AVFR

For scenario 3 assuming visibility of only 5 Galileo satellites, clearly greater number of epochs classified as AVFR than AVSR was obtained.

The residuals obtained from solution classified as correctly resolved and validated (AVRS statistics) are marked with black dots, alternatively residuals obtained with solutions classified to ambiguity validation failure (AVFR) are marked with triangles.

Scenario # number of Galileo numer of EGNOS satellites satellites 1 All observed 0 2a All observed 3 2b All observed 3 3 5 0 4 5 3 Scenario # a priori sigma for EGNOS observations 1 -- 2a [m.sub.obsEGN] = [m.sub.obsGAL] 2b [m.sub.obsEGN] = 5 X [m.sub.obsGAL] 3 -- 4 [m.sub.obsEGN] = 5 X [m.sub.obsGAL] Table 2 Coordinate standard deviations (STD), mean of coordinate residuals (dN, dE, dH), ambiguity resolution and validation success rate (AVSR) and ambiguity validation failure rate (AVFR) obtained with the analyzed scenarios.