[time-nuts] Alternate frequency sources : DVB-T and ISDN?

[Chuck Harris]

On the other hand, a small cloud of BB pellets projected at 30,000 feet per
second, would turn even the hardiest GPS satellite into an inert piece of
space junk... Or, a small cloud of common nuts and bolts inserted into the reverse
orbit of one of the rings of the GPS constellation, and that ring of satellites
would soon cease to be useful.

The US has already shown that it can disable LEO satellites with missiles launched
from ordinary fighter planes.  MEO satellites ought not to be that big of a
challenge for a space capable nation.  Especially with the GPS satellites
broadcasting such a nice locating beacon.

-Chuck Harris

Bill Hawkins wrote:
> Well, if you're gonna be practical about it, the EMPs that take out GPS
> will convert a lot of silicon chips to sand. This will bring transportation
> to a halt - aircraft, cars, trains (at least their signaling systems), and
> boats (navigation if not engine controls). This could put water, food, and
> energy in short supply, along with manufacturing processes that rely on
> computers for control. Telephone and radio communication would also go away,
> except for the very few battery-powered vacuum tube sets.
> 
> Precision time and frequency would probably drop to last on your priority
> list.
> 
> Have a nice day.
> 
> Bill Hawkins