PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/28-17:42:40
G05     47.2           22.5                9.9 +/-    0.73      20.4 +/-    0.73  0.080 / 0.130
G13     83.2           37.3               11.9 +/-    0.64      18.1 +/-    0.64  0.060 / 0.140
G15     129.1          49.3               14.2 +/-    1.06      18.1 +/-    1.06  0.040 / 0.090
G18     241.9          39.7               12.5 +/-    1.56      18.3 +/-    1.56  0.040 / 0.080
G20     21.4           71.6               12.6 +/-    0.86      13.2 +/-    0.86  0.050 / 0.040
G21     311.2          46.7               11.3 +/-    0.66      14.9 +/-    0.66  0.050 / 0.060
G25     200.4          13.3               15.0 +/-    2.81      38.9 +/-    2.81  0.080 / 0.170
G26     296.5          18.7               10.6 +/-    1.34      24.0 +/-    1.34  0.080 / 0.210
G29     147.8          70.4               13.8 +/-    0.94      14.6 +/-    0.94  0.190 / 0.430