GPS & Navigation

Countdown

What Inspired NASA to Use a Countdown for Rocket Launches?

NASA retired a historic piece of equipment on December 1, 2014, at the Kennedy Space Center in Florida. It wasn’t a rocket or even a deep space nine-iron. It was the original countdown clock, a large analog display the size of a titan’s wristwatch that stood across the river from the rocket launch site and …

What Inspired NASA to Use a Countdown for Rocket Launches? Read More »

Although GPS is free for the world to use, it costs $2 million per day to operate. The money comes from American tax revenue.

$750 million …the annual operating cost of the Pentagon’s Global Positioning System, according to a new Congressional Research Service report. GPS is a constellation of 24 satellites that now can tell everyone where he or she is in the world (the initial constellation cost $12 billion to put into orbit). The operating cost works out …

Although GPS is free for the world to use, it costs $2 million per day to operate. The money comes from American tax revenue. Read More »