[OZAPRS] How to make a raspberry pi satgate for the ISS

[Matthew Cook]

Gavin,

You can go and find the stereo pilot tones in your commercial FM radio
station those are GPS locked rubidium.   We're lucky here in VK5 that our
VHF/UHF beacons are GPS locked, so I typically go and use these to zero in
RTL-SDR's to a few hertz... you might find the ones in Perth are of a
similar nature, never hurts to ask.

73

Matthew
VK5ZM

On 19 November 2017 at 14:56, Gavin Rogers <grogers at vk6hgr.echidna.id.au>
wrote:

> Maybe different in other states, but in Perth the only carrier with GSM
> still is Vodadone, and their coverage isn't good enough where I am to get a
> good calibration.
>
>
>
> On 19 November 2017 11:21:49 am AWST, Peter VK2MPJ <vk2mpj at yahoo.com.au>
> wrote:
>>
>> I’m curious why you say that using kal and a GSM signal is not possible
>> anymore?
>> I did this locally just last weekend…
>>
>> 2MPJ
>>
>>
>> On 19 Nov 2017, at 12:42 pm, Gavin Rogers <grogers at vk6hgr.echidna.id.au>
>> wrote:
>>
>> On 19/11/2017 9:30 AM, vk4tec at tech-software.net wrote:
>>
>>
>> Or, as i've mentioned before, just link to the existing Direwolf SDR+APRS
>> guide, which covers off setting up an igate pretty well:
>> https://github.com/wb2osz/direwolf/blob/master/
>> doc/Raspberry-Pi-SDR-IGate.pdf
>>
>>
>> In this guide, there's a link to a script that will tune to a NOAA
>> frequency and re-calibrate an SDR TV stick ( https://github.com/khaytsus/
>> direwolf-init )
>>
>> What would be a good high-stability signal source here in VK for the
>> calibration? I used to use the kal program to calibrate against GSM
>> transmitters, but that's not possible any more. I'd think the trunking
>> control channel for an emergency services' channel would be stable, strong
>> and always on? Or DAB+ transmitter, or..?
>>
>>
>> 73
>> Gavin.
>>
>>
>> --
>>
>>       Gavin Rogers                     |  Amateur radio station VK6HGR
>>     http://www.livingwaters.com/good   |     http://vk6hgr.ampr.org/
>>                MSN/Skype/Email: grogers at vk6hgr.echidna.id.au
>>
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>>
>>
> --
> Gavin Rogers mobile
>
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