Date   

Re: Weather Satellite Operation

David J Taylor
 

On 25/08/2022 14:59, llsteen via groups.io wrote:
Elad S2 is a much better receiver than Airspy etc. Much better, it can even be
compared to some of the more costly Winradios.
Regards Lars
Lars,

When you say "Airspy", which do you find to be the best of the Airspy family?
My experience is that the Airspy Discovery HF+ is pretty good...

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


Account Change

Simon Brown
 

Every time I send an email through this list I get a bounce from polgarjozsef@... as below, so I've changed the list delivery for this user to digest.

<polgarjozsef@...>: host mail.microweb.hu[185.51.65.34] said: 550
    5.7.23 <polgarjozsef@...>: Recipient address rejected: Message
    rejected due to: SPF fail - not authorized. Please see
    http://www.openspf.net/Why?s=mfrom;id=simon@...;ip=195.228.245.79;r=<UNKNOWN>
    (in reply to RCPT TO command)


--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: Afedri AFE822X dual channel Diversity/phasing support?

Simon Brown
 

Some hardware teams expect a great deal from the software developers in return for free hardware. I could spend at least two months supporting 2 / 4 channel SDRs, this is a lot of work  and the end result is maybe $50 in donations (if that) while the hardware team makes the money without providing support.

I have many areas of DSP and UI I want to look at, when I next get a free week I will work out the design for a good DAB receiver as I want to master OFDM, knowledge I can use elsewhere.


From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of potty.dzmeia via groups.io <potty.dzmeia@...>
Sent: 24 August 2022 10:59
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Afedri AFE822X dual channel Diversity/phasing support?
 

[Edited Message Follows]

Hi Simon,

FYI, I am including a link to a post that describes what has been done by oh7aeg (using 4 channel Afedri): https://github.com/AlexandreRouma/SDRPlusPlus/discussions/585
Me personally, I am interested in stereo diversity reception but it seems there are multiple applications of having a coherent multi-channel receivers.
Of course, one can't do everything at once, but at least something to keep in mind when beginning to implement multi-channel support.

Cheers,
Chav/lz1abc

P.S. More hints below:
- Link to a pdf with additional description from oh7aeg: https://www.oh3ad.fi/wp-content/uploads/2022/07/Vaiheohjattu2.pdf
- Screenshot from the pdf showing how he implemented beam switching in "SDR Network Control Box"
ScreenShot

--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: Weather Satellite Operation

llsteen@...
 

Elad S2 is a much better receiver than Airspy etc. Much better, it can even be compared to some of the more costly Winradios. 
Regards Lars


Re: Weather Satellite Operation

David L. Wilson
 

The NOAA polar orbital satellites are easily heard with any of the receivers you have listed with any antenna. You are doing something wrong or have some problem.
--
David L. Wilson


Re: Very high CPU load with the AirSpy mini #airspy

Simon Brown
 

  1. Post a screenshot.
  2. You have quite an old CPU - 2 cores, 4 threads Intel® Core™ m3-6Y30 Processor.
  3. What was the CPU load with a previous kit?

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Alex DH2ID via groups.io <dh2id@...>
Sent: 25 August 2022 08:10
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: [SDR-Radio] Very high CPU load with the AirSpy mini #airspy #airspy
 
Hi, I've noticed a cpu load of over 80% using my AirSpy mini with the newest console beta running under Win10 64bit on my ASUS ZenBook UX305CA. Any ideas, how to minimize CPU load? 

--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: Weather Satellite Operation

David J Taylor
 

On 25/08/2022 07:45, George Stein - NJ3H via groups.io wrote:
To be honest, I was hoping to dedicate my Airspy R2 to weather satellite
duties.  As mentioned above, this is not looking good.  So any ideas and
comments to the items raised in this message will be greatly appreciated.

Regards,
George
Why not use that Raspberry Pi you have sitting in a drawer?

https://www.instructables.com/Raspberry-Pi-NOAA-Weather-Satellite-Receiver/

and later:

https://github.com/jekhokie/raspberry-noaa-v2

All automated, and you make the Raspberry Pi share the images to your Windows
PC, if you like.

Keep you SDR Console for general use...

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


Re: Very high CPU load with the AirSpy mini #airspy

jdow
 

Turn off features. Shrink the display windows for spectrum and waterfall. Go to a lower resolution spectrum/waterfall. Set their update rate slower.

{^_^}

On 20220825 00:10:58, Alex DH2ID wrote:

Hi, I've noticed a cpu load of over 80% using my AirSpy mini with the newest console beta running under Win10 64bit on my ASUS ZenBook UX305CA. Any ideas, how to minimize CPU load? 


Re: Weather Satellite Operation

Alan G4ZFQ
 

On 25/08/2022 06:45, George Stein - NJ3H via groups.io wrote:
The best reception I have is with SDRC and the Elad S2. When I use
my Airspy R2, HF+ discovery, or RSPdx with SDRC or their native software, there is basically no reception.

Maybe the Elad is the only one that is not overwhelmed by strong broadcast signals?
I find a filter to be useful on many receivers.

