[amsat-bb] Re: 50 MHz (was S band and Eagle: an appeal for a higherleveldiscussion)

Trevor m5aka at yahoo.co.uk
Tue Sep 12 14:28:24 PDT 2006


Why uplink only ?

Wherever possible it is desirable to have allocation that permit both
Space-to-Earth and Earth-to-Space communications.

73 Trevor M5AKA
--- "Ransom, Kenneth G. (JSC-OC)[BAR]" <kenneth.g.ransom at nasa.gov> wrote:

> Would the allocation be for Uplink only? 
> 
> 
> Kenneth - N5VHO
> 
> -----Original Message-----
> From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
> Behalf Of Trevor
> Sent: Monday, September 11, 2006 4:24 PM
> To: AMSAT BB
> Subject: [amsat-bb] 50 MHz (was S band and Eagle: an appeal for a
> higherleveldiscussion)
> 
> --- Robert Bruninga <bruninga at usna.edu> wrote:
> > Lets preserve 2m downlinks for OMNI directional downlinks to Mobiles 
> > and handhelds where the 19" mobile whip OMNI has a 9 dB  advantage 
> > over 70cm and a 24 dB advantage over 2.4 GHz.
> > 
> > We can easily close the link to mobiles and handhelds with Omni 
> > antennas with 2 meter downlinks from space.  I hope we Continue to 
> > develop this mobile satellite capability.
> > PCSAT and ARISS packet system demonstrate this easily.
> 
> Bob raises a good point here.
> 
> What are peoples views on trying to get an Amateur Satellite Service
> allocation at 50-51 MHz ? 
> 
> Granted omni antennas would be 3 times bigger than 2 metres but we would
> benefit from low path loss and low doppler shift ?
> 
> 73 Trevor M5AKA
> 
> 
> 
> 	
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