Date   
Re: Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)

Dani Glikmanas
 

Hi PAtrick,

I ´d installed the test version but it is not decoding ADS messages. I´ve chcked the version on the TOP of program and it shows MUITIPSK V.4.38.


Best regards,

Dani Glikmanas







De: "Patrick Lindecker" <f6cte@...>
Enviado: segunda-feira, 10 de dezembro de 2018 20:55
Para: multipsk@groups.io
Assunto: [multipsk] Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)


Hello to all,

 

Since the experimental C band 1200 bauds did not work (or very badly), I made a new decoding of this mode based on the Paul's files. I hope that it works now. So, I proposed this test version 2: http://f6cte.free.fr/MULTIPSK_4_38_1_test_version_2.zip for the ones interested by a test of the decoding. The other AERO L bands decoding have been also improved.

 

Paste this address in your Internet Explorer or equivalent. Download the file.
Extract the ZIP file and replace the "official" Multipsk.exe with this test version. Before, make a copy of the "official" Multipsk.exe, in case of. I also added the two updated manuals (French and English).

 

Here an example of decoding (it seems that most of it is relative to plane positions).

 

<10/12/18 22:47:26> Type: 7 (Other "safety") Reference no.: 1 Towards station 43 [Aussaguel --> sat. AOR-E (3-F2)] from plane AB9387:

Complete ACARS message:  Mode: 2 / Plane identifier: N845MH / Ack.: {NAK} / Type: H1 (Uplink or Downlink - Message to/from terminal) / Block: 1 (Downlink)

Message: F49ADL0084#M1B/B6 PIKCPYA.ADS.N845MH07216E2F359C480E9E141D0C101338D208200D2222275555488B85EB22D8378E39088B80105A2E7EC8074E

Flight number: DL84 / IATA destination: PIKCPYA

Plane position:  Lat = 47.0114°  Long = -35.5761°  Alt = 33000 Feet (10058 m)  Time = [H]:32:05

 

73

Patrick




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Re: Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)

Roubinowitz Herve
 

Hi Patrick,

Thank you for this new version.

ICAO PIKCPYA location indicators (Shanwick - Ireland) are used in ATS Interfacility Data Communications (AIDC) messages.
These location indicators are called FIR/OCA addresses (Oceanic Control Aera) or more precisely ADNS addresses (Aeronautical Radio Incorporated Data Network Service).

Les indicateurs de localisation de l'OACI du type PIKCPYA (Shanwick - Irlande) sont utilisés dans les messages AIDC (ATS Interfacility Data Communications).
Ces indicateurs de localisation sont appelés adresses FIR/OCA (Oceanic Control Aera) ou plus précisément adresses ADNS (Aeronautical Radio Incorporated Data Network Service).

73,
Hervé

 

Re: Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)

David Stark
 

Are you running both programs simultaneously?  I don't think VAC can route multiple signals on the same path.

-Dave, NF2G

Re: Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)

Paul Gulliver
 

Hi Patrick,
Sorry, I've had no luck decoding any 1200bps burst signals, I've had Multipsk running for over an hour and nothing. I have Jaero connected to the same VAC and that is decoding messages ok.
I may have something set up incorrectly within Multipsk so I have attached a screenshot of the main window for you to look at - the main config screen is set to "direct via sound card" and the sound card input set to VAC line 3 (same as the Jaero software)

Cheers,

Paul

Re: C band reception diagram for 1200 bauds transmissions reception

Paul Gulliver
 

Hi Patrick,

Yes, that diagram looks good, I agree an LNA is not required. I have around 25 meters of RG6 co-ax between the LNB and the receiver and I've tried adding a LNA and it made no difference to signal reception/decoding.

Cheers,

Paul


On 10/12/2018 at 23:05, Patrick Lindecker <f6cte@...> wrote:

Hello to all and especially to the ones having able to monitor AERO C band,

 

I proposed, in the attached file, a diagram for the reception of 1200 bauds AERO transmissions. Is there errors? I thought to add a “LNA + 1500/1550 MHz filter” between the receiver (RTL-SDR V3) and the LNB, but I think it is useless. Do you confirm?

