Date   
Re: Missed Packets.

Ernst Lobsiger
 

Douglas


You already are off topic ;-). The 'V' flight configuration reduces "induced drag".
It's aerodynamics of the flock like the never ending wings of open class sailplaines.


Cheers,
Ernst



---In MSG-1@..., <dsdeans@...> wrote :

...

Perhaps their usual 'V' flight configuration is less likely to interfere
than a large contained group.

Better stop before I get into trouble for being off topic !!

Regards,
Douglas.

Re: HVS-2 and RAM-Disk

David J Taylor
 

Hi all,

when experimenting with HVS-2 reception I observed some losses when using a RAM-Disk.
When storing the temp files on an external HDD (USB 3.0) the losses are gone.
This is a surprise. I thought the RAM-Disk has a better Performance?

Cheers,
Thorsten
=================================

Thorsten,

I've seen something similar on HVS-1, and it surprised me as well. I'm not sure I understand why. Part of the reason I'm considering a disk cache rather than a RAMdisk.

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

Re: Missed Packets.

Douglas Deans
 

-----Original Message-----
From: James Brown satellite@... [MSG-1]
Sent: Saturday, February 18, 2017 10:39 AM
To: MSG-1@...
Subject: Re: [MSG-1] Re: Missed Packets.



On 18 Feb 2017, at 10:37, thorsten.miglus@... [MSG-1]
<MSG-1@...> wrote:

29 missed packets on HVS-1 as a flock of geese went over !!
First time I have been able to prove the link.
We can get lots of geese in this part of Perthshire.

Regards,
Douglas.
=================================
Just as well you knew what caused the missed packets, otherwise you might
have gone on a wild goose chase........

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

Nice one James !

When they are migrating North or South and travelling great distances they
tend to be much higher up to catch upper winds etc.
However a lot winter in Scotland in the estuaries (for safety) and fields
for food.
As they move from feeding grounds to feeding grounds they tend to be much
lower as this morning's pass was.
No BS loss and 29 on HVS is virtually nothing so a glancing blow.
Perhaps their usual 'V' flight configuration is less likely to interfere
than a large contained group.

Better stop before I get into trouble for being off topic !!

Regards,
Douglas.

Re: Missed Packets.

James Brown
 

On 18 Feb 2017, at 10:37, thorsten.miglus@... [MSG-1] <MSG-1@...> wrote:

29 missed packets on HVS-1 as a flock of geese went over !!
First time I have been able to prove the link.
We can get lots of geese in this part of Perthshire.

Regards,
Douglas.
=================================
Just as well you knew what caused the missed packets, otherwise you might have gone on a wild goose chase........

Re: Missed Packets.

Thorsten Miglus
 

29 missed packets on HVS-1 as a flock of geese went over !!
First time I have been able to prove the link.
We can get lots of geese in this part of Perthshire.

Regards,
Douglas.
=================================

Douglas,

now I am happy to live in Germany. :-)
To observe a bird bigger than a sparrow is a rare event at my hometown.

Cheers,
Thorsten

Re: Missed Packets.

David J Taylor
 

29 missed packets on HVS-1 as a flock of geese went over !!
First time I have been able to prove the link.
We can get lots of geese in this part of Perthshire.

Regards,
Douglas.
==============================

You need RF-transparent ones!

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

Re: looking for a TBS 5925 USB device

mikeg4cfz
 

Christian, sorry I do not have one available at present I gave my last one away several weeks ago, suggest you try . www.pciex.co.uk http://www.pciex.co.uk , they may have one in stock as they are UK Stockist for TBS Tuners, but remember 5925 has been succeeded by TBS-5927 this has a better Chip/Demodulator. Regards, Mike G4CFZ.

Re: looking for a TBS 5925 USB device

David J Taylor
 

Hi all,

I’m looking for a TBS 5925 USB box.

If someone has one to offer I would be interested.
I tried to order one but they are out of stock at TBS shop?

@Mike: is this temporary or will TBS drop the TBS 5925 USB for the new TBS 5927 USB?
Do you maybe have one remaining you tested and could give away?

Regards,

Christian
====================================

Christian,

Amazon UK:
https://www.amazon.co.uk/gp/offer-listing/B006RQW19E/ref=sr_1_1_olp?ie=UTF8&qid=1487413745&sr=8-1&keywords=TBS5925&condition=new

eBay:
http://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.Xtbs5925.TRS0&_nkw=tbs5925&_sacat=0

I was lucky and got a second-hand one for GBP150 off eBay.

Of course, you could always get an Ayecka SR1:
http://www.geo-web.org.uk/shop.php#MSG

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

Re: Spectrum plots of the first and second EUMETCast transponders

David J Taylor
 

Thanks :)

Modcode selection not change constellation plot.

RFLevel lookup table not calibrated for EARDA NIMs (STB6100/STV090x) which used in TBS 5980/5925/6925. So i use some refrence STm table and levels not correct for this TBS devices.
STV6110/STV090x much better. STV6120/STV0910 also good.
=========================

Thanks, CrazyCat,

If there is any chance of an update for the TBS5925 device that would be helpful, but I appreciate it's not the most recent.

