John.
===============================

John,

I have a program which plots SNR from the BDADataEx software:

http://www.satsignal.eu/software/beta.htm

used for solar outage plotting. The recording part works stand-alone, and the plotting part could easily be updated. You'd need a TBS receiver, though. Or use MRTG with the Ayecka SR1 as detailed in my notes:

http://www.satsignal.eu/wxsat/dvb-s2/sr1-mrtg.html

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: TP-1 SNR.

geojohnt@...
 

David,

Well, a further update, the Sun has been off the dish and LNB for a few hours now due to cloud - and I installed a fan on the SR1 which is now cold and SNR is still down at 'lower' levels at 16:10 UTC and still 'stepping.'
At 16:08 the SNR 13.5 to 13.8 and back.
At 16:25 still stepping 13.6/.7/.8 with a .5 thrown in every now and again.

I should have added originally my Power reading drops to - 27 dBm when the dish and LNB are in full Sun.
- 26 in later afternoon and if the evening is cooler - some hope - at -25 every now and gain, which it was last winter/Spring.

Yes, an automated plot with a span of 12.5 to 14.5 dB SNR would be very useful.
I say from 12.5 since for the first time since monitoring my levels regularly my SNR has dropped below 13.00 dB for a short period today.

Regards,
John.

+++++++++++++++++++

In a message dated 09/07/2018 14:26:38 GMT Standard Time, gm8arv@... writes:

I'm inclined to agree with EUMETSAT - it's adequate, so not a major concern.

As I've mentioned before, having automated plots saves a lot of time in
measuring the problem, and is relatively easy to do.

Re: TP-1 SNR.

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

-----Original Message-----
From: geojohnt via Groups.Io
Sent: Monday, July 9, 2018 2:07 PM
To: MSG-1@groups.io
Subject: Re: [MSG-1] TP-1 SNR.


Hello Arne, David and Ian,

Thanks for your comments.

Arne, firstly I have always had a diurnal variation in SNR of up to 0.5 dB.
What I've had for the last two months(?) is the same span of variation but at overall lower levels.
That is, originally around 14.4 dB to 13.9 dB - now 13.9/14.00 to 13.5/.4 - .3 at times. day, sun on dish.

David, my link margin variation follows the SNR levels exactly - that is:

SNR 14.4 dB = 8.5 dB link margin on BS.
SNR 14.4 dB = 5.1 link margin on HVS.

SNR of 13.4 db = 7.5 dB link margin on BS.
SNR of 13.4 dB = 4.1 dB link margin on HVS.

My skew is 8 degrees, which it should be and I can't get anymore SNR with adjustment of the azimuth or elevation.
The only other change is the removal of a tall ivy bush on a wall to the SW of 10 east.

The dish is on the patio against a tall wooden fence covered in ivy and adjacent to a white painted brick wall by its side.
The patio is covered with plants so doesn't heat up much.


However, the (grey) dish and LNB do get very hot with the sun on them - and the sun is a very high elevation at this time of year.
Not to mention our continuous daytime ambient temperature of 27 - 30 degrees.
There is a weak cold front sinking south today so I'm hoping for a bit more cloud to take the dish and LNB temperature down

I'll send all the relevant photos direct to you.

I noticed yesterday that MY SR1 was hot with an ambient room temperature of 27 degrees.

Also, EUMETSAT said:

"Our engineers think that what you reported is a normal daily variation
due to different possible reasons. They pointed that your link margin
values are good and they would also like to confirm that there have not
been any 'satellite RF changes' on our side."

And I think I wrote a GEO article last year regarding signal variation from satellites owing to Atmospheric disturbances.
I can't find it though but I found this today.

https://www.radio-electronics.com/info/satellite/satellite_sig_prop/satellite_signal_propagation.php

So, the uplink and downlink are going to suffer if the atmosphere is 'turbulent?'

I'm very tempted to leave the dish alone and see what happens in Oct/Nov/Dec.