 

73

Patrick

 

 




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C band reception diagram for 1200 bauds transmissions reception

Patrick Lindecker
 

Hello to all and especially to the ones having able to monitor AERO C band,

 

I proposed, in the attached file, a diagram for the reception of 1200 bauds AERO transmissions. Is there errors? I thought to add a “LNA + 1500/1550 MHz filter” between the receiver (RTL-SDR V3) and the LNB, but I think it is useless. Do you confirm?

 

73

Patrick

 

 




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Multipsk 4.38.1 test version 2 - Improvement of all AERO decoding (C and L bands)

Patrick Lindecker
 

Hello to all,

 

Since the experimental C band 1200 bauds did not work (or very badly), I made a new decoding of this mode based on the Paul’s files. I hope that it works now. So, I proposed this test version 2: http://f6cte.free.fr/MULTIPSK_4_38_1_test_version_2.zip for the ones interested by a test of the decoding. The other AERO L bands decoding have been also improved.

 

Paste this address in your Internet Explorer or equivalent. Download the file.
Extract the ZIP file and replace the “official” Multipsk.exe with this test version. Before, make a copy of the “official” Multipsk.exe, in case of. I also added the two updated manuals (French and English).

 

Here an example of decoding (it seems that most of it is relative to plane positions).

 

<10/12/18 22:47:26> Type: 7 (Other "safety") Reference no.: 1 Towards station 43 [Aussaguel --> sat. AOR-E (3-F2)] from plane AB9387:

Complete ACARS message:  Mode: 2 / Plane identifier: N845MH / Ack.: {NAK} / Type: H1 (Uplink or Downlink - Message to/from terminal) / Block: 1 (Downlink)

Message: F49ADL0084#M1B/B6 PIKCPYA.ADS.N845MH07216E2F359C480E9E141D0C101338D208200D2222275555488B85EB22D8378E39088B80105A2E7EC8074E

Flight number: DL84 / IATA destination: PIKCPYA

Plane position:  Lat = 47.0114°  Long = -35.5761°  Alt = 33000 Feet (10058 m)  Time = [H]:32:05

 

73

Patrick




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Re: L-Band and C-Band aero - My setup

Paul Gulliver
 

Hi Roland,

The mounting kit for the LNB came with the conical scalar kit that is required for off set dishes.


I actually purchased all the Titanium hardware through Amazon.com (U.S. Amazon, it wasn't available from the UK Amazon)

The dish is a standard dish from ebay - nothing special except the cheapest I could find at that size.

If you buy the scalar kit with mount you won't have to worry about buying a prime focus dish - use the dish you already have and you'll be ready to go.

Here is the Amazon link for the scalar kit  https://www.amazon.com/gp/product/B00HVMKXCA

Cheers

Paul


On 10/12/2018 at 20:11, Roland Fechter <fly-fechter@...> wrote:

Thanks very much, Paul !

You are a true expert, congratulations !

Let me ask you the following:

As you show in your  first picture I see there the Titanium LNB - which I just received - exactly the same model- mounted on a small offset dish.

-which I also have. And here is my main problem: a modified LNB holder for the Titanium PLL - just as you show !

Did you make this holder yourself or did you get it from an outside source ? If homemade how did you build it ?

Without a suitable holder fitting onto the holding arm I have only one use for my expensive Titanium - throw it into my trash bin !

Small prime focus dishes allowing the correct durable installation of the Titanium are not available here.

I have an offset 80cm dish  German brand DUR-line, aluminium, its holding arm where the LNB holder sits, is just 4 cm wide.

Thanks in advance for your comments - if you prefer private mail my address:    fly-fechter@...

Regards.

Roland


Am 10.12.2018 um 20:40 schrieb Paul Gulliver:
If anyone is interested I've just added some photos to my flickr site (radio equipment album) of my C-band dish and L-band helical antenna. There is a brief description of my setup under each photo.

https://www.flickr.com/photos/paul-g/albums/72157612058049860

Cheers,
Paul


Re: L-Band and C-Band aero - My setup

Patrick Lindecker
 

Thank you for your interesting album Paul, mixing old and new hardware.

 

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Paul Gulliver
Envoyé : lundi 10 décembre 2018 20:40
À : multipsk@groups.io
Objet : [multipsk] L-Band and C-Band aero - My setup

 

If anyone is interested I've just added some photos to my flickr site (radio equipment album) of my C-band dish and L-band helical antenna. There is a brief description of my setup under each photo.

https://www.flickr.com/photos/paul-g/albums/72157612058049860

Cheers,
Paul




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Re: L-Band and C-Band aero - My setup

Roland Fechter
 

Thanks very much, Paul !

