Back to Mars
mo at ccr.org
Mon May 26 11:55:22 CDT 2008
Joseph Bento wrote:
> There used to be a time when ham radio operators were at the forefront
> of technology. This lander probably has a five watt or so
> transmitter, and look at the quality of the images returned from 400
> million miles away! Makes a terrestrial DX contact seem a bit
> meaningless. Of course NASA has a bit of an advantage in the antenna
> department. Not everyone can have acres of large parabolics at home.
it's not "just" big antennas. the direct-sequence spread-spectrum
modulation they use lets the watts they have accomplish a lot more.
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