73 Alan G4ZFQ


Re: Weather Satellite Operation

George Stein - NJ3H
 

Hello Gert, 
Yes I do gave 40 KHz set for each receiver. I am glad you have a setup that works well for you. 

Thank you for your message. 

Regards, 
George 


On Thu, Aug 25, 2022 at 12:20 AM, Gert Gremmen
<cetest@...> wrote:

Hi George

Just a simple suggestion question : are all bandwidths set to the same value (35-40 kHz) ? Check by noise floor level. Must be the same.

You will probably get not much of a benefit with an preamp, unless if used for cable length compensation.

Most important is a good antenna, high placed (i build a helix) because of ground reflection nulls.

I used the dedicated receiver from EMGO of which i replaced the input circuit by a helical tuned circuit with a BF981.

The excellent selectivity got me rid of the all kind of interference from the airbands,

without notable loss of signal quality  (the helix add -6 dB of loss).

Gert

On 25-8-2022 8:45, George Stein - NJ3H via groups.io wrote:
Greetings,

I am having a strange happening in trying to listen to the NOAA weather satellites.

The best reception I have is with SDRC and the Elad S2.  When I use my Airspy R2, HF+ discovery, or RSPdx with SDRC or their native software, there is basically no reception.  Is the Elad that much better than the other receivers.  I am surprised that I am seeing such a disparity in signal strengths.

My antenna is a circular dipole from Stellar designed for the FM broadcast band. I am using this very non-perfect antenna until I buy a QFH antenna and a preamp.

Any ideas as to why the other radios seem to be a disappointment?

Another question: The Orbitron/WXtoIMG software can create a list of upcoming passes for the satellites that the user wants to select (days into the future).  This then allows unattended operation for decoding upcoming passes.  Is there a similar capability within SDRC to create such a list, feed it to WXtoIMG, allowing unattended decoding?  In other words, this would eliminate the need for Orbitron and use the satellite module within SDRC to handle this function.

I very much like the satellite module that Simon has developed.  Being able to use it as described above would free up one program.

To be honest, I was hoping to dedicate my Airspy R2 to weather satellite duties.  As mentioned above, this is not looking good.  So any ideas and comments to the items raised in this message will be greatly appreciated.

Regards,
George -- Independent Expert on CE marking EMC Consultant Electrical Safety Consultant


Re: Weather Satellite Operation

Gert Gremmen
 

Hi George

Just a simple suggestion question : are all bandwidths set to the same value (35-40 kHz) ? Check by noise floor level. Must be the same.

You will probably get not much of a benefit with an preamp, unless if used for cable length compensation.

Most important is a good antenna, high placed (i build a helix) because of ground reflection nulls.

I used the dedicated receiver from EMGO of which i replaced the input circuit by a helical tuned circuit with a BF981.

The excellent selectivity got me rid of the all kind of interference from the airbands,

without notable loss of signal quality  (the helix add -6 dB of loss).

Gert

On 25-8-2022 8:45, George Stein - NJ3H via groups.io wrote:
Greetings,

I am having a strange happening in trying to listen to the NOAA weather satellites.

The best reception I have is with SDRC and the Elad S2.  When I use my Airspy R2, HF+ discovery, or RSPdx with SDRC or their native software, there is basically no reception.  Is the Elad that much better than the other receivers.  I am surprised that I am seeing such a disparity in signal strengths.

My antenna is a circular dipole from Stellar designed for the FM broadcast band. I am using this very non-perfect antenna until I buy a QFH antenna and a preamp.

Any ideas as to why the other radios seem to be a disappointment?

Another question: The Orbitron/WXtoIMG software can create a list of upcoming passes for the satellites that the user wants to select (days into the future).  This then allows unattended operation for decoding upcoming passes.  Is there a similar capability within SDRC to create such a list, feed it to WXtoIMG, allowing unattended decoding?  In other words, this would eliminate the need for Orbitron and use the satellite module within SDRC to handle this function.

I very much like the satellite module that Simon has developed.  Being able to use it as described above would free up one program.

To be honest, I was hoping to dedicate my Airspy R2 to weather satellite duties.  As mentioned above, this is not looking good.  So any ideas and comments to the items raised in this message will be greatly appreciated.

Regards,
George
-- Independent Expert on CE marking EMC Consultant Electrical Safety Consultant


Very high CPU load with the AirSpy mini #airspy

Alex DH2ID
 

Hi, I've noticed a cpu load of over 80% using my AirSpy mini with the newest console beta running under Win10 64bit on my ASUS ZenBook UX305CA. Any ideas, how to minimize CPU load? 


Re: Weather Satellite Operation

George Stein - NJ3H
 
Edited

I should have mentioned that the three radios in question are working fine the Broadcast FM band, the amateur vhf/uhf bands, and other services on vhf/uhf.  I is just the satellite reception that is giving me fits.

Also I have played with the gain settings in the software packages as well.

