[amsat-bb] Re: Arecibo on 432 MHz Moon Bounce (some calculations)

[i8cvs]

----- Original Message -----
From: "Nigel Gunn G8IFF/W8IFF" <nigel at ngunn.net>
To: "i8cvs" <domenico.i8cvs at tin.it>
Cc: "Fabio A" <iw8qku at amsat.org>; "AMSAT-BB" <amsat-bb at amsat.org>; "Mateusz"
<sq7dqx at poczta.onet.pl>
Sent: Wednesday, April 21, 2010 9:07 PM
Subject: Re: [amsat-bb] Re: Arecibo on 432 MHz Moon Bounce (some
calculations)

> Of course, this ia all rubbish as the stated power of 243TeraWatts (READ
BELOW CAREFULLY) is clearly not true.
> That would require an antenna gain of, in the regeon of, 120dB.
>
> On 21-Apr-10 17:49, i8cvs wrote:
>
> >
> > The only official data given for Arecibo by WF1F are the following :
> >
> >> The 1,000 foot dish has 60 dBi on 432 mc and 400 watts.
> >> That comes out to be approximately 243,902,443 Million Watts ERP.
> >>

Hi Nigel, G8IFF/W8IFF

I disagree with your numbars:

1 tera watt =1 TW = 1 x 10^12 watt or 1,000,000,000,000 watt

1 mega watt = 1MW = 1 x 10^6 watt or 1,000,000 watt or 1 million watt

So 243,902,443 million watt ERP = 243,902,443 MW ERP as WF1F
writes is CORRECT

By the way  the gain of Arecibo is 60 dBi or 1.000.000 time in power
and not 120 dB = 1. x 10^12 or 1.000.000.000.000 time in power

73" de

i8CVS Domenico