PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/28-19:42:50
G05     46.7           25.0               14.4 +/-    1.43      28.1 +/-    1.43  0.170 / 0.360
G13     85.1           37.2               17.2 +/-    1.18      26.2 +/-    1.18  0.200 / 0.440
G15     131.9          48.2               19.8 +/-    0.42      25.5 +/-    0.42  0.080 / 0.070
G18     240.6          38.0               26.6 +/-    1.81      40.0 +/-    1.81  0.060 / 0.070
G20     21.9           71.9               18.3 +/-    0.60      19.1 +/-    0.60  0.090 / 0.190
G21     308.9          44.9               22.6 +/-    0.93      30.5 +/-    0.93  0.080 / 0.190
G25     200.2          13.7               31.7 +/-    2.93      81.3 +/-    2.93  0.130 / 0.120
G26     297.2          18.9               22.6 +/-    1.36      51.2 +/-    1.36  0.160 / 0.090
G29     147.2          73.6               23.1 +/-    0.33      24.0 +/-    0.33  0.040 / 0.030