YES SA
has been off since 12:04AM EDT May 2, 2000. Read about it below.
Check
this site
for a running recording of how turning off SA progressed
US Coast Guard Measures Error Plot for Day Before and After SA Turn Off
First Calibrated Accuracy Testing of MOVING tracking accuracy of GPS with SA OFF
David Wilson
and
Wolfgang Rupprecht
Report First 24-hour Post SA Accuracy Tests
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