13:00 UTC dish now 'cold' with cloud, LNB quite warn in ambient temperature of 29 degrees, SNR stepping around a bit at the moment - 13:03 steady around 13.4/.5 then stepping around at times from 13.2 to 13.6, 13.6 to 13.3, 13.3 to 13.7. Down to 13.1 for short periods. ???
=============================

John,

I'm inclined to agree with EUMETSAT - it's adequate, so not a major concern.

As I've mentioned before, having automated plots saves a lot of time in measuring the problem, and is relatively easy to do.

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: TP-1 SNR.

geojohnt@...
 

Hello Arne, David and Ian,

Thanks for your comments.

Arne, firstly I have always had a diurnal variation in SNR of up to 0.5 dB.
What I've had for the last two months(?) is the same span of variation but at overall lower levels.
That is, originally around 14.4 dB to 13.9 dB - now 13.9/14.00 to 13.5/.4 - .3 at times. day, sun on dish.

David, my link margin variation follows the SNR levels exactly - that is:

SNR 14.4 dB = 8.5 dB link margin on BS.
SNR 14.4 dB = 5.1 link margin on HVS.

SNR of 13.4 db = 7.5 dB link margin on BS.
SNR of 13.4 dB = 4.1 dB link margin on HVS.

My skew is 8 degrees, which it should be and I can't get anymore SNR with adjustment of the azimuth or elevation.
The only other change is the removal of a tall ivy bush on a wall to the SW of 10 east.

The dish is on the patio against a tall wooden fence covered in ivy and adjacent to a white painted brick wall by its side.
The patio is covered with plants so doesn't heat up much.

However, the (grey) dish and LNB do get very hot with the sun on them - and the sun is a very high elevation at this time of year.
Not to mention our continuous daytime ambient temperature of 27 - 30 degrees.
There is a weak cold front sinking south today so I'm hoping for a bit more cloud to take the dish and LNB temperature down.

I'll send all the relevant photos direct to you.

I noticed yesterday that MY SR1 was hot with an ambient room temperature of 27 degrees.

Also, EUMETSAT said:

"Our engineers think that what you reported is a normal daily variation
due to different possible reasons. They pointed that your link margin
values are good and they would also like to confirm that there have not
been any 'satellite RF changes' on our side."

And I think I wrote a GEO article last year regarding signal variation from satellites owing to Atmospheric disturbances.
I can't find it though but I found this today.


So, the uplink and downlink are going to suffer if the atmosphere is 'turbulent?'

I'm very tempted to leave the dish alone and see what happens in Oct/Nov/Dec.

13:00 UTC dish now 'cold' with cloud, LNB quite warn in ambient temperature of 29 degrees, SNR stepping around a bit at the moment - 13:03 steady around 13.4/.5 then stepping around at times from 13.2 to 13.6, 13.6 to 13.3, 13.3 to 13.7. Down to 13.1 for short periods. ???

++++++++++++++++++

In a message dated 05/07/2018 08:59:50 GMT Standard Time, gm8arv@... writes:

Remarkable that John sees a lot a variation, Ian is clearly on the edge of
the footprint which does add more variations but John's location should not
be affected.
John your recent change is most likely due to the Cross-polarised signal
that switches on and off at irregular times.
Adjusting your LNB skew for max SNR should get rid of this.
The daily variation could be noise generated from the heated pavement (then
minimal SNR at max, sun) or a slight dish miss-alignment combined with the
figure 8 satellite wobble.

Over here nothing but steady SNR now that we have not had any rain for over
a month !
My dish is mounted on a south-facing wall that heats up enormous with 30
degrees (measured in the shade !)
But my pavement under the dish is mostly shaded and at 2 meters distance. So
I don't see any daily variation.
T1 shows a steady 11.8 db SNR:
http://home.hccnet.nl/a.van.belle/MRTG/dvbdataex-snr-p1-tbs6983-tunera.html
T2 is a bit lower at 112 dB SNR:
http://home.hccnet.nl/a.van.belle/MRTG/dvbdataex-snr-p1-tbs6983-tunerb.html

Greetings,
Arne van Belle
============================================

Arne,

I'm also coming to the conclusion that external heating is causing problems
here. Just recently I've noticed a sharp drop in link margin (a more
sensitive indication than SNR as it's a much smaller number) with timings
which suggest it drops when the sun first hits the LNB in the morning and
recovers when the sun disappears round the edge of the house. I haven't
noticed this before and wonder whether it might be due to dust or bird
droppings on the LNB cover (no rain here either to wash off dust), but
visual inspection shows nothing. I would expect a wall to heat up more
slowly than the sudden changes I'm seeing.

