New Horizon 4.78 Billion Kilometer data links ... information that helps us understand how this works

[Phil]

I believe that the New Horizons transmitter puts out about 28 W from five billion kilometres away. Voyagers 1 and 2 put out less from about 20 billion kilometres away. Ever wondered what it would be like to hear somebody whispering in LA while you listen in DC? This is harder.

Phil M1GWZ



On 21 Jul 2015, at 22:09, Alberto di Bene wrote:

> On 7/21/2015 7:09 PM, Ralph Wallio, W0RPK wrote:
> 
>> Interesting real-time network status is available via https://eyes.nasa.gov/dsn/dsn.html. 
> 
> There is something that I fail to understand on that site....
> Selecting as antenna Madrid 54, sending and receiving from MMS3, it is possible to see what follows :
> 
> <jdicgibg.png>
> 
> Now, a power received of 3.81 x 10^-55 kW, translates (unless I made an error) to about -484 dBm....
> I don't know what the gain of that antenna is, but -484 dBm seem unreasonable....
> 
> 73  Alberto  i2PHD
> 
> 
> 
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