--- On Tue, 30/4/13, Nick Pugh <quadp...@bellsouth.net> wrote: > Both Pumpkin and ISSIS say they have flight heritage on > 50 watt panels. EaLanta has rides to 600 KM
50 watts on a CubeSat ? That surprises me, I don't know of any that have flown so far that have generated more than about 6 watts of Solar Power. When you say "flight heritage" which CubeSat is being referred to ? A free ELaNa CubeSat launch would mean partnering with an educational institution so part of the 3U and some of the solar power would have to be reserved for their payload. > and we will have to deal with MR Van Allen when we get there. Hopefully deal with it by design on the ground first ;-) RS-15 (beacon 29.325 MHz) has been in the lower part (2,158 by 1,900 km orbit) of the radiation belt for over 18 years. 73 Trevor M5AKA --- On Wed, 1/5/13, M5AKA <m5...@yahoo.co.uk> wrote: > Date: Wednesday, 1 May, 2013, 7:53 > --- On Tue, 30/4/13, g0...@aol.com <g0...@aol.com> > wrote: > > A compromise could be 4 Watts (ish) from MEO. > > Here's an oldie but goodie..... http://www.g0mrf.com/MEOSAT.htm > > Yes MEO would be good. It should be possible to improve the > signal levels while keeping omni-directional antennas on the > satellite by using lower frequencies bands. > > A 144 to 50 MHz (if we can get an allocation there) > transponder or 144 to 28 MHz would have a significantly > reduced path loss on the downlink (8 dB ?) compared to > 435/145. > > 73 Trevor M5AKA _______________________________________________ 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