Re: High Res Pictures.

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Hi guys. I am looking for a nice picture from space to put in my living room.

Wich sat has the best resoliution/colors. And what kind of program do you prefer?
Normaly i use Davids profs. But Eumetcastview is also very nice (does it have an export to JPG option).

I prefer a picture from the netherlands, and or europe.

Kind regards, Peter
====================================

Peter,

The highest resolution if from Sentinel-2, at 10m/pixel, so its 10,000-wide images are about 100 km in coverage. You would need to combine several images (e.g. using my free program) to cover the entire Netherlands.

https://www.satsignal.eu/wxsat/Sentinel/Sentinel-2A.html

There are plenty of images on the Internet:

https://www.esa.int/spaceinimages/Images/2018/03/Netherlands_ice
https://phys.org/news/2017-05-image-amsterdam-netherlands.html
https://www.esa.int/spaceinimages/Images/2017/05/Amsterdam_Netherlands

and this site offers 10m resolution images of many cities, including Amsterdam:

https://sevcikcartography.wixsite.com/cartography
https://sevcikcartography.wixsite.com/cartography/amsterdam
https://static.wixstatic.com/media/948cd1_cd0c7f3c0ae14bd39b5522810dce6df5~mv2_d_4961_3508_s_4_2.jpg?dn=

and, of course, this stunning image of Europe which Ferdinand Valk produced using my HRPT Reader and Ground Map software with his own image processing and combining skills:

http://www.fvalk.com/groundmap.htm
http://www.fvalk.com/images/GroundMap/2002-09-14-n16-17remap.jpg


Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: High Res Pictures.

Ferdinand Valk
 

Hi Peter,

 

Then best would be a Sentinel image with high enough resolution to be printed A-0. Sentinel is on Eumetcast but also searchable via the web.

 

Cheers,

Ferdinand

 

From: MSG-1@groups.io <MSG-1@groups.io> On Behalf Of Peter van der Struijs
Sent: Sunday, 08 July, 2018 16:56
To: MSG-1@groups.io
Subject: [MSG-1] High Res Pictures.

 

Hi guys. I am looking for a nice picture from space to put in my living room.

Wich sat has the best resoliution/colors. And what kind of program do you prefer?
Normaly i use Davids profs. But Eumetcastview is also very nice (does it have an export to JPG option).

I prefer a picture from the netherlands, and or europe.

Kind regards, Peter

High Res Pictures.

Peter van der Struijs
 

Hi guys. I am looking for a nice picture from space to put in my living room.

Wich sat has the best resoliution/colors. And what kind of program do you prefer?
Normaly i use Davids profs. But Eumetcastview is also very nice (does it have an export to JPG option).

I prefer a picture from the netherlands, and or europe.

Kind regards, Peter

R: [MSG-1] Gibertini OP 125L

Stefano Mina
 

Good evening I would like to suggest another type of antenna that is easy to assemble and that does not require a high diameter support. The Laminas OFC 1200 that I installed personally and in fiberglass with a weight of 8 kg. It is very manageable and resistant and this is an advantage for the determination at 10 E with the various movements in azimuth and elevation Here in central Italy I managed to get a good snr of 15 db on TP1 with 20 meters of cable!
http://www.laminas.com.pl/page_eng/ofc1200_eng.html
There are various European distributors
Greetings
 
Stephen

 

Da: MSG-1@groups.io <MSG-1@groups.io> Per conto di Ernst Lobsiger
Inviato: domenica 8 luglio 2018 15:09
A: MSG-1@groups.io
Oggetto: Re: [MSG-1] Gibertini OP 125L

 

Peter

Yes this is really fundamental physics: For a given frequency the bigger the antenna size the smaller the beam width and the harder to point the beam to the sat. Your Gibertini OP 150s has a half power beam width of 1.1°. You should manage to point it 0.5° from the SAT to get a signal  and then fine tune it to within 0,2°.

