I have been getting calls from around Edmonton area about GPS interruptions so I have searched and here is GPS testing schedule for 2012:
12 SEP 2012 – 20 SEP 2012
13 Sep 12 0200Z – 0600Z
13 Sep 12 1900Z – 2059Z
14 Sep 12 0200Z – 0600Z
14 Sep 12 1900Z – 2300Z
18 Sep 12 1600Z – 0000Z
19 Sep 12 0000Z – 0500Z
19 Sep 12 1600Z – 0000Z
20 Sep 12 0000Z – 0600Z
So if you see sudden dropping of satellites it may be due to these testings.
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