is it possible to just install giant signal jammers in every major city that would render them invisible to icbms?

That probably wouldn't help since by the time a warhead is that close it's trajectory is on a ballistic path. Plus I'm sure they use gps nowadays and a nuclear device doesn't need pin point accuracy.

---

Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.

is it possible to just install giant signal jammers in every major city that would render them invisible to icbms?

ICBM's don't look they want to be stealth. Their targets are lat/lon and loaded before flight. They use INS because they assume GPS is jammed.

---

without gps calibration, ins seems grossly inaccurate for large distances. add an abm equipped with some kind of magnetic pulse jammer and old fashioned flak we will probably be safe from mirvs.

GPS doesn't work very well at high velocities and high altitudes that ICBM reach during their flight.
Also, as has already been stated a nuclear bomb does not have to "hit" its target - think of the destruction of Nagasaki and Hiroshima, those were small bombs, and they raised areas of tens of square miles. A near miss of even a few miles off-centre by a typical ICBM warhead would render most major cities into nuclear deserts :-(

---

Bob Smith
Member of Seti PIPPS (Pluto is a Planet Protest Society)
Somewhere in the (un)known Universe?

without gps calibration, ins seems grossly inaccurate for large distances. add an abm equipped with some kind of magnetic pulse jammer and old fashioned flak we will probably be safe from mirvs.

INS works fine for getting to Pluto and GPS doesn't work there.

---

not true, but that's classified

Kearhoff INS systems accuracy was better than 1 part in 10,000 back in the late 1980's. One has to assume better accuracy now.

---

I worked at Titan II ICBM sites in Kansas in the 1980s. Titan II's were pre-GPS, 1960s technology, and were able to find their target on the other side of the Earth, presumably.

Since inertial accuracy is largely related to time - With range being only a function of time and speed, they'd probably stay pretty accurate over the flight time of the typical ICBM.

GPS doesn't work very well at high velocities and high altitudes that ICBM reach during their flight.
Also, as has already been stated a nuclear bomb does not have to "hit" its target - think of the destruction of Nagasaki and Hiroshima, those were small bombs, and they raised areas of tens of square miles. A near miss of even a few miles off-centre by a typical ICBM warhead would render most major cities into nuclear deserts :-(

.....and most ICBM's are multi headed beasts.

---

Old enough to know better(but)still young enough not to care