[hpsdr] Strange question about Penelope

[Tom Clark, K3IO]

Alberto I2PHD wrote:
> ..... The full duplex limitation is really a limitation if what one 
> intends to do is to implement a linear transponder (which could also 
> be an interesting application in itself), but not if you limit 
> yourself to a WAV file playback. 
In the AMSAT world, we (G6LVB in the UK & N4HY/AB2KT/W2GPS/K3IO in USA) 
have been developing SDX (Software Defined Xponders) for spacecraft use 
for several years. Just this past weekend at Dayton we demonstrated the 
SDX designed for Suitsat-2 functioning as a 48 kHz-wide 70cm > 2m 
transponder; this is the HPSDR project known as Odyssey (for an earlier 
version, see http://hpsdr.org/wiki/index.php?title=ODYSSEY).

Two versions of a more sophisticated SDX presently destined for the P3E 
satellite have been done in UK & US. The US version was described in the 
paper  http://gpstime.com/files/amsat/SDX_and_Future_AMSAT_Missions.pdf 
and the SDX can be heard at 
http://gpstime.com/files/amsat/Eagle_SDT_1st_Contact.mp3.

73 de Tom, K3IO (ex W3IWI)

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