Here's a walkthrough of the GPS Benchmark mobile phone application:
 1) Splash screen shown on startup
---------------------------------------------------------  4) Set your actual ground truth
location (blue pin marker) by tapping on the map or manually entering a latitude and longitude. You can also scan a QR Code with location information by using the menu options on this screen. |  technology
to analyze -----------------------------------------------------------  5) Now that we've set our true location, the next step is to start a test via the menu. |  3) Next, we must set a ground truth location via the menu. ------------------------------------------------------------
 6) The app has been saving location data since startup in case you want to include the data in the test. You can choose to include or discard the data. |