The TRIAX dishes I used up to now are known for very bad elevation adjustment possibilities. That's why I always added my special elevation rod that has been simplified and improoved for home brewing by Arne van Belle. From the construction the Gibertini OP 125L (also the OP 150s) comes with a good looking elevation rod out of the box. But it seems manufacturing precision of the OP 125L antenna mount is not what I expected. All antennas then have an azimuth pointing problem as long as they use the traditional pole clamps. And the pole diameter for a Gibertini OP 150s should definitely be 80mm (high wind loads) .

Ernst

Re: Gibertini OP 125L

Ernst Lobsiger
 

Peter

Yes this is really fundamental physics: For a given frequency the bigger the antenna size the smaller the beam width and the harder to point the beam to the sat. Your Gibertini OP 150s has a half power beam width of 1.1°. You should manage to point it 0.5° from the SAT to get a signal  and then fine tune it to within 0,2°.

The TRIAX dishes I used up to now are known for very bad elevation adjustment possibilities. That's why I always added my special elevation rod that has been simplified and improoved for home brewing by Arne van Belle. From the construction the Gibertini OP 125L (also the OP 150s) comes with a good looking elevation rod out of the box. But it seems manufacturing precision of the OP 125L antenna mount is not what I expected. All antennas then have an azimuth pointing problem as long as they use the traditional pole clamps. And the pole diameter for a Gibertini OP 150s should definitely be 80mm (high wind loads) .

Ernst

Re: Gibertini OP 125L

Thorsten Miglus
 

Peter,

the answer is yes. The larger a dish the smaller his beam width.

Cheers
Thorsten


On Sun, Jul 8, 2018 at 05:24 am, <diogenes@...> wrote:
Since the Gibertini dishes have become a topic can I ask a rather fundamental  question ? Is it more difficult to align a dish the larger it is? I ask this because I install a 1.5m Gibertini dish a year ago but I have never been able to align it with a satellite.
Regards,
Peter

Re: Gibertini OP 125L

diogenes1@...
 

Since the Gibertini dishes have become a topic can I ask a rather fundamental  question ? Is it more difficult to align a dish the larger it is? I ask this because I install a 1.5m Gibertini dish a year ago but I have never been able to align it with a satellite.
Regards,
Peter

Re: Gibertini OP 125L

Thorsten Miglus
 

Ernst,

it is more then one year ago when I mounted my dish. I can not remeber all the details.
But yes, I had the same problem as you.
Force was needed to locate the dish mout over the pole clamp.
I think this is intended to make the dish mount very stable.
Be aware that the fine tune elevation rod can only be used in the range of +/- 1 degree.
In the first step loose the two nuts on the fine tune rod.
When the dish is completely assembled you can grab the dish with your two hands on the upper an lower end.
Then turn it up and down to roughly tune the elevation until you can receive Eutelsat 10A.
Afterwards use the fine tune rod to optimise the elevation for best SNR.

Cheers,
Thorsten



On Sat, Jul 7, 2018 at 10:46 pm, Ernst Lobsiger wrote:

Thorsten

The pole of my home brew tripod is 60 mm but I noticed an optimum
pole would be 75 to 80 mm. The image I attached is taken from the
internet just to show the layout. My mount is still on the table
and the dish not attached. So nothing can be bent. By inner (and
massive) part of the clamp you probably mean the problem half that
is not seen on our pictures. It's the part that will end between
pole and dish. This part takes the 3 long horizontal bolts that
end with the nuts visible at right. Moving elevation turns around
the center bolt. This part of the clamp is just too wide for the
plates it fits between. The plates are part of the big steel
pressed form piece. From the construction the gap cannot easily
be widened even by 1 mm. Thats why already intoducing the inner
clamp was a real pain. Greasing with a WD40 spray did not help.
No chance to fine tune with the elevation rod on the bottom.
The friction forces are just too high even with loose bolts.

