GPS System Update — Better ROI
Nice news that I picked up today from my former hometown paper, The Gazette:
The Air Force is moving control of its navigation satellites to a new computer system at Schriever Air Force Base next month. They expect no one to notice. If things go seriously haywire, however, consequences could vary from bombs missing their targets in Iraq to the world financial markets collapsing into chaos.
That’s why senior Air Force officials are saying that failure is not an option as the GPS ground control system is switched from a room-sized mainframe computer to a state-of-the-art network.
There’s a big safety net in place, and the worst-case scenario is extremely unlikely, but the big shift won’t be easy…
I’m glad to see the modernization going on line. This has long been needed. The article, however, is a bit too sensational for me. I’m not sure if it’s some higher-ups in the Air Force trying to make a bit more of the day-to-day boredom of their existence a bit more exciting, or the news reporter being a little too much in awe of the folks he’s reporting on.
The GPS satellites themselves, once established on orbit and checked out are essentially autonomous for at least 30 days. This is the way the system was designed from day one, and the reason the “money men” at the Pentagon have resisted moves for years to establish a second, autonomous control center for the GPS at a location removed from Schriever AFB. Each bird “takes care” of itself if left alone … so if there is some “glitch” that hasn’t been foreseen in the switchover, no planes are going astray and no world financial systems are going to crash … that’s a bit much, Tom, don’t you think?
2 SOPS people at Falcon Schriever have done way more than the minimums to keep the system healthy and to improve accuracy above and beyond the system standard accuracies. They basically “touch” each bird once or twice a day and update clock rates and other parameters that improve the accuracy beyond specs. They also have been very innovative over the years in doing sophisticated “remote maintenance” to the batteries onboard each satellite to make them “love” long past their designed life. But any day they don’t “touch’” a specific space segment assets only means the asset will routinely and gradually begin regressing back toward the designed, minimum performance goals … let’s not throw too much drama into the mix.
None the less this is important news because the existing system dates from the 1970s and 1980s and is really no longer maintainable. Moving the control system software onto a modern, supportable platform will provide a positive ROI in terms of easier (and thus cheaper) maintenance and will make the control contacts that the operators perform work better, faster, cheaper as well. As I have said here before, my hat is always off to my former colleagues at Schriever … military, government civil service and contractor personnel. Keep ‘em flying, guys and gals!
