[amsat-bb] Re: AO-7 QSO 7694 Km

Bob- W7LRD w7lrd at comcast.net
Fri Jan 8 21:50:22 PST 2010

Hello Piraja and all 

Congratulations, a great feat!..  I also am looking forward to a edge to edge QSO with PA1TNO in JO22li  from CN87wk.  If ever successful it would be 7837km.  The allotted time is around 25 seconds  I think though to be successful I might have to increase the height of my satellite array to 50 feet.  This is divorce height, so  efforts will be made at the 18 foot level. 

73 Bob W7LRD 

Seattle. Wa. 


----- Original Message ----- 
From: "ps8rf Piraja" <ps8rf at hotmail.com> 
To: amsat-bb at amsat.org 
Sent: Friday, January 8, 2010 3:14:07 PM GMT -08:00 US/Canada Pacific 
Subject: [amsat-bb]  AO-7 QSO 7694 Km 

Hello all, 

I posted a short video with the contact maintained today with Andre, ZS2BK via AO-7 in mode B  ( Orbit 60848 -  19:47 UTC - 01/08/10 ). We keep the QSO with a small window that the AO-7 has provided us. The window was only about 34 sec, this time interval we could not match any commit error. The distance between the two stations is 4085 miles or 7669 Km. 

Andre wrote via email: " 

"My Doppler calc was also gratefully spot on. For example I calculated that I should call so that my downlink is on 145.944.2 mhz 
I worked out that our Doppler difference would be 3.8 khz and amazing that was spot-on. There is really no time to tune !" 

Andre is right the time was too little for adjustments. Taking also into account that I manually worked the rotor and control of my rig. 

See the sound/video in youtube: 


I hope you enjoy it 


Pirajá, PS8RF                                                
O Novo Windows 7 funciona do jeito que você quer. Clique aqui para conhecer! 
Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the author. 
Not an AMSAT-NA member? Join now to support the amateur satellite program! 
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb 

More information about the AMSAT-BB mailing list