[disposeofnick9]

Why on earth does the military-industrial complex need to spend money on a duplicate, irrelevant technology? I worked at Trimble Nav in the radio group, and the POTUS has the ability to increase selective available (SA) to an enormous number (which can be defeated by differential/kinematic corrections, but was set to 0 by executive order under Clinton) or disable the unencrypted channel entirely for a particular region or the entire planet (which includes space). WTF!

[jhayward]

Satellites designed after May 2000 no longer have SA capability.

[disposeofnick9]

because it's pointless and since areas can be and have been turned off for non-military receivers.

[jhayward]

No, it has never been turned off since it first went to full availability [1].

[1] http://www.gps.gov/support/faq/#off

[zeveb]

> Why on earth does the military-industrial complex need to spend money on a duplicate, irrelevant technology?

Why on earth do data centres need to spend money on duplicative, irrelevant RAID-1 disks?

[mkehrt]

Presumably whatever they are testing will work on other, similar systems over which the US military does not have control.