----- Original Message ----- From: "Nigel Gunn G8IFF/W8IFF" <[email protected]> To: "i8cvs" <[email protected]> Cc: "Fabio A" <[email protected]>; "AMSAT-BB" <[email protected]>; "Mateusz" <[email protected]> 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 _______________________________________________ Sent via [email protected]. 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
