[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: 50 MHz (was S band and Eagle: an appeal for ahigherleveldiscussion)



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@nasa.gov> wrote:

> Would the allocation be for Uplink only? 
> 
> 
> Kenneth - N5VHO
> 
> -----Original Message-----
> From: amsat-bb-bounces@amsat.org [mailto:amsat-bb-bounces@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@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
> 
> 
> 
> 	
> 	
> 		
> ___________________________________________________________
> All new Yahoo! Mail "The new Interface is stunning in its simplicity and
> ease of use." - PC Magazine http://uk.docs.yahoo.com/nowyoucan.html
> _______________________________________________
> Sent via AMSAT-BB@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
> 


------------- Chelmsford Amateur Radio Society -------------
Support Essex Air Ambulance - Apply for the Chelmsford Award 
         See CARS website http://www.g0mwt.org.uk/
------------------------------------------------------------


	
	
		
___________________________________________________________ 
All new Yahoo! Mail "The new Interface is stunning in its simplicity and ease of use." - PC Magazine 
http://uk.docs.yahoo.com/nowyoucan.html
_______________________________________________
Sent via AMSAT-BB@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



AMSAT Top AMSAT Home