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Features November 2013 Issue

GPS/WAAS Scorecard

We take GPS for granted. But, for it to give us the service it does, it requires constant monitoring and evaluation. Here’s the scorecard (and it’s a good score).

Did you know that GPS performance worldwide is continuously evaluated in great detail, to make sure the system remains safe and reliable for use by everyone? In 1999, the FAA began publishing quarterly Performance Analysis Reports on the basic Standard Positioning Service (SPS) that is provided by GPS. Let’s take a look at some performance information critical to pilots. The latest report covers April 1 to June 30, 2013, and we’ll look at some of…

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