HelloFabio, fromexperiencewithFITSAT-1,thelaunchtook placefromtheISS( orbit ~ 400km). Thelifetime willbeupapprox.9months. But, thisisinfluencedbytheshapeandsizeof thesatellite.
73´s de Michael, DD5ER -- AMSAT-DL e.V. -- International Satellites for Communication, Science and Education -- mlengrues...@amsat-dl.org http://www.amsat-dl.org Am 12.02.2014 15:45, schrieb Fabio Azzarello: > 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 <m5...@yahoo.co.uk> 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 <howied...@hotmail.com> >> 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 AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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 AMSAT-BB@amsat.org. 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
