Date   
Re: Linux or Windows 10?

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

From: diogenes@...

I am busy assembling a machine in order to receive and process Eumetcast data from HVS-2. I will be using another TBS 6903 but what concerns me is the operating system. I am using Windows 7 64bit for the machines running BAS and HVS-1 and I was going to use Windows 10 for the new pc. However I believe that this OS collects virtually everything it can, see https://privacy.microsoft.com/en-us/privacystatement

I know that there are a few out there using Linux. I use Ubuntu on other pcs but is it feasible for my requirements?
====================================

Peter,

Yes, Windows-10 can collect data if you choose to enable those options, but you can turn most of it off, especially in the current 1803 release. I have no issues with Windows-10 on that account, and I know than many here use Windows-10 without issues.

Google "disable personal data collection windows-10" for help.

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

Linux or Windows 10?

diogenes1@...
 

I am busy assembling a machine in order to receive and process Eumetcast data from HVS-2. I will be using another TBS 6903 but what concerns me is the operating system. I am using Windows 7 64bit for the machines running BAS and HVS-1 and I was going to use Windows 10 for the new pc. However I believe that this OS collects virtually everything it can, see https://privacy.microsoft.com/en-us/privacystatement

 

I know that there are a few out there using Linux. I use Ubuntu on other pcs but is it feasible for my requirements?

Re: EUMETCastView v1.3.9

Douglas Deans
 

On 28/06/2018 09:28, Hugo wrote:
Hi,
In this new release I included the standard EUMETSAT RGB recipes from METEOSAT/SEVIRI data as described by this document : http://www.eumetrain.org/RGBguide/recipes/recipes.pdf .
The images produced take a bit longer to calculate than normal. Some parts of the code ( calculations of brightness temperature, radiance and reflectance ) are taken from https://github.com/gmcgarragh/seviri_util made by Simon Proud.
You can download a Windows version from https://github.com/hvanruys/EUMETCastView/releases .
Hugo

===========================================================

Many thanks Hugo.
Granddaughter here today so will give it a try tonight.

Regards,
Douglas.

EUMETCastView v1.3.9

Hugo
 

Hi,
In this new release I included the standard EUMETSAT RGB recipes from METEOSAT/SEVIRI data as described by this document : http://www.eumetrain.org/RGBguide/recipes/recipes.pdf .
The images produced take a bit longer to calculate than normal. Some parts of the code ( calculations of brightness temperature, radiance and reflectance ) are taken from https://github.com/gmcgarragh/seviri_util made by Simon Proud.
You can download a Windows version from https://github.com/hvanruys/EUMETCastView/releases . Hugo

Fires on Saddleworth Moor

Hugo
 

GOES-R and Python

Hugo
 

Hello,

Found a nice DIY article on Hackaday . Some Python knowledge is required.
https://hackaday.com/2018/06/25/conquering-the-earth-with-cron/

Grts,
Hugo

Re: Signal

geojohnt@...
 

David,

Thanks for the list.

Regarding V interfering with H, unlike older V/H satellite downlink spacing regime, Eutelsat 10 were not using frequency offset as had been the original satellite TV norm.

I recall someones graphs earlier this year showed the V IP TV transmitted power (on the same frequency) to be (quite a bit) higher than EUMETCast transmitted power.
I'm not sure skew on a domestic LNB could completely overcome this?

Anyway, my problem is that for the last several weeks my overall SNR is 0.5 dB down compared to the sustained (sudden) increased overall level I (and others had) had earlier this year.

Mind you, the Sun is very high at the moment and no doubt the atmosphere is pretty active.
The dish and LNB are so hot (Power drops by 1 dBm to -27 whilst dish and LNB are in the sun, never mind the high ambient temperature), so maybe I'm not comparing like for like.

OK, I've got bags of link margin on BS but 4.1 dB @ 13.4 SNR on HVS (at the moment 11:40) - where weeks ago I had 4.6 dB @ 13.9 SNR (at this time).

Regards,
John.

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


In a message dated 26/06/2018 11:55:47 GMT Standard Time, gm8arv@... writes:

The V transponder transmissions should make little difference if the skew on
your LNB is correct. The V transmissions come and go all the time. I've
attached a list where the changes I spotted are noted.

Note that sometimes it appears to be a half-width transponder, either LF or
HF half of the full channel width.

Ayecka software and hardware versions.

geojohnt@...
 

Hi,

In my quest to sort out my 'reduced' SNR, could someone please tell me what the latest versions of the SR1 software/hardware are?
I'm not sure that would make any difference, anyway.

I have software: V 1.05b264. FPGA V 2.02b022. Hardware V 2.10.
And updated Java recently.

My SR1 was reconfigured for TP 1 HVS around February - but I only process BS.
The SR1 Console Traffic dial jumps up to 71.8 Mbps during a cycle so the data is being 'received.'

