Date   

Re: Frequency Control while ISS passing

Patrick Lindecker
 

Thanks for your very nice picture Josef!

 

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Josef Garcia
Envoyé : dimanche 27 décembre 2020 18:34
À : multipsk@groups.io
Objet : Re: [multipsk] Frequency Control while ISS passing

 

Hello all,

 

here is my SSTV picture from this morning over Germany. Antenna: Diamond X50 without LNA and the RX SDRPLAY RSPdx.  With the RTL-SDR V3 the quality was much worse.

 

All the best for 2021 and everyone stay healthy 
Josef
DE3JGA


Re: Expand Aircraft Registration in VDL?

Joe
 

Thanks Mike, downloaded the software, great program! The only issue is that I keep getting a pop up box that says error path/file access error. Any ideas on what could be causing this?


Re: Frequency Control while ISS passing

Patrick Lindecker
 

Thanks for the pictures Tim, the last one is good.

Do you record them in automatic (stand alone worhing)? From Multipsk in SdR or from a FM receiver?

 

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Tim Doe
Envoyé : dimanche 27 décembre 2020 16:47
À : multipsk@groups.io
Objet : Re: [multipsk] Frequency Control while ISS passing

 

 I managed to get a few ok pictures earlier from my sdr play reciever off my home antenna.

Attachments:


Re: Frequency Control while ISS passing

Patrick Lindecker
 

Ralf,

 

Erratum about the FM demodulation (from the manual):

Specificities of SSTV (PD120 or PD180 format) pictures received from the ISS station

It is necessary, at first, to demodulate the FM transmission to be able, afterwards, to decode the SSTV transmission.

FM demodulation (on SdR receiver)

The FM demodulation can be done either by a FM demodulator program connected to Multipsk through a virtual sound card or directly by Multipsk (best solution).
To make Multipsk demodulates FM, click on the button corresponding to your SdR receiver ("FunCube" for exemple), or otherwise on the "Direct interface through the sound card" button. It will be opened a SdR window called "I/Q direct interface via the sound card, for SdR transceivers".

Select the appropriate frequency and gain (maximum, a priori) after having pushed the "Transceiver" button.

For SSTV transmitted by the ISS station, the "FM 25 KHz" option must be selected. When the ISS station is passing over your position, center, on the "SdR" waterfall, the reception on the SSTV transmission, then push the "afc" button. Do in such way that the signal be centered on the SdR waterfall (towards 0 Hz).
SSTV picture must appear.

The displayed "Global level" on the "I/Q direct interface" panel must be sufficient (at least 10 %). Increase the SdR gain if necessary.

To know the pass time over your position or to make the reception automatic, start the Satellites tracking function (see below).

73

Patrick

 

De : Patrick Lindecker [mailto:f6cte@...]
Envoyé : dimanche 27 décembre 2020 15:48
À : 'multipsk@groups.io'
Objet : RE: [multipsk] Frequency Control while ISS passing

 

Hello Ralf,

 

I forgot to update the SATELLITES_FREQUENCIES.TXT file with the ISS. Here is, attached, the new file to save in your Multipsk directory.

Once the satellite visible, the frequency of 144.800 MHz will show on the first button.

 

Tell me if it works. It will be interesting for everyone to see your pictures in PD120 or 180…

 

Note: these transmissions must be received in FM: perhaps “FM x KHz” with 4 KHz adjusted on the “I/Q direct interface…”?

