Date   
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

Processing RGB Fog maps in GeoSatSignal

Hamdan
 

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


Re: New Africa S2

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Hi Kobus,

I'm trying to receive any signal from Eutelsat 8°W on C-Band this week from Mauritius Island with a 3,70m antenna.
Even with a Satfinder, the pointing is not good with these parameters:
Freq: 3848 Mhz
Symbol rate: 9892 Ks/S
Polarization: Horizontal
Do you know how did you find the solution?

Thanks in advance for your help.

Laurent
==============================

Laurent,

Did you check the EUMETSAT Web page:

https://www.eumetsat.int/website/home/TechnicalBulletins/EUMETCast/DAT_3589215.html

It says: polarisation: Circular Left Hand. But Kobus should know if that's correct, or not.

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

Re: New Africa S2

LaurentD
 

Hi Kobus,

I'm trying to receive any signal from Eutelsat 8°W on C-Band this week from Mauritius Island with a 3,70m antenna.
Even with a Satfinder, the pointing is not good with these parameters:
Freq: 3848 Mhz
Symbol rate: 9892 Ks/S
Polarization: Horizontal
Do you know how did you find the solution?

Thanks in advance for your help.

Laurent

Sentinel 3A and 3B.

Douglas Deans
 

Interesting article from ESA about the tandem flying of Sentinels 3A and 3B for four months. Please see:-

http://www.esa.int/Our_Activities/Observing_the_Earth/Copernicus/Sentinel-3/Sentinel-3_flies_tandem

Regards,
Douglas.

R: R: [MSG-1] Ayecka sr1 bs e hvs

Stefano Mina
 

David your observation and right, in order to create a redundant reserve system, for future transponder developments

Thank you so much for your time!

Stephen

-----Messaggio originale-----
Da: MSG-1@groups.io <MSG-1@groups.io> Per conto di David J Taylor via Groups.Io
Inviato: martedì 19 giugno 2018 18:21
A: MSG-1@groups.io
Oggetto: Re: R: [MSG-1] Ayecka sr1 bs e hvs

Thanks David, very clear and exhaustive explanation. With two PCs in separate reception, they evaluated the best soluxion, PCI card, or external usb.

Thank you!
================================

Stefano,

Just my view, but if the first PC has the Ayecka SR1, which is already receiving BS correctly, perhaps, if possible, the second PC should have the dual-input TBS6903 PCie card so that you can then receive all three services separately. You never know what might be added to HVS-2, or whether there will be another transponder with HVS-3 in the future carrying data you want.

Glad to have helped.

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

Re: R: [MSG-1] Ayecka sr1 bs e hvs

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Thanks David, very clear and exhaustive explanation. With two PCs in separate reception, they evaluated the best soluxion, PCI card, or external usb.

Thank you!
================================

Stefano,

Just my view, but if the first PC has the Ayecka SR1, which is already receiving BS correctly, perhaps, if possible, the second PC should have the dual-input TBS6903 PCie card so that you can then receive all three services separately. You never know what might be added to HVS-2, or whether there will be another transponder with HVS-3 in the future carrying data you want.

Glad to have helped.

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

R: [MSG-1] Ayecka sr1 bs e hvs

Stefano Mina
 

Thanks David, very clear and exhaustive explanation. With two PCs in separate reception, they evaluated the best soluxion, PCI card, or external usb.

Thank you!

-----Messaggio originale-----
Da: MSG-1@groups.io <MSG-1@groups.io> Per conto di David J Taylor via Groups.Io
Inviato: martedì 19 giugno 2018 17:19
A: MSG-1@groups.io
Oggetto: Re: [MSG-1] Ayecka sr1 bs e hvs

Good morning. In view of the change of service transponders va16 and nooa 20 on tp1 A question to who in use Ayecka sr1 Is it possible to use the receiver for bs and hvs without data loss on Bs? It is advised to have separate receivers for each service without having to act on the link margin Thresholds?

Thank you
Stephen
=================================

Stephen,

Basically, no. A low link margin on the HVS-1 can disturb the reception of the BS. However....

If your SNR is good enough, say 14 dB or more, the disturbances to the HVS due to low signal may occur for a sufficiently infrequently that the interruptions to the BS are acceptable. It's one of those "how long is a piece of string" questions. You have to judge whether the price of the second receiver justifies the extra availability of the BS data.

The second receiver doesn't have to be an Ayecka SR1. I picked up a second-hand TSB5925 USB receiver for GBP £150. You then need to decide which receiver works better for which service. You could even use a dual-tuner TBS6903 card (to be installed inside your PC, US $300) connected via a splitter with DC isolation on one port so that your existing SR1 controls the LNB polarity and frequency, and the dual-tuner card receives both the HVS-1 and HVS-2 streams. That's a lot of data, though.

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

Re: Ayecka sr1 bs e hvs

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

Good morning. In view of the change of service transponders va16 and nooa 20 on tp1 A question to who in use Ayecka sr1 Is it possible to use the receiver for bs and hvs without data loss on Bs? It is advised to have separate receivers for each service without having to act on the link margin Thresholds?

Thank you
Stephen
=================================

Stephen,

Basically, no. A low link margin on the HVS-1 can disturb the reception of the BS. However....

If your SNR is good enough, say 14 dB or more, the disturbances to the HVS due to low signal may occur for a sufficiently infrequently that the interruptions to the BS are acceptable. It's one of those "how long is a piece of string" questions. You have to judge whether the price of the second receiver justifies the extra availability of the BS data.