Ernst

Re: Gibertini OP 125L

Ernst Lobsiger
 

Thorsten

The pole of my home brew tripod is 60 mm but I noticed an optimum
pole would be 75 to 80 mm. The image I attached is taken from the
internet just to show the layout. My mount is still on the table
and the dish not attached. So nothing can be bent. By inner (and
massive) part of the clamp you probably mean the problem half that
is not seen on our pictures. It's the part that will end between
pole and dish. This part takes the 3 long horizontal bolts that
end with the nuts visible at right. Moving elevation turns around
the center bolt. This part of the clamp is just too wide for the
plates it fits between. The plates are part of the big steel
pressed form piece. From the construction the gap cannot easily
be widened even by 1 mm. Thats why already intoducing the inner
clamp was a real pain. Greasing with a WD40 spray did not help.
No chance to fine tune with the elevation rod on the bottom.
The friction forces are just too high even with loose bolts.

Ernst

Re: Gibertini OP 125L

Thorsten Miglus
 

Hi Ernst,

is your pole wide greater then 55 mm? The pole clamp specification says 55 mm - 100 mm.
Mine was not. I fixed this by introducing a second water pipe.
The two parts of the pole clamp should not touch if the clamp is tightened.
Maybe the inner part of the pole clamp is bend up by the outer part when a smaller pole then 55 mm is used?
Is this causing your problem?
Mounting the pole clamp between the two plates needs some force but not brute force.
Adjusting the elevation is no problem.




On Sat, Jul 7, 2018 at 11:33 am, Ernst Lobsiger wrote:

Dear All

Thorsten has a Gibertini OP 125L and maybe others too. I need your help.

I bought a Gibertini OP 125L, drove 300 km to fetch it with my car (they
do not deliver it in Switzerland). The OP 125L came in two packets dish
and antenna mount kit. In the shop I checked that the dish is alu because
Gibertini seems to produce the same dish in steel as well. I also checked
that the mount kit was the right one and complete. Today I wanted to assemble
the mount and found that it had transport damages I overlooked in the shop.
The problem was that the packet had the Gibertini sticker on the bottom
side and the "handle with care" glass and UP arrow was looking down. So
the packet was presented to me upside down and it has been transported that
way. But the damage did certainly not occur on the back seat of my car.
The main damage was a bent plate so that the two square tubes that
hold the LNB would not meet in the right place. I was able to fix every
thing with my mechanical skills. But now I have a real problem:

When I want to introduce the pole clamp between the two plates where
the clamp is fixed with 3 long screws this is only possible with brute
force. Actually the distance between the plates is 1-2mm less than the
width of the clamp. The result is that I can only change elevation
with brute force even when all 3 screws are loose. The clamp is blocked
and then jumps up to 5 degrees. It seems excluded that I can ever use
the fine tune elevation rod. Have I got a friday afternoon specimen?

Owners of OP 125L what is your experience? I think that after loosing
the 3 nuts I should be able to fine tune elevation down to +/- 0.1°.

It almost seems I'll have to drive another 300 km :-(

Ernst

Gibertini OP 125L

Ernst Lobsiger
 

Dear All

Thorsten has a Gibertini OP 125L and maybe others too. I need your help.

