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Re: Easy-0n 40

At 01:20 PM 6/7/2001, TDCarrell wrote:
>The ao40_s2.XLS program has been most helpful. Now I am looking
>at Easy-Up. Has anyone produced anything like ao40_s2 program for
>up-link calculation? Preferably 2M, 70cm & 23cm. I'm lazy so I'd
>appreciate any help with a spread sheet.

I published a full link budget (up and down) for AO40 some time ago at

This is a single link budget for a ROUND TRIP.  In my opinion, that is what 
makes sense.  For many years, people in AMSAT have published these "half" 
link budgets, just down, for example, assuming some level of power out of 
the transponder.  That never made sense to me.  I'd like to encourage 
people to think of this as a system, and compute budgets for the FULL link 
instead of half.  There are difficulties associated with this.  Namely, the 
satellite team has never published a transponder gain number.  Such a 
number is a critical component of a link budget.  So... you have to 
guess.  Someday we'll have a number from some measurements I suppose.

I urge you to think of the communications link as a system, and not just a 
downlink or uplink.

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