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To: C.K. Houston who wrote (608)	4/14/1998 1:50:00 PM
From: Allen Sampson	Respond to of 1361

Re: GPS Week Rollover I just spoke to an engineer from Trimble Navigation. He informed me that Trimble has just completed testing their range of products, but hasn't issued a statement. He informed me that their should not be an issue with handheld receivers for Bay Area sailboat racing (my hobby). He did say that the test procedure runs six hours and includes three separate tests, per unit. He also noted, as did the US Navy, that marine operators are responsible for ensuring the efficacy of their units. Many thanks to CK for discovering this; I was not aware that a problem existed until this morning. Allen

To: C.K. Houston who wrote (608)	4/14/1998 4:21:00 PM
From: Bill Ounce	Read Replies (1) \| Respond to of 1361

If you get really picky, you're both exaggerating :-) Let's carefully parse the quotes "It's a known, and publicly acknowledged FACT that GPS will fail August 21,1999." C.K. HOUSTON It is not obvious that the entire GPS system will fail; only old non-updated GPS receivers will stop working properly. C.K.'s quote represents an oversimplification that will mislead people. This is false. There was some concern that some GPS receiver firmware would fail to account or EOW rollover in 1999, but this turns out to be a non-issue." BILL WEXLER It costs money to update all those systems. Plus it's difficult to believe that some mis-managed sites won't update their units in time so that their PREVENTABLE GPS receiver failures don't cause some material damage. Hardly a "non-issue". So, Bill's quote also represents an oversimplification that will mislead people. For more technical details: gps.laafb.af.mil laafb.af.mil P.S. Noticed that Air Force states that there are two times where GPS RECEIVER SYSTEMSs may fail. (1) August 21/22 1999 GPS EOW (1024 week problem) (2) January 1 2000, typical Y2K confusion by receiver system.