 

Below are some data about the ISS (received from my radio-club):

 

73

Patrick

 

 

Lieu                 : Paris (2.3490  E, 48.8582  N)

Fuseau horaire       : UTC +1:00

P riode de recherche : 2020-12-25 11:27:58 - 3 jours

                       2020-12-28 11:27:58

Conditions           : El vation maximun du soleil = -5 Deg

                       Elevation minimum du sat = 10 Deg

                       Illumination requis

 

Heure               Satellite              Azm Site  Mag Dist. S.Azm S.Sit

--------------------------------------------------------------------------

2020-12-26 05:44:33 ISS                   89.6 21.3  0.2*  994  94.1 -28.2

2020-12-26 05:44:33 ISS                   89.6 21.3  0.2*  994  94.1 -28.2

2020-12-26 05:45:57 ISS                   77.3 10.1  1.1  1505  94.3 -27.9

 

2020-12-26 07:17:31 ISS                  270.9 22.3  0.1*  966 110.4 -13.3

2020-12-26 07:19:30 ISS                  348.2 62.5 -1.3   475 110.8 -13.0

2020-12-26 07:22:51 ISS                   69.6 10.1  1.3  1506 111.4 -12.4

 

2020-12-27 06:31:58 ISS                   20.8 73.7 -1.6*  441 102.4 -20.5

2020-12-27 06:31:58 ISS                   20.8 73.7 -1.6*  441 102.4 -20.5

2020-12-27 06:35:11 ISS                   69.3 10.0  1.2  1509 102.9 -20.0

 

2020-12-27 08:05:31 ISS                  284.8 10.1  1.1  1507 118.8  -6.1

2020-12-27 08:08:50 ISS                    2.8 50.4 -1.0   540 119.4  -5.7

2020-12-27 08:12:08 ISS                   79.9 10.1  1.5  1506 120.0  -5.2

 

2020-12-28 05:46:19 ISS                   71.5 20.2  0.2* 1033  94.1 -28.0

2020-12-28 05:46:19 ISS                   71.5 20.2  0.2* 1033  94.1 -28.0

2020-12-28 05:47:30 ISS                   70.5 10.1  1.1  1506  94.3 -27.8

 

2020-12-28 07:19:17 ISS                  290.2 23.3  0.0*  936 110.5 -13.1

2020-12-28 07:21:05 ISS                  357.4 50.5 -1.1   539 110.8 -12.8

2020-12-28 07:24:24 ISS                   74.9 10.0  1.4  1510 111.4 -12.3

 

 

 

 

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Ralf Bender
Envoyé : dimanche 27 décembre 2020 11:37
À : multipsk@groups.io
Objet : [multipsk] Frequency Control while ISS passing

 

Hello together,
while the ISS is passing in these days, I tried also automatic decode the SSTV pictures with multipsk. But I wonder why multipsk didn't load the Frequency and control it, like it does with other modes.
Did I something wrong?


This are my entries in the SATELLITES_FREQUENCIES.TXT:

//ISS for PD120 or PD180 (SSTV)

ISS (ZARYA) 145.800  

 

ISS 145.800  

 

--
73 Ralf
--
DL0103SWL
DO5RBB
https://www.youtube.com/c/RalfBender/

Attachments:


Re: Frequency Control while ISS passing

Josef Garcia
 

Hello all,
 
here is my SSTV picture from this morning over Germany. Antenna: Diamond X50 without LNA and the RX SDRPLAY RSPdx.  With the RTL-SDR V3 the quality was much worse.
 
All the best for 2021 and everyone stay healthy 
Josef
DE3JGA


Re: Frequency Control while ISS passing

Tim Doe
 

 I managed to get a few ok pictures earlier from my sdr play reciever off my home antenna.


Re: Frequency Control while ISS passing

Patrick Lindecker
 

Hello Ralf,

 

I forgot to update the SATELLITES_FREQUENCIES.TXT file with the ISS. Here is, attached, the new file to save in your Multipsk directory.

Once the satellite visible, the frequency of 144.800 MHz will show on the first button.

 

Tell me if it works. It will be interesting for everyone to see your pictures in PD120 or 180…

 

Note: these transmissions must be received in FM: perhaps “FM x KHz” with 4 KHz adjusted on the “I/Q direct interface…”?