I'm still using TelliCast 2.4.4a.
Again that shouldn't effect SNR?

Regards,
John Tellick.






Re: Signal

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

David,

Thanks for the reminder but I've just ordered a fairly expensive satfinder gizmo from Germany with spectrum analyser function.
More info when I get it.

And I have to fill in the EUMETSAT report form.

But from my point of view/location, the considerable increase in SNR I had for several months 'apparently' from the switching off of the V co-channel IP TV transmissions(?) some months ago, has disappeared.

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

John,

The V transponder transmissions should make little difference if the skew on your LNB is correct. The V transmissions come and go all the time. I've attached a list where the changes I spotted are noted.

Note that sometimes it appears to be a half-width transponder, either LF or HF half of the full channel width.

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

Re: Signal

geojohnt@...
 

David,

Thanks for the reminder but I've just ordered a fairly expensive satfinder gizmo from Germany with spectrum analyser function.
More info when I get it.

And I have to fill in the EUMETSAT report form.

But from my point of view/location, the considerable increase in SNR I had for several months 'apparently' from the switching off of the V co-channel IP TV transmissions(?) some months ago, has disappeared.

Regards,
John

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

In a message dated 25/06/2018 15:37:09 GMT Standard Time, gm8arv@... writes:

You could use a spare feed from your LNB, a TBS tuner (e.g second hand
TBS5925), the the excellent CrazyScan software to produce an (admittedly
unscaled) graph of the frequencies across the band or around the two
transponders. For example:

http://www.satsignal.eu/wxsat/dvb-s2/T1-T2.html#h+v

(I don't believe the vertical scaling....).

Re: Signal

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Hello Ian,

Yes, I would put my 'recent' drop in signal as at least 0.5 dB overall.
And I'll hang fire on tweaking the dish again - far too hot down here, the sun is relentless, poor old garden! - though I would like to give the better spec Inverto LNB a second chance.
I should report my comparison findings to Inverto and see what they have to say.

One thing I forgot to mention is that Lyngsat no longer detail data channels so EUMETCast is no longer displayed - or indeed 11.262 GHz.
One can't look for 'interfering' co-channels.

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

You could use a spare feed from your LNB, a TBS tuner (e.g second hand TBS5925), the the excellent CrazyScan software to produce an (admittedly unscaled) graph of the frequencies across the band or around the two transponders. For example:

http://www.satsignal.eu/wxsat/dvb-s2/T1-T2.html#h+v

(I don't believe the vertical scaling....).

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

Re: Signal

geojohnt@...
 

Hello Ian,

Yes, I would put my 'recent' drop in signal as at least 0.5 dB overall.
And I'll hang fire on tweaking the dish again - far too hot down here, the sun is relentless, poor old garden! -  though I would like to give the better spec Inverto LNB a second chance.
I should report my comparison findings to Inverto and see what they have to say.

One thing I forgot to mention is that Lyngsat no longer detail data channels so EUMETCast is no longer displayed - or indeed 11.262 GHz.
One can't look for 'interfering' co-channels.

Regards,
John.

 ++++++++++++++++

In a message dated 24/06/2018 16:52:51 GMT Standard Time, iandeans142@... writes:

I cannot agree with Eumetsat that it might be a local problem as a
number of people have reported changes. I am still seeing a drop of at
least 0.5 SNR in my basic signal and now on my TP2 signal as well,
although I cannot report on TP2 today.

It is looking like some change affecting the satellite may be the issue.
I do not intend to fine tune my dish at the moment, given that others
have signal issues as well. It is a time consuming job on my own.

Re: Signal

Ian Deans
 

On 24/06/2018 12:19, geojohnt via Groups.Io wrote:
Hello Ian,
I'm not sure if you saw my posting 'Mmmm, that's disappointing' on the 21st where I tried a new higher spec Inverto LNB to no avail to try to cure my worsened signal level?
For quite a long period following the switching off of that Russian IP TV service on 11.262 GHz V my SNR on BS was 13.9 to 14.3/4 dB with a corresponding higher Link Margin and fairly steady.
For several weeks now my SNR, as reported earlier, has been very much 'stepping around' up and down between 13.4 and 13.9 dB, with corresponding reduced link margin.
I reported to EUMETSAT and they have asked me to fill in a report form.
But they have said that they have not made any changes to frequency, symbol rate ..... and that I might have a local problem.
This morning 11:15 UT my SNR is 13.4 - 13.5 dB.
Of course, you could fry an egg on the dish (dark grey) or LNB (black housing) in full sun for manyl hours on the patio.
But my average signal has been well down for several weeks now.
Regards,
John
=======================================================================

Hi John,

I saw your posting re your higher spec LNB and the disappointing news that it did not improve your signal level.

I cannot agree with Eumetsat that it might be a local problem as a number of people have reported changes. I am still seeing a drop of at least 0.5 SNR in my basic signal and now on my TP2 signal as well, although I cannot report on TP2 today.