Thanks


Weather Satellite Operation

George Stein - NJ3H
 

Greetings,

I am having a strange happening in trying to listen to the NOAA weather satellites.

The best reception I have is with SDRC and the Elad S2.  When I use my Airspy R2, HF+ discovery, or RSPdx with SDRC or their native software, there is basically no reception.  Is the Elad that much better than the other receivers.  I am surprised that I am seeing such a disparity in signal strengths.

My antenna is a circular dipole from Stellar designed for the FM broadcast band. I am using this very non-perfect antenna until I buy a QFH antenna and a preamp.

Any ideas as to why the other radios seem to be a disappointment?

Another question: The Orbitron/WXtoIMG software can create a list of upcoming passes for the satellites that the user wants to select (days into the future).  This then allows unattended operation for decoding upcoming passes.  Is there a similar capability within SDRC to create such a list, feed it to WXtoIMG, allowing unattended decoding?  In other words, this would eliminate the need for Orbitron and use the satellite module within SDRC to handle this function.

I very much like the satellite module that Simon has developed.  Being able to use it as described above would free up one program.

To be honest, I was hoping to dedicate my Airspy R2 to weather satellite duties.  As mentioned above, this is not looking good.  So any ideas and comments to the items raised in this message will be greatly appreciated.

Regards,
George


Re: Using SDRC to analyse Kiwi recordings

Simon Brown
 

Thanks,

Have it.

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of david via groups.io <zinc65@...>
Sent: 24 August 2022 14:30
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: Re: [SDR-Radio] Using SDRC to analyse Kiwi recordings
 
Hi Simon,
Thanks for the rapid response. I've uploaded a file to a dropbox account, and sent you a link. Thanks for the great software.
David, GM8XBZ

-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 24 August 2022 11:14
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Using SDRC to analyse Kiwi recordings

You need to give me a Kiwi recording in a ZIP on the cloud.

Simon Brown
https://g4eli.com
https://sdr-radio.com








--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Re: Using SDRC to analyse Kiwi recordings

david
 

Hi Simon,
Thanks for the rapid response. I've uploaded a file to a dropbox account, and sent you a link. Thanks for the great software.
David, GM8XBZ

-----Original Message-----
From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Simon Brown
Sent: 24 August 2022 11:14
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Using SDRC to analyse Kiwi recordings

You need to give me a Kiwi recording in a ZIP on the cloud.

Simon Brown
https://g4eli.com
https://sdr-radio.com


Re: Afedri AFE822X dual channel Diversity/phasing support?

potty.dzmeia@...
 
Edited

Hi Simon,

FYI, I am including a link to a post that describes what has been done by oh7aeg (using 4 channel Afedri): https://github.com/AlexandreRouma/SDRPlusPlus/discussions/585
Me personally, I am interested in stereo diversity reception but it seems there are multiple applications of having a coherent multi-channel receivers.
Of course, one can't do everything at once, but at least something to keep in mind when beginning to implement multi-channel support.

Cheers,
Chav/lz1abc

P.S. More hints below:
- Link to a pdf with additional description from oh7aeg: https://www.oh3ad.fi/wp-content/uploads/2022/07/Vaiheohjattu2.pdf
- Screenshot from the pdf showing how he implemented beam switching in "SDR Network Control Box"
ScreenShot


Re: Using SDRC to analyse Kiwi recordings

Simon Brown
 

You need to give me a Kiwi recording in a ZIP on the cloud.

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of david via groups.io <zinc65@...>
Sent: 24 August 2022 10:05
To: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io>
Subject: [SDR-Radio] Using SDRC to analyse Kiwi recordings
 
Hello All,
The Kiwi SDR network is an excellent resource for looking at DX signals from
a 'local' receiver. As well as 'live' listening, you can make a recording,
using the 'IQ' icon. Then, you can study the recording at your leisure.
The recording is only about 12kHz wide, but that is fine for digital
signals. You can playback the recording using SDRConsole, but that software
loses the Frequency information, and only shows a +/- 6kHz spectrum with a
'Zero ' centre.
 Is there already a way to preserve the original recording frequency, or do
we need to talk nicely to "The Master"?

Best Wishes
David, GM8XBZ








--
- + - + -
Please use https://forum.sdr-radio.com:4499/ when posting questions or problems.


Using SDRC to analyse Kiwi recordings

david
 

Hello All,
The Kiwi SDR network is an excellent resource for looking at DX signals from
a 'local' receiver. As well as 'live' listening, you can make a recording,
using the 'IQ' icon. Then, you can study the recording at your leisure.
The recording is only about 12kHz wide, but that is fine for digital
signals. You can playback the recording using SDRConsole, but that software
loses the Frequency information, and only shows a +/- 6kHz spectrum with a
'Zero ' centre.
Is there already a way to preserve the original recording frequency, or do
we need to talk nicely to "The Master"?

Best Wishes
David, GM8XBZ


Re: Anyone seen/heard this on WWV?

Kriss Kliegle KA1GJU
 

Here's an edited (shortened) movie with audio clip of the various test waveforms:

73 Kriss KA1GJU