[OZAPRS] Doppler graph

vk4tec at tech-software.net vk4tec at tech-software.net
Mon Nov 20 18:22:56 AEDT 2017


Mark

 

Can you log to a text file for me ?

 

Sorry donโ€™t know python 

 

A

 

From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au] On Behalf Of Mark Jessop
Sent: Monday, 20 November 2017 5:07 PM
To: Australian APRS Users <ozaprs at aprs.net.au>
Subject: Re: [OZAPRS] Doppler graph

 

Gpredict is expecting to talk to a Hamib rigctld daemon, and will likely be unhappy if it does not get back the responses it expects.

So, to get frequency data from gpredict, you would need to write something which emulates enough of rigctld to satisfy gpredict.

 

Here's a python script I just hacked up:

https://gist.github.com/darksidelemm/2a1fb385f6fc18566f3bcf29b4929053

 

Gpredict seems happy enough with it. It listens on port 4532 outputs data as follows:

Marks-MacBook-Pro:Dev darkside$ python fake_rigctld.py

Connected by ('127.0.0.1', 49304)

2017-11-20T07:05:10.209830,145888809

2017-11-20T07:05:10.630798,145888810

2017-11-20T07:05:11.634510,145888812

2017-11-20T07:05:12.635496,145888813

... etc

 

73

Mark VK5QI

 

On Mon, Nov 20, 2017 at 5:06 PM, <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net> > wrote:

Downloading gpredict source code to debug 

 

A

 

From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au <mailto:ozaprs-bounces at aprs.net.au> ] On Behalf Of Scott Evans
Sent: Monday, 20 November 2017 4:34 PM


To: Australian APRS Users <ozaprs at aprs.net.au <mailto:ozaprs at aprs.net.au> >
Subject: Re: [OZAPRS] Doppler graph

 

Oops didn't clearly READ! ๐Ÿ˜–

 

On Mon., 20 Nov. 2017, 17:29 , <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net> > wrote:

Only getting a few and then it bombs out

 

A

 

 

Back to gpredict

F  145893173

Back to gpredict

F  145893173

Back to gpredict

F  145893174

Back to gpredict

F  145893175

Back to gpredict

q

Back to gpredict

 

 

From: OZAPRS [mailto:ozaprs-bounces at aprs.net.au <mailto:ozaprs-bounces at aprs.net.au> ] On Behalf Of Scott Evans
Sent: Monday, 20 November 2017 4:22 PM
To: Australian APRS Users <ozaprs at aprs.net.au <mailto:ozaprs at aprs.net.au> >
Subject: Re: [OZAPRS] Doppler graph

 

Gptedict already has Doppler correction support inbuilt? ๐Ÿค” 

 

On Mon., 20 Nov. 2017, 17:04 , <vk4tec at tech-software.net <mailto:vk4tec at tech-software.net> > wrote:

Hi Guys

 

I am trying to graph doppler shift for some satellites

 

Does anyone have perl or python code that would allow gpredict to connect and then I can log the freq and graph it 

 

Cheers 

 

Andrew VK4TEC

 

http://www.tech-software.net/blog

 

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