 

Below are some data about the ISS (received from my radio-club):

 

73

Patrick

 

 

Lieu                 : Paris (2.3490  E, 48.8582  N)

Fuseau horaire       : UTC +1:00

P riode de recherche : 2020-12-25 11:27:58 - 3 jours

                       2020-12-28 11:27:58

Conditions           : El vation maximun du soleil = -5 Deg

                       Elevation minimum du sat = 10 Deg

                       Illumination requis

 

Heure               Satellite              Azm Site  Mag Dist. S.Azm S.Sit

--------------------------------------------------------------------------

2020-12-26 05:44:33 ISS                   89.6 21.3  0.2*  994  94.1 -28.2

2020-12-26 05:44:33 ISS                   89.6 21.3  0.2*  994  94.1 -28.2

2020-12-26 05:45:57 ISS                   77.3 10.1  1.1  1505  94.3 -27.9

 

2020-12-26 07:17:31 ISS                  270.9 22.3  0.1*  966 110.4 -13.3

2020-12-26 07:19:30 ISS                  348.2 62.5 -1.3   475 110.8 -13.0

2020-12-26 07:22:51 ISS                   69.6 10.1  1.3  1506 111.4 -12.4

 

2020-12-27 06:31:58 ISS                   20.8 73.7 -1.6*  441 102.4 -20.5

2020-12-27 06:31:58 ISS                   20.8 73.7 -1.6*  441 102.4 -20.5

2020-12-27 06:35:11 ISS                   69.3 10.0  1.2  1509 102.9 -20.0

 

2020-12-27 08:05:31 ISS                  284.8 10.1  1.1  1507 118.8  -6.1

2020-12-27 08:08:50 ISS                    2.8 50.4 -1.0   540 119.4  -5.7

2020-12-27 08:12:08 ISS                   79.9 10.1  1.5  1506 120.0  -5.2

 

2020-12-28 05:46:19 ISS                   71.5 20.2  0.2* 1033  94.1 -28.0

2020-12-28 05:46:19 ISS                   71.5 20.2  0.2* 1033  94.1 -28.0

2020-12-28 05:47:30 ISS                   70.5 10.1  1.1  1506  94.3 -27.8

 

2020-12-28 07:19:17 ISS                  290.2 23.3  0.0*  936 110.5 -13.1

2020-12-28 07:21:05 ISS                  357.4 50.5 -1.1   539 110.8 -12.8

2020-12-28 07:24:24 ISS                   74.9 10.0  1.4  1510 111.4 -12.3

 

 

 

 

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Ralf Bender
Envoyé : dimanche 27 décembre 2020 11:37
À : multipsk@groups.io
Objet : [multipsk] Frequency Control while ISS passing

 

Hello together,
while the ISS is passing in these days, I tried also automatic decode the SSTV pictures with multipsk. But I wonder why multipsk didn't load the Frequency and control it, like it does with other modes.
Did I something wrong?


This are my entries in the SATELLITES_FREQUENCIES.TXT:

//ISS for PD120 or PD180 (SSTV)

ISS (ZARYA) 145.800  

 

ISS 145.800  

 

--
73 Ralf
--
DL0103SWL
DO5RBB
https://www.youtube.com/c/RalfBender/

Attachments:


Re: ISS - SSTV - 27 12 2020

Patrick Lindecker
 

Hello Tiziano,

The slant must be adjusted first for your PC. See the manual for details
(click right over an SSTV button).

73
Patrick

-----Message d'origine-----
De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Tiziano
Gmail
Envoyé : dimanche 27 décembre 2020 11:46
À : multipsk@groups.io
Objet : [multipsk] ISS - SSTV - 27 12 2020

Hello!!

I just get the transmission SSTV from ISS but the result wasn't so good..
(see the picture enclosed..),

Somebody can tell me if I make something wrong on setting the Multipsk
program

Many tk!!

Tiziano - IK3COB -


Re: #Beginner #Beginner

Patrick Lindecker
 

Hello Andy,

 

>VDL is THAT wide ?
Yes its bandwidth is of 25 KHz.

 

>I am wondering if there any new technology for quickly assessing an I/Q recoding for certain digital modes, with ham or utility ?