Noted on the constellation - again a "would be nice to have" feature, if possible, as the present plot is a little confusing.

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

Missed Packets.

Douglas Deans
 

29 missed packets on HVS-1 as a flock of geese went over !!
First time I have been able to prove the link.
We can get lots of geese in this part of Perthshire.

Regards,
Douglas.

Re: Looking at HVS-2 TS

David J Taylor
 

CrazyCat

O.K. you also see continuity errors. We had that before: I was chasing packet loss for weeks on my receivers that finally turned out to be a problem in the EUMETCast Uplink chain. But this time EUMETSAT says they see the problems with TBS components (TBS-6908/03 under Windows and GNU/Linux) only while SR1 and Novra S300E routers are said to work fine (not OS specific).

Apart from the Open Source drivers that really do not work under Debian 9 on my machines I had another troubling experience yesterday: Under Debian 7 with Konstantins last TBS driver v160405 an old TBS-6925 showed reception with *NO* MPE packet loss or TEI bits set while I still see periodic IP packet Errors in the TelliCast Clients on Transponder 2 (HVS-2). Again Transponder 1 runs perfect with this setup (BS+HVS-1).

I need some more time to clearly document my results.

Cheers,
Ernst
=======================================

Folks,

Given that transponder 2 is not operating with the same MODCOD as transponder 1, is it likely that once the MODCODs are the same that the problems will just disappear?

CrazyCat - it would be helpful to have a "reset statistics" button so that the errors could be cleared without having to close and restart BDADataEx. Perhaps even a right-click on the Show statistics button to have the option of clearing? Thanks!

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

Re: HVS-2 and RAM-Disk

Thorsten Miglus
 

Thorsten


There is probabably a subtle difference when using RAM disks under Windows. Appearently you can have tmp on RAM disk and received files on another disk (not possible under GNU/Linux). This is easier to setup but it means that the TC client has to copy the files from one partition to the other while if both tmp and received files are on RAM disk the TC client only speedy renames the files using hard links (no data is actually moved).


I *think* the whole potential of RAM-disks can only be seen if the TC client just renames the files as with MVMSG.cmd. It's up to Windows users like you to find out, wheter this makes a difference in packet loss.


Cheers,
Ernst
=================================

Ernst,

tmp and received files were located on the same RAM-Disk. Nevertheless I observed the losses.
My PC is very busy with processing data and storing huge animations on an other RAM-Disk.
It seems to be that under some circumstances the RAM-Disk access is delayed.
The HDD access is obviously not affected.

Cheers,
Thorsten

Re: HVS-2 and RAM-Disk

Ernst Lobsiger
 

Thorsten


There is probabably a subtle difference when using RAM disks under Windows. Appearently you can have tmp on RAM disk and received files on another disk (not possible under GNU/Linux). This is easier to setup but it means that the TC client has to copy the files from one partition to the other while if both tmp and received files are on RAM disk the TC client only speedy renames the files using hard links (no data is actually moved).


I *think* the whole potential of RAM-disks can only be seen if the TC client just renames the files as with MVMSG.cmd. It's up to Windows users like you to find out, wheter this makes a difference in packet loss.


Cheers,
Ernst

---In MSG-1@..., <thorsten.miglus@...> wrote :


Hi all,


when experimenting with HVS-2 reception I observed some losses when using a RAM-Disk.
When storing the temp files on an external HDD (USB 3.0) the losses are gone.
This is a surprise. I thought the RAM-Disk has a better Performance?

Cheers,
Thorsten

looking for a TBS 5925 USB device

Christian Peters
 

Hi all,

I’m looking for a TBS 5925 USB box.

If someone has one to offer I would be interested.
I tried to order one but they are out of stock at TBS shop?

@Mike: is this temporary or will TBS drop the TBS 5925 USB for the new TBS 5927 USB?
Do you maybe have one remaining you tested and could give away?

Regards,

Christian

(BTW. I live in Germany)

HVS-2 and RAM-Disk

Thorsten Miglus
 

Hi all,


when experimenting with HVS-2 reception I observed some losses when using a RAM-Disk.
When storing the temp files on an external HDD (USB 3.0) the losses are gone.
This is a surprise. I thought the RAM-Disk has a better Performance?

Cheers,
Thorsten

Re: Looking at HVS-2 TS

Ernst Lobsiger
 

CrazyCat


O.K. you also see continuity errors. We had that before: I was chasing packet loss for weeks on my receivers that finally turned out to be a problem in the EUMETCast Uplink chain. But this time EUMETSAT says they see the problems with TBS components (TBS-6908/03 under Windows and GNU/Linux) only while SR1 and Novra S300E routers are said to work fine (not OS specific).


Apart from the Open Source drivers that really do not work under Debian 9 on my machines I had another troubling experience yesterday: Under Debian 7 with Konstantins last TBS driver v160405 an old TBS-6925 showed reception with *NO* MPE packet loss or TEI bits set while I still see periodic IP packet Errors in the TelliCast Clients on Transponder 2 (HVS-2). Again Transponder 1 runs perfect with this setup (BS+HVS-1).


