I decided to spend a minute googling, here's a paper with a lot of cool tech details:
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.466.3341&rep=rep1&type=pdf 73 jeff wk6i On Thu, Jul 16, 2015 at 11:31 AM, Jeff Stai <[email protected]> wrote: > Well, at least they have big antennas. ;) I read the other day on the NOVA > website that New Horizons will be downloading the data acquired in the > flyby at a data rate of only 1 kb/s - think "1200 baud modem" for those of > you old enough to remember them. And there was another fascinating article > there about how they use Reed-Solomon error correcting codes to compensate > for the inevitable bit errors and reduce the need for retransmission (and > now using the same RS code for DNA data storage, very cool stuff.) > > Nothing about the path loss, but knowing the data rate is so low, and that > the RS code is probably good for a considerable error burst of several > bits, that should at least give you a sense of what the loss might be! > > 73 jeff wk6i > > On Thu, Jul 16, 2015 at 11:10 AM, <[email protected]> wrote: > >> Heard last night on Nova program that the transmitter on the Pathfinder >> Pluto probe was 10 watts. Anyone have a clue as to the signal path loss at >> 3 billion miles and what levels the deep space dish receiving networks are >> dealing with? Incredible that the data stream can be extracted from the >> noise. >> Mike AC5P >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] > > > > > -- > Jeff Stai ~ [email protected] > Twisted Oak Winery ~ http://www.twistedoak.com/ > Facebook ~ http://www.facebook.com/twistedoak > -- Jeff Stai ~ [email protected] Twisted Oak Winery ~ http://www.twistedoak.com/ Facebook ~ http://www.facebook.com/twistedoak ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
