Hello everybody, I agree with Trevor, GS requirement for the 2.4 GHz band are quite "challenging".
Anyway, I have another question, what kind of orbit this constellation will be designed for? If it is less than 500 km, how many *months* will it last? 73s Fabio iz5xrc On Mon, Feb 10, 2014 at 8:43 PM, M5AKA <[email protected]> wrote: > Yes, a dish needed, ISS HamTV provides a good illustration of the > requirements to achieve a 2 Mbps downlink at 2400 MHz. > > > 73 Trevor M5AKA > > > > > On Monday, 10 February 2014, 18:16, Howie DeFelice <[email protected]> > wrote: > > Just in case anyone was curious about the practicality of actually > transmitting WiFi from a cubesat, I did a quick link budget. Based on > typical 802.11 specs, the MDS of a receiver is about -90 dBm. The path loss > at 2.4GHz between a ground station and a satellite overhead in a 600Km > orbit is a little over 155 dB. Assuming a zero gain antenna on the typical > WiFi client radio, the required EIRP from the cubesat is in the > neighborhood of 4KW. I don't think we are quite there yet with current > solar cell technology.... not to mention the difficulty keeping the PA cool > :) > > - Howie AB2S > _______________________________________________ > 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 > _______________________________________________ > 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 > _______________________________________________ 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