The second receiver doesn't have to be an Ayecka SR1. I picked up a second-hand TSB5925 USB receiver for GBP £150. You then need to decide which receiver works better for which service. You could even use a dual-tuner TBS6903 card (to be installed inside your PC, US $300) connected via a splitter with DC isolation on one port so that your existing SR1 controls the LNB polarity and frequency, and the dual-tuner card receives both the HVS-1 and HVS-2 streams. That's a lot of data, though.

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

Re: GOES16

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

On 19/06/2018 15:48, James Brown wrote:
To save me tearing more hair - am I right that during the current suspension of Sentinal 3A GOES16 Trial dissemination is also suspended?

Cheers
James
Seems to have returned even as I wrote!!
Cheers
James
===========================

It knew you were questioning its dissemination!

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

Re: Signal

geojohnt@...
 

Ian,

I think you are doing very well 'up there' with 13.8 - to 14.00 from a 1.1 m dish at 'best time.'

I note what David has said regarding what mode the TP 1 transponder might be in, but when I realigned my dish a couple of months ago and got back to my usual 13.9 - to 14.3 dB SNR (mostly above 14.0) which lasted several weeks - if the mode was changing then, it wasn't noticeable.

Something has happened recently in that my usual level of SNR is down quite a bit and I see more stepping of 13.8 to 13.5 and/or vice versa than with my previously higher and fairly steady signal.
And I never see 'best signal'  figures of 14.3 - 14.4 dB anymore.

Regards,
John.

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

In a message dated 18/06/2018 10:33:40 GMT Standard Time, iandeans142@... writes:

TP1 signal does vary by about 0.7 SNR over a full day with the
best signal ( 13.8 / 14.00 ) overnight, probably due to my northerly
location. I am using a 1.1 metre dish.

Re: GOES16

James Brown
 

On 19/06/2018 15:48, James Brown wrote:
To save me tearing more hair - am I right that during the current suspension of Sentinal 3A GOES16 Trial dissemination is also suspended?

Cheers
James
Seems to have returned even as I wrote!!
Cheers
James

GOES16

James Brown
 

To save me tearing more hair - am I right that during the current suspension of Sentinal 3A GOES16 Trial dissemination is also suspended?

Cheers
James

Ayecka sr1 bs e hvs

Stefano Mina
 

Good morning. In view of the change of service transponders va16 and nooa 20 on tp1 A question to who in use Ayecka sr1 Is it possible to use the receiver for bs and hvs without data loss on Bs? It is advised to have separate receivers for each service without having to act on the link margin Thresholds?

Thank you
Stephen

Processing Sentinel data (was:Re: [MSG-1] HVS-2)

David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺
 

David, could you please expand a little on this comment you made?
Regards, Peter
=====================================

Peter,

Please see:

https://scihub.copernicus.eu/

From that page:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The Copernicus Open Access Hub (previously known as Sentinels Scientific Data Hub) provides complete, free and open access to Sentinel-1, Sentinel-2 and Sentinel-3 user products, starting from the In-Orbit Commissioning Review (IOCR).

Open Access Hub : access point for all Sentinel missions with access to the interactive graphical user interface.

API Hub : access point for API users with no graphical interface. All API users regularly downloading the latest data are encouraged to use this access point for a better performance.

Sentinel-3A Pre-operational Hub : pre-operational access point for all users to Sentinel-3 L1 and L2 Land data. Login credentials are s3guest:s3guest .

Sentinels GNSS Rinex Pre-operational Hub : pre-operational access point for all users to the GNSS L1b products in Rinex format of all the Sentinel platforms in operations. Login credentials are gnssguest:gnssguest
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

There are a number of such sites perhaps folks might like to say which one they find the best. One chap who does some interesting and helpful image processing and channel combinations is Pierre Markuse

https://pierre-markuse.net/

I believe his tools are free-of-charge, but I've not used that site myself. As with many folks involved in the Copernicus/Sentinel data he is on Twitter:

https://twitter.com/Pierre_Markuse

I have some information about my own processing of Internet-sourced Sentinel 2A data here:

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

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

Re: HVS-2

diogenes1@...
 

David, could you please expand a little on this comment you made?
Regards, Peter



>
> I haven't looked at Sentinel data for a while, to be honest, and mot
> likely  I would use an Internet service now that such good processing
> algorithms are > available free of charge.

Re: HVS-2

Douglas Deans
 

On 19/06/2018 10:06, James Brown wrote:
On 18/06/2018 16:26, Douglas Deans via Groups.Io wrote:
One input OF MY TBS 6903 is handling the new S3A data and the existing data very well on the HVS-2 service.
So S3A ERR and EFR, NOAA 20 VIIRS M and DNB, and GOES 16 ABI and GLM sometimes simultaneously without loss.
Bodes well for S3B being added and NOAA 20 and GOES 16 going to HVS-1 (on the other 6903 input).


Regards,
Douglas.
I haven't seen a corresponding update on the transfer of GOES16 & NOAA20 data yet - I guess that info should be coming soon.
Cheers
James
==========================================================================

James the timings of the change for NOAA 20 and GOES 16 are on the same announcement :-

https://www.eumetsat.int/website/home/News/DAT_3942692.html

So parallel operation for NOAA 20 and GOES 16 will start on 22nd August and by 11th September those services will only be available on HVS-1.

I assume the only name change will be the prefix from E2H to E1H

Regards,
Douglas.