I need some more time to clearly document my results.


Cheers,
Ernst



---In MSG-1@..., <crazycat69@...> wrote :

Ernst,

I make continous monitoring T1&T2 and have periodical continous errors on T2.
http://crazycat69.narod.ru/sattelite/DVBDataEx/Eumetcast-BDADataEx-Dual-2.PNG http://crazycat69.narod.ru/sattelite/DVBDataEx/Eumetcast-BDADataEx-Dual-2.PNG

So this problems on Eumetsat side, maybe incorrect settings for MPE-encapsulator.

17.02.2017, 10:28, "ernst.lobsiger@... mailto:ernst.lobsiger@... [MSG-1]" <msg-1@... mailto:msg-1@...>:

Thank you for that. Your software looks very impressive and maybe more EUMETCast users under Windows want to play with it. But bottom left on your screen captures (as far as I understand them) I see that they just show us 26 seconds of T2 and 46 seconds of T1. This is IP and we do possibly not want Errors for hours.
>
> TBS support (Jack Zhang) told me to use their Open Source drivers but results are the same as with yours.

Re: Spectrum plots of the first and second EUMETCast transponders

CrazyCat
 

Thanks :)

Modcode selection not change constellation plot.

RFLevel lookup table not calibrated for EARDA NIMs (STB6100/STV090x) which used in TBS 5980/5925/6925. So i use some refrence STm table and levels not correct for this TBS devices.
STV6110/STV090x much better. STV6120/STV0910 also good.

17.02.2017, 13:50, "'David J Taylor' gm8arv@... [MSG-1]" <msg-1@...>:

Fascinating!

I put up my plots here:

http://www.satsignal.eu/wxsat/dvb-s2/T1-T2.html

I don't know whether it would be helpful if, on the constellation plots, you
could select just one MODCOD or the other for the 11263 transponder, to
produce a slightly less confusing plot.

Perhaps I did something wrong, but the vertical scale on the spectrum plot
doesn't agree with the SNR and other measures. However, I'm using a TBS5925
and not the 6903/6983.....

Very nice software!

Re: Looking at HVS-2 TS

CrazyCat
 

Ernst,

I make continous monitoring T1&T2 and have periodical continous errors on T2.
http://crazycat69.narod.ru/sattelite/DVBDataEx/Eumetcast-BDADataEx-Dual-2.PNG

So this problems on Eumetsat side, maybe incorrect settings for MPE-encapsulator.

17.02.2017, 10:28, "ernst.lobsiger@... [MSG-1]" <msg-1@...>:

Thank you for that. Your software looks very impressive and maybe more EUMETCast users under Windows want to play with it. But bottom left on your screen captures (as far as I understand them) I see that they just show us 26 seconds of T2 and 46 seconds of T1. This is IP and we do possibly not want Errors for hours.

TBS support (Jack Zhang) told me to use their Open Source drivers but results are the same as with yours.

Re: Latitude and Longitude determination Sentinel 3A images

Hugo
 

Peter,

I am using AVG Antivirus and everything is clean on my PC ....:)
The Windows PC is only used for compiling EUMETCastView in Windows. The program is developed in Ubuntu ...


grts,
Hugo

---In MSG-1@..., <diogenes@...> wrote :

Thank you Douglas,
That has cleared that point. I am still
awaiting a response from Avast as to what they think is a problem with
the latest software.
Regards,
Peter

>
>
> -----Original Message-----
>
From:
diogenes@... mailto:diogenes@... [MSG-1]
> Sent: Friday, February 17,
2017 2:06 PM
> To: MSG-1@... mailto:MSG-1@...
> Subject:
Re: [MSG-1] Re: Latitude and Longitude determination Sentinel
> 3A
> images
>
>
>
>
Hello Hugo,
> Thank you for your reply. I am not using your
latest
> version because it upsets Avast who are supposedly
examining it. I am
> using 1.1.9. I have chosen a section had
your software create an image
> but when I hover over any
point on the image I can see no Lat/Long
> data in the bottom
right. Please forgive me if I am overlooking
> something
obvious.
> Regards,
> Peter
>
>
==========================================================
>

> Peter that Lat/Lon readout was added in version 1.2.0
(latest now
> 1.2.2) so
> it is not available in
1.1.9
>
> Regards,
> Douglas.
>
>

Re: Latitude and Longitude determination Sentinel 3A images

David J Taylor
 

Hello Hugo,
Thank you for your reply. I am not using your latest
version because it upsets Avast who are supposedly examining it. I am
using 1.1.9. I have chosen a section had your software create an image
but when I hover over any point on the image I can see no Lat/Long
data in the bottom right. Please forgive me if I am overlooking
something obvious.
Regards,
Peter
=================================

Peter,

Whilst it is wise to check software before use, sometimes certain AV software will declare software "bad" or "dubious" simply because it hasn't seen the software before. In that case, you can get a second opinion using one of the online virus scanners such as:

https://virusscan.jotti.org/
https://www.virustotal.com/

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