You are a true expert, congratulations !

Let me ask you the following:

As you show in your  first picture I see there the Titanium LNB - which I just received - exactly the same model- mounted on a small offset dish.

-which I also have. And here is my main problem: a modified LNB holder for the Titanium PLL - just as you show !

Did you make this holder yourself or did you get it from an outside source ? If homemade how did you build it ?

Without a suitable holder fitting onto the holding arm I have only one use for my expensive Titanium - throw it into my trash bin !

Small prime focus dishes allowing the correct durable installation of the Titanium are not available here.

I have an offset 80cm dish  German brand DUR-line, aluminium, its holding arm where the LNB holder sits, is just 4 cm wide.

Thanks in advance for your comments - if you prefer private mail my address:    fly-fechter@...

Regards.

Roland


Am 10.12.2018 um 20:40 schrieb Paul Gulliver:

If anyone is interested I've just added some photos to my flickr site (radio equipment album) of my C-band dish and L-band helical antenna. There is a brief description of my setup under each photo.

https://www.flickr.com/photos/paul-g/albums/72157612058049860

Cheers,
Paul

L-Band and C-Band aero - My setup

Paul Gulliver
 

If anyone is interested I've just added some photos to my flickr site (radio equipment album) of my C-band dish and L-band helical antenna. There is a brief description of my setup under each photo.

https://www.flickr.com/photos/paul-g/albums/72157612058049860

Cheers,
Paul

Re: not receiving inmarsat C L-band data #aero

Patrick Lindecker
 

Hello Roland ,

 

>Location of Inmarsat satellite processing L-band data not possible for me at all ! How did YOU succeed ?

You live near Erlangen, which Locator is JN59LO.

If I enter this Locator in the ”Personal data” (“Configuration” menu) and then click on “Satellites”, I get the image is attached file, which gives you azimuth and elevation for the satellites in direct view.

 

The pointing is not critical at all with a patch antenna  (it is enough to be more or less in the good direction).

 

73

Patrick



 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Roland Fechter
Envoyé : lundi 10 décembre 2018 10:51
À : multipsk@groups.io
Objet : [multipsk] not receiving inmarsat C L-band data #aero

 

Hallo,
first thank you very much for all your kind suggestions.
Re bias T use - yes my Funcube has use of bias T ticked - it sends I think 5 V ! - does it really ?
Even when used with a short cable and my English patch antenna - pointed towards SE - my SDRsharp does not detect any signals.
1545 and 1575.4 MHz GPS freq tried.- Sawband of Nooelec added no effect to be seen.
 Dutch RFham design LHCP feed not yet received.
I am afraid it will not be possible for me to attach it and center it correctly on my current 80cm Offset dish.
Alternative would be a small Prime Focus dish of up to 120cm where this feed could fit as it is designed for prime Focus dish use.
Helas - unable to find ANY prime Focus dish at all - if you know supplier kindly pass me its online address.
I resume:
Location of Inmarsat satellite processing L-band data not possible for me at all ! How did YOU succeed ?
Which antenna did YOU use ?
For Funcube users ;
Settings for activating Bias T  ?
I look forward to your comments.
Regards,
Roland
.
:




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Re: not receiving inmarsat C L-band data #aero

Stuart
 

Hi Roland,
 
I have also purchased an L-Band Receive Antenna A154 for 1540 MHz Band from https://www.sdr-kits.net/L-Band-Receive%20Antenna .
The temporary set-up here ...
Antenna magnetically attached to a metal cooking tray! feeding an RTL-SDR v3 with Bias Tee turned on. Then into my desktop running SDR Console and via VAC into Jaero (sorry Patrick).
My window faces west, but with this set-up indoors looking through a double-glazed window I manage to receive some weak signals at 600 and 1200bps from the satellite (3F5) at 54W which JAERO manages to decode.
 
Hopefully with a bit more experimentation you'll suddenly have a Eureka! moment and everything will burst into life.
 