Yes, I remember having seen that several modes are recognized using a program of artificial intelligence (the same recognizing spoken language), but which one?

 

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Andrew OBrien
Envoyé : dimanche 27 décembre 2020 01:07
À : multipsk@groups.io
Objet : Re: [multipsk] #Beginner

 

why do you need a 25 Khz chunk of spectrum?  VDL is THAT wide ?

Andy 


ISS - SSTV - 27 12 2020

Tiziano Gmail
 

Hello!!

I just get the transmission SSTV from ISS but the result wasn't so good.. (see the picture enclosed..),

Somebody can tell me if I make something wrong on setting the Multipsk program

Many tk!!

Tiziano - IK3COB -


Frequency Control while ISS passing

Ralf Bender
 

Hello together,
while the ISS is passing in these days, I tried also automatic decode the SSTV pictures with multipsk. But I wonder why multipsk didn't load the Frequency and control it, like it does with other modes.
Did I something wrong?


This are my entries in the SATELLITES_FREQUENCIES.TXT:
//ISS for PD120 or PD180 (SSTV)
ISS (ZARYA) 145.800  
 
ISS 145.800  
 
--
73 Ralf
--
DL0103SWL
DO5RBB
https://www.youtube.com/c/RalfBender/


Using Multipsk to retroactively mine an I/Q file ?

Andrew OBrien
 

I know that we can use various software to record a I/Q segment of the spectrum and play it back later. Years ago when it was a new feature in SDR-radio Console I tried it but soon got too tired of weeding through the reading looking for signals. I am wondering if there any new technology for quickly assessing an I/Q recoding for certain digital modes, with ham or utility ? I think Patrick's Reed-Solomon ID's can be detected over a wide piece of spectrum.  
Andy 


Re: #Beginner #Beginner

Andrew OBrien
 

why do you need a 25 Khz chunk of spectrum?  VDL is THAT wide ?

Andy 


Re: Expand Aircraft Registration in VDL?

Joe
 

Thanks for all the help!


Re: Expand Aircraft Registration in VDL?

agene
 

Hi Joe,

Not from within MultiPSK itself, however my freeware add-in package Display-Launcher enables you to display many MultiPSK modes including ACARS, HFDL and VDL on a spreadsheet type grid.

You can find details on my site as under.

Regards, Mike Simpson
South Penrith, NSW, Australia



Re: Expand Aircraft Registration in VDL?

Patrick Lindecker
 

Hello,

 

>there a way to expand the source address from the HEX format to the actual aircraft registration?

Not directly on Multipsk. You must click on “Junzis data” to have data about the plane from the HEX identifier .

 

73

Patrick

 

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Joe
Envoyé : samedi 26 décembre 2020 21:22
À : multipsk@groups.io
Objet : [multipsk] Expand Aircraft Registration in VDL?

 

I am new to the VDL decoder in MultiPSK. IS there a way to expand the source address from the HEX format to the actual aircraft registration? Also for the ground stations?


Expand Aircraft Registration in VDL?

Joe
 

I am new to the VDL decoder in MultiPSK. IS there a way to expand the source address from the HEX format to the actual aircraft registration? Also for the ground stations?


Re: HFDL "errors"

Patrick Lindecker
 

Hello Andrew,

 

Mainly positions are interesting for the users.  Apart to weather messages, the meaning of other messages is unknow (at least for me).

Push the “Expl./Weather” to have some the known explanations.

For more details (about planes for example), note that the HFDL-Display utility (freeware) by Mike Simpson may be of use to MultiPSK users. This one, in interface with Multipsk, displays details of the aircraft heard, current freqs in use etc. Interested users can get details then download the program at the WEB address:
http://www.agenetools.com/downloads/Display-Launcher.pdf

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Andrew OBrien
Envoyé : vendredi 25 décembre 2020 17:15
À : multipsk@groups.io
Objet : [multipsk] HFDL "errors"

 

I decided to monitor some HFDL traffic today.  What is the following telling me ?