It is looking like some change affecting the satellite may be the issue.
I do not intend to fine tune my dish at the moment, given that others have signal issues as well. It is a time consuming job on my own.

Regards
Ian.

Re: Signal

geojohnt@...
 

Hello Ian,

I'm not sure if you saw my posting 'Mmmm, that's disappointing' on the 21st where I tried a new higher spec Inverto LNB to no avail to try to cure my worsened signal level?

For quite a long period following the switching off of that Russian IP TV service on 11.262 GHz V my SNR on BS was 13.9 to 14.3/4 dB with a corresponding higher Link Margin and fairly steady.

For several weeks now my SNR, as reported earlier, has been very much 'stepping around' up and down between 13.4 and 13.9 dB, with corresponding reduced link margin.

I reported to EUMETSAT and they have asked me to fill in a report form.
But they have said that they have not made any changes to frequency, symbol rate ..... and that I might have a local problem.

This morning 11:15 UT my SNR is 13.4 - 13.5 dB.
Of course, you could fry an egg on the dish (dark grey) or LNB (black housing) in full sun for manyl hours on the patio.

But my average signal has been well down for several weeks now.

Regards,
John





In a message dated 22/06/2018 20:23:22 GMT Standard Time, iandeans142@... writes:


After a recovery in my basic signal from about mid evening yesterday,
the signal has once again dropped to its lower values seen over the last
week or so.
In addition I have also seen a marked drop in my TP2 signal today of
more than 0.5 SNR.
Clearly something on going at the moment, but will just have to monitor.

Regards
Ian.

Signal

Ian Deans
 

After a recovery in my basic signal from about mid evening yesterday, the signal has once again dropped to its lower values seen over the last week or so.
In addition I have also seen a marked drop in my TP2 signal today of more than 0.5 SNR.
Clearly something on going at the moment, but will just have to monitor.

Regards
Ian.

Re: New Africa S2

LaurentD
 

On Thu, Jun 21, 2018 at 02:21 am, David J Taylor wrote:
polarisation: Circular Left Hand.
Hi David,

Thanks for the reminder! I will try tomorrow to change the position of the LNB.

Laurent

Mmmm, that's disappointring.

geojohnt@...
 

Dear All,

Following my reports of lower overall SNR and constant stepping of the SNR level for the last few weeks, I purchased a new 'better' Inverto LNB to try.

It's an Inverto Black Ultra HGLN LNB.
It's Conversion Gain is 60 dB min.
LO Phase Noise -90 dBc/Hz.

The Inverto Black Ultra that I, and many others use is:
Conversion Gain 55 dB min.
LO Phase Noise -85 dBc/Hz.

Both have the same image rejection of 40 dB and cross talk 22 dB.

When I installed the new LNB my SNR was actually lower than with the older LNB!
Rather 'disappointing' - to say the least!

I then shoved the dish further to the west, and realigned it, in case the neighbours fir tree had expanded causing slight shadowing - but no increase in SNR.

Back to the old dish position and old(er) LNB and back to the current status quo.

So, something has definitely changed.
The only other thing I've done recently is chop down a thick old ivy 'bush' on top of a wall opposite the dish but just off line with it - but at about 20 degrees high.
Could that have been blocking some interfering signal?

Gone are the days of a fairly steady SNR between 13.9 and 14.3/4 dB.
Now it jumps around up and down between 13.4 and 13.9 dB.

[1 m dish, Ayecka SR1 'converted' in Jan/Feb this year to receive HVS-1 - but I still only process BS.]

BTW, Amazon UK have the original Inverto Black Ultra single output LNB for £3.50 as an 'ad-on' purchase.
Spend £20 or more on Amazon dispatched goods and get the LNB for £3.50.

Regards,
John.




Re: Processing RGB Fog maps in GeoSatSignal

Hamdan
 

I got a slight improvement in the appearance of fog color after using Night time cloud microphysics RGB and made some changes in color values.

Re: Processing RGB Fog maps in GeoSatSignal

Hamdan
 

Hi Thorsten

Thanks for the information about fog RGB.

Best Regards
Hamdan

Re: Processing RGB Fog maps in GeoSatSignal

Thorsten Miglus
 

Hi Hamdan

Low level clouds (fog) in the fog RGB are not white. They are greenish instead. This is the normal behaviour.
Have a look at the original Eumetsat images:
http://oiswww.eumetsat.org/IPPS/html/MSG/RGB/FOG/index.htm


Cheers,
Thorsten


On Thu, Jun 21, 2018 at 04:32 am, Hamdan wrote:
Hi to all group members,

I want to ask if anyone know how to improve the quality of RGB Fog maps processed in GeoSatSignal because fog color which should appear in white is unclear with the current Offset and Gain values?

Best  regards
Hamdan