Regards
Stuart
(aviation enthusiast and not an expert of all the intricacies of SDR Console and MultiPSK)
 

Re: not receiving inmarsat C L-band data #aero

Paul Gulliver
 

Roland,
I don't understand why your receive set up is failing, I'll take some of your points in order:

1) Bias T - have you physically checked the voltage is there - with a meter - it should be around 4 to 5 volts
2) if you added the NooElec  LNA it would have blocked the power to the patch - did you add a 2nd voltage supply to the patch? - a 2nd bias tee between the LNA and Patch
3) I don't understand your worries about a prime focus dish - an offset dish is perfectly ok, assuming you have the correct arm to attach the helix to it should be in focus.
In any case you should be getting some sort of signal without a dish.

As for my own setup, I like to experiment so I've built a patch antenna, and a helix antenna - both work ok without a dish. I've made two helix, one right hand for direct use and the other left hand for use with a dish.

The dongle is a RTL-SDR V3 with bias T (switchable using a simple batch file) if I want to add and amplifier.
Sorry, I have no knowledge on the Funcube - the website says software switchable so perhaps there is a command you can send to switch it on?

Cheers,

Paul




On 10/12/2018 at 09:50, Roland Fechter <fly-fechter@...> wrote:
Hallo,
first thank you very much for all your kind suggestions.
Re bias T use - yes my Funcube has use of bias T ticked - it sends I think 5 V ! - does it really ?
Even when used with a short cable and my English patch antenna - pointed towards SE - my SDRsharp does not detect any signals.
1545 and 1575.4 MHz GPS freq tried.- Sawband of Nooelec added no effect to be seen.
 Dutch RFham design LHCP feed not yet received.
I am afraid it will not be possible for me to attach it and center it correctly on my current 80cm Offset dish.
Alternative would be a small Prime Focus dish of up to 120cm where this feed could fit as it is designed for prime Focus dish use.
Helas - unable to find ANY prime Focus dish at all - if you know supplier kindly pass me its online address.
I resume:
Location of Inmarsat satellite processing L-band data not possible for me at all ! How did YOU succeed ?
Which antenna did YOU use ?
For Funcube users ;
Settings for activating Bias T  ?
I look forward to your comments.
Regards,
Roland
.
:

not receiving inmarsat C L-band data #aero

Roland Fechter
 

Hallo,
first thank you very much for all your kind suggestions.
Re bias T use - yes my Funcube has use of bias T ticked - it sends I think 5 V ! - does it really ?
Even when used with a short cable and my English patch antenna - pointed towards SE - my SDRsharp does not detect any signals.
1545 and 1575.4 MHz GPS freq tried.- Sawband of Nooelec added no effect to be seen.
 Dutch RFham design LHCP feed not yet received.
I am afraid it will not be possible for me to attach it and center it correctly on my current 80cm Offset dish.
Alternative would be a small Prime Focus dish of up to 120cm where this feed could fit as it is designed for prime Focus dish use.
Helas - unable to find ANY prime Focus dish at all - if you know supplier kindly pass me its online address.
I resume:
Location of Inmarsat satellite processing L-band data not possible for me at all ! How did YOU succeed ?
Which antenna did YOU use ?
For Funcube users ;
Settings for activating Bias T  ?
I look forward to your comments.
Regards,
Roland
.
:

Re: Wolfphi Link Interface For Windows Tablet

Tony
 

All:

I can confirm that the Wolfphi Link interface works with Windows Surface tablets. It's a compact interface that doesn't require any power so it's handy for portable work. It's designed for Android Smartphones, but it looks like it may work with other devices.

See: http://www.wolphi.com/interface/

Tony -K2MO

MicroHAM USB III Interface and Multipsk

Staf ON6RR
 

Hello Pat,
 
Thank you for all your efforts. Beautifully done.
 
But I stay with my decision not to continue working with Multipsk. It does not work as it should in Windows 10 PRO and with USBIII from Microham.
 
So I also leave "group.io".
 
VY 73,
Staf  ON6RR


S

Re: inmarsat C l-band satellites #aero

Paul Gulliver
 

Roland,

Looking back through your previous posts you mention the A154 patch antenna - is this the item you're using, if so, this also requires a DC power feed (that's how I read the spec on the web site). Just confirm you have two bias tees, one for each device (LNA and Patch) - I don't believe the Nooelec LNA passes the dc through to the input of the device.