<300 bps 1.8 sec 1441 Hz>    12/25/2020 16:11:35MPDU CRC control: error

<End frame>

 

<300 bps 1.8 sec 1444 Hz>    12/25/2020 16:11:52

MPDU CRC control: OK

MPDU (Media access control Protocol Data Unit) - Uplink

LPDU CRC control: OK

[Unnumbered Data LPDU] [Enveloped Data HFNPDU] 

<SOH>2.N123FE6_<DEL>D<ETX>S`<DEL>

<End frame>

 

<300 bps 1.8 sec 1440 Hz>    12/25/2020 16:12:02

MPDU CRC control: OK

MPDU (Media access control Protocol Data Unit) - Downlink

LPDU CRC control: OK

[Unnumbered Acknowledged Data LPDU] [Enveloped Data HFNPDU] 

<SOH>2.N123FE<NAK>SA7<STX>M82AFX00000EH1611532SH<ETX><ACK>3<DEL>

<End frame>

 

<300 bps 1.8 sec 1443 Hz>    12/25/2020 16:12:07

SPDU CRC control: OK

SPDU (Squitter Protocol Data Unit)

<End frame>

 


HFDL "errors"

Andrew OBrien
 

I decided to monitor some HFDL traffic today.  What is the following telling me ?


<300 bps 1.8 sec 1441 Hz>    12/25/2020 16:11:35MPDU CRC control: error
<End frame>
 
<300 bps 1.8 sec 1444 Hz>    12/25/2020 16:11:52
MPDU CRC control: OK
MPDU (Media access control Protocol Data Unit) - Uplink
LPDU CRC control: OK
[Unnumbered Data LPDU] [Enveloped Data HFNPDU] 
<SOH>2.N123FE6_<DEL>D<ETX>S`<DEL>
<End frame>
 
<300 bps 1.8 sec 1440 Hz>    12/25/2020 16:12:02
MPDU CRC control: OK
MPDU (Media access control Protocol Data Unit) - Downlink
LPDU CRC control: OK
[Unnumbered Acknowledged Data LPDU] [Enveloped Data HFNPDU] 
<SOH>2.N123FE<NAK>SA7<STX>M82AFX00000EH1611532SH<ETX><ACK>3<DEL>
<End frame>
 
<300 bps 1.8 sec 1443 Hz>    12/25/2020 16:12:07
SPDU CRC control: OK
SPDU (Squitter Protocol Data Unit)
<End frame>
 


Re: LRPT Laboratory Bandwidth testing

Patrick Lindecker
 

Hello Fred,

 

>Question, In the I/Q mode is the Global Level relevant?   It did not go above 2% for this pass.  I did not correct
>the RSP gain at all.

In principle, weak signal can pose a problem if the digital noise is relatively high. For example, I remember that for old 16 bits sound cards, only 13 or 14 bits could really be used. So in that case very weak signals were mixed with a drop of noise.

 

I have not tested my RSP1A but Multipsk only uses the first 8 bits of the 10 or 12 bits possible, so I suppose that these 8 bits are surely “clean”. 2% of level means that you work with about 2 bits. It’s not ideal but it is not so bad, seeing your nice images.

 

Under DOS, there were decoders working with one bit and they worked well…

 

73

Patrick

 

De : multipsk@groups.io [mailto:multipsk@groups.io] De la part de Fred Albertson
Envoyé : mardi 22 décembre 2020 14:22
À : multipsk@groups.io
Objet : [multipsk] LRPT Laboratory Bandwidth testing

 

Hi Patrick,

This morning, on a medium quality pass, I used the RSP with no filters or amps. Again I used the 120kHz filter which
does not seem to affect the picture quality at all.  One thing I note is that the picture lines are more consistent
between the frames.

Question, In the I/Q mode is the Global Level relevant?   It did not go above 2% for this pass.  I did not correct
the RSP gain at all.

64                                                                               65                                                                             68


Great day,

Fred

401 - 420 of 4519