The Arecibo Legacy Fast ALFA (ALFALFA) Survey

A2010 page describing common RFI, including GPS.
On occasion, we are warned about planned RFI, especially GPS tests. We'll put them here so that observers can be warned and so that data reducers can refer back.

Note: AST = UTC-4

Active RFI alerts

GPS alert for Nov and Dec 2014 (Does not appear to be an issue for us.)

Previous RFI alerts

GPS alert for Aug, Sept and Dec 2014 (being updated for Nov-Dec 2014)
GPS alert for May, June, Sept and Dec 2014 (updated)
May, June, Sept, Dec 2014 GPS alert (first version)
Dec 2012 GPS alert Not a problem for us
Sep 2012 GPS alert Could have been a big problem, but they heard our pleas and changed the schedule. Another miracle!
Mar 2012 GPS alert A miracle: they cancelled it for us!
Nov-Dec 2011 GPS alert A2010 not affected
Oct-Nov 2011 GPS alert A2010 not affected
Sep 2011 GPS alert 2nd alert for Sep 19th
Sep 2011 GPS alert
Mar 2011 GPS alert
Feb 2011 GPS alert
Jan 2011 GPS alert
Dec 2009 GPS alert
Sep 2009 GPS alert
May 2008 GPS alert
Apr 2008 GPS alert
Mar 2008 GPS alert
Mar 2007 GPS alert
Dec 2006 GPS alert
Oct 2006 GPS alert

Last modified Tue Oct 21 14:44:52 EDT 2014 by martha