Paul

Re: inmarsat C l-band satellites #aero

Paul Gulliver
 

Hi Roland,

If I remember correctly you are in Germany, the best satellite for you would be Alphasat (located at 25 deg East) which gives an approx azimuth of 160 degrees and an elevation of 30 degrees - patch antennas are not too directional.

When I first started on L band I used this patch antenna https://imgur.com/a/hMD86 with these dimensions:
Reflector Size: 170 mm x 170 mm
Patch Size: 98 mm x 98 mm
Corner Trim: 21 mm from top right and bottom left corners
Coax Connection (Probe): 25 mm from bottom edge
Height of patch from reflector: 7 mm

Material I used was copper sheet

It worked reasonably well without any in line amplifier - even from within the house although the signal was stronger outside

Regards

Paul


On 08/12/2018 at 21:00, Roland Fechter <fly-fechter@...> wrote:
Hallo,
Could you please tell me the current and future position -  azimuth & Elevation - of these satellites
here in central Europe. I have been unable to receive any data despite spending much time on my southward facing balcony open also towards the East.
I used a gps patch antenna modified allegedly for the l-band together with my allegedly fine nooelec sawbird lna
with the 1200baud freq on my funcube pro plus dongle. Despite going from a 20m long cable to a 5m long one
not a trace of data were received by me nor the sdrsharp I also used.
Either both the gps antenna plus the sawbird are rubbish or I miss the correct position of these sats altogether.
I still maintain some hope of enjoying Aero within my lifetime thanks to further hints of you experts !
I look forward to these.
Thanks in advance.
Regards,
Roland

Re: inmarsat C l-band satellites #aero

Chris van Lint
 

Hello Roland,

Of course you will be decoding AERO data soon.  All that is needed is a bit of patience.

If you want to "see" where a particular satellite is, I would recommend that you download David Taylor's excellent satellite tracking programme "Wxttrack". https://www.satsignal.eu/software/wxtrack.htm This software is freeware and it allows you to look at the position of any satellite in both real time, as well as any specific time /day you nominate.  Indeed it would be a good idea to use this software to determine a time period during which the satellite moves the least in terms of azimuth and elevation, as this makes pointing easier.

The specifications of the Nooelec Sawbird LNA show that it is ideal for Inmarsat L-Band reception.  How are you feeding power to the LNA (through the coax or direct at the LNA)?  If you feed through the coax, what type of bias-tee are you using on the funcube side?  Is it the correct voltage for the Nooelec LNA.

Are you using the correct polarization.  Using the correct polarization is crucial and if the rotation angle is wrong you may not see a signal. In my case I am using LHCP to decode 4F1 and I use a RHCP patch looking into a 120cm prime focus dish.  (following the principles of optics the signal will be reversed). There is no need to use a dish, it is just that I had one lying around. I have no idea what the aerial polarization of your particular satellite is.  Maybe a member in Europe will be able to tell you.

There are NO AERO ACARS burst transmissions on the L-Band (these are used on the C-Band).
So you are looking at continuous signals around 1.5kHz wide for 600bps, 3.0kHz for 1200 bps and 15kHz for 10500bps.  Make sure you use the correct bps value on the Multipsk side.  The majority of signals are 600bps and 10500bps there are a few 1200bps channels.  (There are also some intermittent 8600bps channels which transmit ground to aircraft voice communications). All channels will transmit data (SUs) when correctly tuned and decoded.  However only some of them will contain ACARS data at any given time.

I have some other ideas to help you get started, but it would perhaps be better to deal with them off-list.

mfg Chris aus Australien.

.At 07:00 AM 9/12/2018, you wrote:

Hallo,
Could you please tell me the current and future position -  azimuth & Elevation - of these satellites
here in central Europe. I have been unable to receive any data despite spending much time on my southward facing balcony open also towards the East.
I used a gps patch antenna modified allegedly for the l-band together with my allegedly fine nooelec sawbird lna
with the 1200baud freq on my funcube pro plus dongle. Despite going from a 20m long cable to a 5m long one
not a trace of data were received by me nor the sdrsharp I also used.
Either both the gps antenna plus the sawbird are rubbish or I miss the correct position of these sats altogether.
I still maintain some hope of enjoying Aero within my lifetime thanks to further hints of you experts !
I look forward to these.
Thanks in advance.
Regards,
Roland