I bought a Gibertini OP 125L, drove 300 km to fetch it with my car (they
do not deliver it in Switzerland). The OP 125L came in two packets dish
and antenna mount kit. In the shop I checked that the dish is alu because
Gibertini seems to produce the same dish in steel as well. I also checked
that the mount kit was the right one and complete. Today I wanted to assemble
the mount and found that it had transport damages I overlooked in the shop.
The problem was that the packet had the Gibertini sticker on the bottom
side and the "handle with care" glass and UP arrow was looking down. So
the packet was presented to me upside down and it has been transported that
way. But the damage did certainly not occur on the back seat of my car.
The main damage was a bent plate so that the two square tubes that
hold the LNB would not meet in the right place. I was able to fix every
thing with my mechanical skills. But now I have a real problem:

When I want to introduce the pole clamp between the two plates where
the clamp is fixed with 3 long screws this is only possible with brute
force. Actually the distance between the plates is 1-2mm less than the
width of the clamp. The result is that I can only change elevation
with brute force even when all 3 screws are loose. The clamp is blocked
and then jumps up to 5 degrees. It seems excluded that I can ever use
the fine tune elevation rod. Have I got a friday afternoon specimen?

Owners of OP 125L what is your experience? I think that after loosing
the 3 nuts I should be able to fine tune elevation down to +/- 0.1°.

It almost seems I'll have to drive another 300 km :-(

Ernst

Re: TP-1 SNR.

Thorsten Miglus
 

Hi all,

when the LNB becomes hot this adds thermal noise to the electronics. Resulting in a SNR drop.
Therefore I expect lower SNR values during summer compared to the winter season.
With this knowledge I don't become nervous if the SNR drops on hot summer days.
In several weeks, when the winter comes, the SNR values will rise again.

Cheers,
Thorsten


On Thu, Jul 5, 2018 at 12:59 am, David J Taylor wrote:
Arne,

I'm also coming to the conclusion that external heating is causing problems here. Just recently I've noticed a sharp drop in link margin (a more sensitive indication than SNR as it's a much smaller number) with timings which suggest it drops when the sun first hits the LNB in the morning and recovers when the sun disappears round the edge of the house. I haven't noticed this before and wonder whether it might be due to dust or bird droppings on the LNB cover (no rain here either to wash off dust), but visual inspection shows nothing. I would expect a wall to heat up more slowly than the sudden changes I'm seeing.

Oh, for another couple of dB so that it wasn't so critical!

73,
David GM8ARV

Re: TP-1 SNR.

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Remarkable that John sees a lot a variation, Ian is clearly on the edge of the footprint which does add more variations but John's location should not be affected.
John your recent change is most likely due to the Cross-polarised signal that switches on and off at irregular times.
Adjusting your LNB skew for max SNR should get rid of this.
The daily variation could be noise generated from the heated pavement (then minimal SNR at max, sun) or a slight dish miss-alignment combined with the figure 8 satellite wobble.

Over here nothing but steady SNR now that we have not had any rain for over a month !
My dish is mounted on a south-facing wall that heats up enormous with 30 degrees (measured in the shade !)
But my pavement under the dish is mostly shaded and at 2 meters distance. So I don't see any daily variation.
T1 shows a steady 11.8 db SNR: http://home.hccnet.nl/a.van.belle/MRTG/dvbdataex-snr-p1-tbs6983-tunera.html
T2 is a bit lower at 112 dB SNR: http://home.hccnet.nl/a.van.belle/MRTG/dvbdataex-snr-p1-tbs6983-tunerb.html

Greetings,
Arne van Belle
============================================

Arne,

I'm also coming to the conclusion that external heating is causing problems here. Just recently I've noticed a sharp drop in link margin (a more sensitive indication than SNR as it's a much smaller number) with timings which suggest it drops when the sun first hits the LNB in the morning and recovers when the sun disappears round the edge of the house. I haven't noticed this before and wonder whether it might be due to dust or bird droppings on the LNB cover (no rain here either to wash off dust), but visual inspection shows nothing. I would expect a wall to heat up more slowly than the sudden changes I'm seeing.

Oh, for another couple of dB so that it wasn't so critical!

73,
David GM8ARV
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor@...
Twitter: @gm8arv

Re: EUMETCastView v1.4.0

Graham Woolf
 

Hi Hugo

 

Looks good now – many thanks. All I need now is for it to read the SLSTR-L2 files I get from Eumetcast and I will be really happy 😊

 

Thanks for a great piece of software

 

Kind Regards

 

Graham