REFLECTOR:GPS Outage

Ronnie Brown reflector@tvbf.org
Fri, 19 Sep 2003 15:00:32 -0400


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I know this is off topic, but a bunch of V's are based in Florida.  This =
NOTAM says the GPS system is unreliable for an area of 115 mile radius =
at 4000 feet around a point that is about 50 miles off shore from =
Jacksonville, FL.  This would impact a large area of the southeast. This =
is going on from today through September 23.

Anybody know what is going on?  Is our Navy playing around with one of =
our primary navigation systems??? and compromising the safety of =
aviation in large area of the southeast?  It would seem that if the =
Navy/US Gov needed to test GPS reliability and performance, they could =
get a whole lot further out than 50 miles off the coast????

09/053 - GPS UNRELIABLE WITHIN A 270 NM RADIUS OF 305000N/0802500W AT =
FL400. THIS AREA DECREASES WITH ALTITUDE TO A CIRCLE OF RADIUS 225NM AT =
FL250 THEN TO A CIRCLE OF RADIUS 160NM AT FL100 DOWN TO A CIRCLE OF =
RADIUS 115NM AT 4000 AGL. IFR OPERATIONS BASED UPON GPS NAVIGATION =
SHOULD NOT BE PLANNED IN THE AFFECTED AREA DURING PERIODS INDICATED. =
THESE OPERATIONS INCLUDE DOMESTIC RNAV OR LONG RANGE NAVIGATION =
REQUIRING GPS. THE OPERATIONS ALSO INCLUDE GPS STANDALONE AND OVERLAY =
INSTRUMENT APPROACH OPERATIONS 1500-1900/2300-0300 DLY 19 SEP 15:00 =
UNTIL 23 SEP 03:00

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<DIV><FONT size=3D2>I know this is off topic, but a bunch of V's are =
based in=20
Florida.&nbsp; This NOTAM says the GPS system is unreliable for an area =
of 115=20
mile radius at 4000 feet around a point that is about 50 miles off shore =
from=20
Jacksonville, FL.&nbsp; This would impact a large area of the southeast. =
This is=20
going on from today through September 23.</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>Anybody know what is going on?&nbsp; Is our Navy =
playing=20
around with one of our primary navigation systems??? and compromising =
the safety=20
of aviation in large area of the southeast?&nbsp; It would seem that if =
the=20
Navy/US Gov&nbsp;needed to test GPS reliability and performance, they =
could get=20
a whole lot further out than 50 miles off the coast????</FONT></DIV>
<DIV><FONT size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3D"Courier New"><STRONG>09/053</STRONG> - GPS UNRELIABLE =
WITHIN A=20
270 NM RADIUS OF 305000N/0802500W AT FL400. THIS AREA DECREASES WITH =
ALTITUDE TO=20
A CIRCLE OF RADIUS 225NM AT FL250 THEN TO A CIRCLE OF RADIUS 160NM AT =
FL100 DOWN=20
TO A CIRCLE OF RADIUS 115NM AT 4000 AGL. IFR OPERATIONS BASED UPON GPS=20
NAVIGATION SHOULD NOT BE PLANNED IN THE AFFECTED AREA DURING PERIODS =
INDICATED.=20
THESE OPERATIONS INCLUDE DOMESTIC RNAV OR LONG RANGE NAVIGATION =
REQUIRING GPS.=20
THE OPERATIONS ALSO INCLUDE GPS STANDALONE AND OVERLAY INSTRUMENT =
APPROACH=20
OPERATIONS 1500-1900/2300-0300 DLY 19 SEP 15:00 UNTIL 23 SEP=20
03:00</FONT></DIV></BODY></HTML>

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