----- Original Message ----- From: "Nigel Gunn G8IFF/W8IFF" nigel@ngunn.net To: "i8cvs" domenico.i8cvs@tin.it Cc: "Fabio A" iw8qku@amsat.org; "AMSAT-BB" amsat-bb@amsat.org; "Mateusz" sq7dqx@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