Hello Friends,
I have two observations:
The first - the team control of the AO-51 correctly employed the use of PL tone to activate the bird. Here in South America constantly listen to interference from phones and others strangers broadcasts through its downlink. I hope the use of PL tone is adopted and so permanent.
The second observation is related to EME - our friend Roland, PY4ZBZ managed to received the signals from the Arecibo Radio Observatory on 22/03/2010 at 21:30 UTC in 432.045 MHz with only a small UHF antenna for 6 elements and a simple FT1000d transceiver. Roland with his equipment received signals in CW and SSB. Congratulations to our dear friend Roland, who with his feat, he broke the paradigm that is not possible with a simple antenna on hand to listen to a broadcast EME. Taking into consideration the power and the antenna used by KP4AO.
The Antena: http://www.qsl.net/py4zbz/antenas/owa.htm#9
CW audio: http://www.qsl.net/py4zbz/satelite/KP4AO_EME_CW.wav
SSB Audio: http://www.qsl.net/py4zbz/satelite/kp4ao_eme.wav
Entire informations and graphics: http://www.qsl.net/py4zbz/satelite.htm#rl
73,
Piraja, PS8RF
The Amateur Radio is supportive and helpful in any circumstance
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On 11 Apr 2010 at 14:38, ps8rf Piraja wrote:
Date sent: Sun, 11 Apr 2010 14:38:28 +0300 From: ps8rf Piraja ps8rf@hotmail.com Subject: [amsat-bb] Remarks To: amsat-bb@amsat.org
Hello Friends,
I have two observations:
The first - the team control of the AO-51 correctly employed the use of PL tone to activate the bird. Here in South America constantly
listen to interference from phones and others strangers broadcasts through its downlink. I hope the use of PL tone is adopted and so permanent.
I'm not sure if it will in any way as when the satellite will be open the interference will still be present. The only one advantage will be the inteference sources will not be able to open the satellite when no one is using it.
The second observation is related to EME - our friend Roland, PY4ZBZ managed to received the signals from the Arecibo Radio Observatory
on 22/03/2010 at 21:30 UTC in 432.045 MHz with only a small UHF antenna for 6 elements and a simple FT1000d transceiver. Roland with his equipment received signals in CW and SSB. Congratulations to our dear friend Roland, who with his feat, he broke the paradigm that is not possible with a simple antenna on hand to listen to a broadcast EME. Taking into consideration the power and the antenna used by KP4AO.
Domenico I8CVS puts a very detailed math post on the subject it will be challenging to check reality VS theory
Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe DSTAR urcall VE2DWE WAC BASIC CW PHONE SATELLITE
participants (2)
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Luc Leblanc -
ps8rf Piraja