Am 17.11.2020 um 17:19 schrieb john.haslam4 via groups.io <john.haslam4@...>:

This inspired me to create a composite night_test  which uses M12 Blue, M14 Green and M15 Red

night_test:

    compositor: !!python/name:satpy.composites.GenericCompositor

    prerequisites:

    - M15

    - M14

    - M12

    standard_name: night_test

The cold cloud tops come out dark so I inverted the image in Paint Shop to get a result similar to using Hugo's EUMETCASTView for these channels

Ferdinand,

I'am really a scientist but I have worked as a teacher most of the time.
Therefore it's nice to see you arrived at chapter 8.) of my text already:

8) Where do we go from here
-------------------------------------
...
What composites need what instrument channels? Find answers here:
C:\users\username\miniconda3\envs\pytroll\Lib\site-packages\satpy\etc\composites
...
For almost every RGB composite there are interesting short "Guides" like the one I attached.
You find them all in directory "Guides" of Diego Souzas SHOWCast program suite which under
the hood actually uses Pytroll/Satpy for image processing. You find SHOWCast here:

https://geonetcast.wordpress.com/2020/07/08/new-showcast-release-v-2-0-0/

My 2.0 version is still on the TODO list. I have to ready my garden (jungle) for the looming winter.

Best regards
Ernst

On Sun, Nov 8, 2020 at 11:10 AM, Ferdinand Valk wrote:

Noaa_20:                          segdir = "F:/MSG/Images/VIIRS" + "/" + Yea + "/" + Mon + "/" + Day

Suomi_NPP:                     segdir = "J:/EUMETCast/received/hvs-1/E1H-RDS-1" + "/"

 

So it seems that the end of the second line should exclude the last “/”. That would indeed explain exactly what you indicated. Syntax issue.

Ferdinand,

I always use directories without a final "/". The line "files = glob(segdir + "/" + SVMC_npp_d ....*.h5) actually got a "//" but it seems glob()
-- that is similar to "dir" in Windows or "ls"  under GNU/Linux -- did its job anyway but returned the path and filenames with one "/" only!
But as explained offset was and remained 1 too much. What you did is "learning by doing" and that's what PyTROLL/Satpy is all about ...

Cheers,
Ernst

Ferdinand

The line probably refers to:

        dt = datetime(int(Yea), int(Mon), int(Day), int(Hou), int(Min),
                      int(Sec)) + timedelta(seconds = 43)

Which is actually

        dt = datetime(int(Yea), int(Mon), int(Day), int(Hou), int(Min), int(Sec)) + timedelta(seconds = 43)

if written on one line.

The claim is that Sec is not in range 0..59  which means it's not properly taken from a filename
(or the above line is damaged somehow?). You can try to debug it the old way using print ():

...
    Hou = files[n][offset+20:offset+22]
    Min = files[n][offset+22:offset+24]
    Sec = files[n][offset+24:offset+26]
    print ("-------->", Hou, Min, Sec)
...
You can also try to print the filelist files if you see different behaviour on different days.
...
# Glob by date, assume that interesting segments are all after midnigt
files = glob(segdir + "/" + "SVMC_npp_d" + Yea + Mon + Day + "*.h5")
print ("-------->", files)


Or you can attach the script and the printed files to your reply if you cannot nail it down.

Regards
Ernst

Am 08.11.2020 um 12:52 schrieb David J Taylor GM8ARV 🏴󠁧󠁢󠁳󠁣󠁴󠁿 🇪🇺 via groups.io <david-taylor=blueyonder.co.uk@groups.io>:

i Christian

Wow - I love those images

Is it possible for you to send me the code you use to get those images so that I can try it in my files

Regards

Graham
===========================

You should also be able to make similar images with GeoSatSignal, of course, using background mode.

Cheers,
David
--
SatSignal Software - Quality software for you
Web: https://www.satsignal.eu
Email: david-taylor@blueyonder.co.uk
Twitter: @gm8arv

Alan and Peter,

I agree with Alan 'you' really need to see 'a meter' at the dish when you are adjusting it.

I use TeamViewer between my computer and mobile phone.

Using an SR1 for EUMETCast I can relay the three SR1 readout dials enlarged on the phone screen.

Beware Peter, if my dish is not aligned to 10 A but a same frequency and polarisation transponder on another satellite, the meter will indicate good SNR and Power - but no data present on the Traffic dial.

So it is easy to be mislead(?) by a close-by satellite.

Eutelsat 9 B does not have a transponder on EUMETCast TP 1 so that is not a problem.

Mind you, if your dish was aligned to 9 B you are almost there anyway.

So, if the TBS setup window also shows data flow then that is an aid.

Regards,

John.

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

-----Original Message-----

From: Alan Sewards <alan@...>

To: MSG-1@groups.io

Sent: Fri, 6 Nov 2020 17:58

Subject: Re: [MSG-1] TBS 6903 Signal Display

Hi folks,

    I use the TBS software and have for many years with no problems. To line up dishes, use the value shown for SNR in the boxes under the two-line coloured display. This responds in a most sensitive manner to antenna movements. BUT you have to be able to see the value shown as you adjust the dish. It is almost impossible to do with someone repeating the value over a phone or listening to the voiceover spoken by the card. The line showing Quality also responds but is almost full-screen and small changes are not easy to see and impossible to report!.

Signal strength is mainly noise from the amplifiers and does not respond to signal to noise ratio. If the interfering transponder with the transponder carrying the basic service is on,, my SNR is about 11.4dB, if it is off (rare!) it goes up to 13.6 dB. in other words, when off, I can receive HVS, when on, I am limited to the basic service.This just about matches well with calculations.

Best of luck!

Alan S

On 06-Nov-20 12:59 PM, David J Taylor GM8ARV 🏴 🇪🇺 via groups.io wrote:

Hello all, I am trying, once more, to set up my dish and I am using the signal strength indicator in the TBS control panel. The level sits at 49% and then suddenly jumps up to 98% sits there for a while then moves back down again. I am monitoring two seperate connections from the lnb to the card and both move in unison. I have tried a different lnb with similar results. Does anyone know quite what the card is measuring when it says signal strength? Will this include noise or is it the pure satellite signal?

Regards, Peter

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

Peter,

The TBS software never worked properly for me.  Try using BDADataEx instead (you can likely still use the TBS afterwards).  If the TBS reports dB rather then some meaningless percentage, use that.  Remember it the best SNR you need, not necessarily the strongest signal.  Maybe "quality" in TBS-speak?

Cheers,

David

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