How long would GPS last if unmaintained?
Posted 16 July 2003 - 09:02 AM
After seeing a recent movie (28 Day After) I was wondering this:
Suppose something happened where the GPS system could no longer be maintained...no monitoring, no corrections, no updates...complete silence from the earth...the sats are completely on their own.
How long could the GPS system remain functional or reliable? Hours, Days, Weeks, Longer?
Posted 16 July 2003 - 09:39 AM
The current generation block IIR sats of which there are 8 in orbit (more to follow) are designed for 14 days non contact in standard mode and up to 180 days in autonmous navigation mode. In this auto mode direct communication between each of the block IIR's maintain system parameters.
Apart from the main control centre at Schriver, there is also a backup Control centre away from Schriver that operates 4 times a year to ensure readiness as well as the pre-launch satellite check-out facility at Cape Canaveral that can act in a limited control role.
I never get lost everybody keeps telling me where to go
Posted 17 July 2003 - 02:38 AM
All the computers and the uplink still running, just no manual input.
I imagine most of the data and corrections sent from the control station are automated.
[This message was edited by Chuck & Kris on July 17, 2003 at 10:54 AM.]
Posted 18 July 2003 - 12:34 PM
Originally posted by TEAM 360:
OH MY GOD! That would mean I have to learn how to use one of those....I mean....a...a...MAP! AAAAAHHHHHHHHH!! NOOOOOOOOOOOOOOO!!!
Don't worry. If society is that far gone you will be more interested in if the dude approaching you is on your kill on sight because it would make your life easier list.
Besides if you run out of bullets you can beat him to death with your GPS.